pdf/instance.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "pdf/instance.h"
   6
   7 #include <algorithm>  // for min()
   8 #define _USE_MATH_DEFINES  // for M_PI
   9 #include <cmath>      // for log() and pow()
  10 #include <math.h>
  11 #include <list>
  12
  13 #include "base/json/json_reader.h"
  14 #include "base/json/json_writer.h"
  15 #include "base/logging.h"
  16 #include "base/strings/string_number_conversions.h"
  17 #include "base/strings/string_split.h"
  18 #include "base/strings/string_util.h"
  19 #include "base/values.h"
  20 #include "chrome/browser/chrome_page_zoom_constants.h"
  21 #include "chrome/common/content_restriction.h"
  22 #include "content/public/common/page_zoom.h"
  23 #include "net/base/escape.h"
  24 #include "pdf/draw_utils.h"
  25 #include "pdf/number_image_generator.h"
  26 #include "pdf/pdf.h"
  27 #include "pdf/resource_consts.h"
  28 #include "ppapi/c/dev/ppb_cursor_control_dev.h"
  29 #include "ppapi/c/pp_errors.h"
  30 #include "ppapi/c/pp_rect.h"
  31 #include "ppapi/c/private/ppp_pdf.h"
  32 #include "ppapi/c/trusted/ppb_url_loader_trusted.h"
  33 #include "ppapi/cpp/core.h"
  34 #include "ppapi/cpp/dev/font_dev.h"
  35 #include "ppapi/cpp/dev/memory_dev.h"
  36 #include "ppapi/cpp/dev/text_input_dev.h"
  37 #include "ppapi/cpp/module.h"
  38 #include "ppapi/cpp/point.h"
  39 #include "ppapi/cpp/private/pdf.h"
  40 #include "ppapi/cpp/rect.h"
  41 #include "ppapi/cpp/resource.h"
  42 #include "ppapi/cpp/url_request_info.h"
  43 #include "ui/events/keycodes/keyboard_codes.h"
  44
  45 #if defined(OS_MACOSX)
  46 #include "base/mac/mac_util.h"
  47 #endif
  48
  49 namespace chrome_pdf {
  50
  51 struct ToolbarButtonInfo {
  52   uint32 id;
  53   Button::ButtonStyle style;
  54   PP_ResourceImage normal;
  55   PP_ResourceImage highlighted;
  56   PP_ResourceImage pressed;
  57 };
  58
  59 namespace {
  60
  61 // Uncomment following #define to enable thumbnails.
  62 // #define ENABLE_THUMBNAILS
  63
  64 const uint32 kToolbarSplashTimeoutMs = 6000;
  65 const uint32 kMessageTextColor = 0xFF575757;
  66 const uint32 kMessageTextSize = 22;
  67 const uint32 kProgressFadeTimeoutMs = 250;
  68 const uint32 kProgressDelayTimeoutMs = 1000;
  69 const uint32 kAutoScrollTimeoutMs = 50;
  70 const double kAutoScrollFactor = 0.2;
  71
  72 // Javascript methods.
  73 const char* kJSAccessibility = "accessibility";
  74 const char* kJSDocumentLoadComplete = "documentLoadComplete";
  75 const char* kJSGetHeight = "getHeight";
  76 const char* kJSGetHorizontalScrollbarThickness =
  77     "getHorizontalScrollbarThickness";
  78 const char* kJSGetPageLocationNormalized = "getPageLocationNormalized";
  79 const char* kJSGetVerticalScrollbarThickness = "getVerticalScrollbarThickness";
  80 const char* kJSGetWidth = "getWidth";
  81 const char* kJSGetZoomLevel = "getZoomLevel";
  82 const char* kJSGoToPage = "goToPage";
  83 const char* kJSGrayscale = "grayscale";
  84 const char* kJSLoadPreviewPage = "loadPreviewPage";
  85 const char* kJSOnLoad = "onload";
  86 const char* kJSOnPluginSizeChanged = "onPluginSizeChanged";
  87 const char* kJSOnScroll = "onScroll";
  88 const char* kJSPageXOffset = "pageXOffset";
  89 const char* kJSPageYOffset = "pageYOffset";
  90 const char* kJSPrintPreviewPageCount = "printPreviewPageCount";
  91 const char* kJSReload = "reload";
  92 const char* kJSRemovePrintButton = "removePrintButton";
  93 const char* kJSResetPrintPreviewUrl = "resetPrintPreviewUrl";
  94 const char* kJSSendKeyEvent = "sendKeyEvent";
  95 const char* kJSSetPageNumbers = "setPageNumbers";
  96 const char* kJSSetPageXOffset = "setPageXOffset";
  97 const char* kJSSetPageYOffset = "setPageYOffset";
  98 const char* kJSSetZoomLevel = "setZoomLevel";
  99 const char* kJSZoomFitToHeight = "fitToHeight";
 100 const char* kJSZoomFitToWidth = "fitToWidth";
 101 const char* kJSZoomIn = "zoomIn";
 102 const char* kJSZoomOut = "zoomOut";
 103
 104 // URL reference parameters.
 105 // For more possible parameters, see RFC 3778 and the "PDF Open Parameters"
 106 // document from Adobe.
 107 const char kDelimiters[] = "#&";
 108 const char kNamedDest[] = "nameddest";
 109 const char kPage[] = "page";
 110
 111 const char kChromePrint[] = "chrome://print/";
 112
 113 // Dictionary Value key names for the document accessibility info
 114 const char kAccessibleNumberOfPages[] = "numberOfPages";
 115 const char kAccessibleLoaded[] = "loaded";
 116 const char kAccessibleCopyable[] = "copyable";
 117
 118 const ToolbarButtonInfo kPDFToolbarButtons[] = {
 119   { kFitToPageButtonId, Button::BUTTON_STATE,
 120       PP_RESOURCEIMAGE_PDF_BUTTON_FTP,
 121       PP_RESOURCEIMAGE_PDF_BUTTON_FTP_HOVER,
 122       PP_RESOURCEIMAGE_PDF_BUTTON_FTP_PRESSED },
 123   { kFitToWidthButtonId, Button::BUTTON_STATE,
 124       PP_RESOURCEIMAGE_PDF_BUTTON_FTW,
 125       PP_RESOURCEIMAGE_PDF_BUTTON_FTW_HOVER,
 126       PP_RESOURCEIMAGE_PDF_BUTTON_FTW_PRESSED },
 127   { kZoomOutButtonId, Button::BUTTON_CLICKABLE,
 128       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMOUT,
 129       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMOUT_HOVER,
 130       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMOUT_PRESSED },
 131   { kZoomInButtonId, Button::BUTTON_CLICKABLE,
 132       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMIN,
 133       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMIN_HOVER,
 134       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMIN_PRESSED },
 135   { kSaveButtonId, Button::BUTTON_CLICKABLE,
 136       PP_RESOURCEIMAGE_PDF_BUTTON_SAVE,
 137       PP_RESOURCEIMAGE_PDF_BUTTON_SAVE_HOVER,
 138       PP_RESOURCEIMAGE_PDF_BUTTON_SAVE_PRESSED },
 139   { kPrintButtonId, Button::BUTTON_CLICKABLE,
 140       PP_RESOURCEIMAGE_PDF_BUTTON_PRINT,
 141       PP_RESOURCEIMAGE_PDF_BUTTON_PRINT_HOVER,
 142       PP_RESOURCEIMAGE_PDF_BUTTON_PRINT_PRESSED },
 143 };
 144
 145 const ToolbarButtonInfo kPDFNoPrintToolbarButtons[] = {
 146   { kFitToPageButtonId, Button::BUTTON_STATE,
 147       PP_RESOURCEIMAGE_PDF_BUTTON_FTP,
 148       PP_RESOURCEIMAGE_PDF_BUTTON_FTP_HOVER,
 149       PP_RESOURCEIMAGE_PDF_BUTTON_FTP_PRESSED },
 150   { kFitToWidthButtonId, Button::BUTTON_STATE,
 151       PP_RESOURCEIMAGE_PDF_BUTTON_FTW,
 152       PP_RESOURCEIMAGE_PDF_BUTTON_FTW_HOVER,
 153       PP_RESOURCEIMAGE_PDF_BUTTON_FTW_PRESSED },
 154   { kZoomOutButtonId, Button::BUTTON_CLICKABLE,
 155       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMOUT,
 156       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMOUT_HOVER,
 157       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMOUT_PRESSED },
 158   { kZoomInButtonId, Button::BUTTON_CLICKABLE,
 159       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMIN,
 160       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMIN_HOVER,
 161       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMIN_PRESSED },
 162   { kSaveButtonId, Button::BUTTON_CLICKABLE,
 163       PP_RESOURCEIMAGE_PDF_BUTTON_SAVE,
 164       PP_RESOURCEIMAGE_PDF_BUTTON_SAVE_HOVER,
 165       PP_RESOURCEIMAGE_PDF_BUTTON_SAVE_PRESSED },
 166   { kPrintButtonId, Button::BUTTON_CLICKABLE,
 167       PP_RESOURCEIMAGE_PDF_BUTTON_PRINT_DISABLED,
 168       PP_RESOURCEIMAGE_PDF_BUTTON_PRINT_DISABLED,
 169       PP_RESOURCEIMAGE_PDF_BUTTON_PRINT_DISABLED }
 170 };
 171
 172 const ToolbarButtonInfo kPrintPreviewToolbarButtons[] = {
 173   { kFitToPageButtonId, Button::BUTTON_STATE,
 174       PP_RESOURCEIMAGE_PDF_BUTTON_FTP,
 175       PP_RESOURCEIMAGE_PDF_BUTTON_FTP_HOVER,
 176       PP_RESOURCEIMAGE_PDF_BUTTON_FTP_PRESSED },
 177   { kFitToWidthButtonId, Button::BUTTON_STATE,
 178       PP_RESOURCEIMAGE_PDF_BUTTON_FTW,
 179       PP_RESOURCEIMAGE_PDF_BUTTON_FTW_HOVER,
 180       PP_RESOURCEIMAGE_PDF_BUTTON_FTW_PRESSED },
 181   { kZoomOutButtonId, Button::BUTTON_CLICKABLE,
 182       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMOUT,
 183       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMOUT_HOVER,
 184       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMOUT_PRESSED },
 185   { kZoomInButtonId, Button::BUTTON_CLICKABLE,
 186       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMIN_END,
 187       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMIN_END_HOVER,
 188       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMIN_END_PRESSED },
 189 };
 190
 191 static const char kPPPPdfInterface[] = PPP_PDF_INTERFACE_1;
 192
 193 PP_Var GetLinkAtPosition(PP_Instance instance, PP_Point point) {
 194   pp::Var var;
 195   void* object =
 196       pp::Instance::GetPerInstanceObject(instance, kPPPPdfInterface);
 197   if (object)
 198     var = static_cast<Instance*>(object)->GetLinkAtPosition(pp::Point(point));
 199   return var.Detach();
 200 }
 201
 202 void Transform(PP_Instance instance, PP_PrivatePageTransformType type) {
 203   void* object =
 204       pp::Instance::GetPerInstanceObject(instance, kPPPPdfInterface);
 205   if (object) {
 206     Instance* obj_instance = static_cast<Instance*>(object);
 207     switch (type) {
 208       case PP_PRIVATEPAGETRANSFORMTYPE_ROTATE_90_CW:
 209         obj_instance->RotateClockwise();
 210         break;
 211       case PP_PRIVATEPAGETRANSFORMTYPE_ROTATE_90_CCW:
 212         obj_instance->RotateCounterclockwise();
 213         break;
 214     }
 215   }
 216 }
 217
 218 const PPP_Pdf ppp_private = {
 219   &GetLinkAtPosition,
 220   &Transform
 221 };
 222
 223 int ExtractPrintPreviewPageIndex(const std::string& src_url) {
 224   // Sample |src_url| format: chrome://print/id/page_index/print.pdf
 225   std::vector<std::string> url_substr;
 226   base::SplitString(src_url.substr(strlen(kChromePrint)), '/', &url_substr);
 227   if (url_substr.size() != 3)
 228     return -1;
 229
 230   if (url_substr[2] != "print.pdf")
 231     return -1;
 232
 233   int page_index = 0;
 234   if (!base::StringToInt(url_substr[1], &page_index))
 235     return -1;
 236   return page_index;
 237 }
 238
 239 bool IsPrintPreviewUrl(const std::string& url) {
 240   return url.substr(0, strlen(kChromePrint)) == kChromePrint;
 241 }
 242
 243 void ScalePoint(float scale, pp::Point* point) {
 244   point->set_x(static_cast<int>(point->x() * scale));
 245   point->set_y(static_cast<int>(point->y() * scale));
 246 }
 247
 248 void ScaleRect(float scale, pp::Rect* rect) {
 249   int left = static_cast<int>(floorf(rect->x() * scale));
 250   int top = static_cast<int>(floorf(rect->y() * scale));
 251   int right = static_cast<int>(ceilf((rect->x() + rect->width()) * scale));
 252   int bottom = static_cast<int>(ceilf((rect->y() + rect->height()) * scale));
 253   rect->SetRect(left, top, right - left, bottom - top);
 254 }
 255
 256 template<class T>
 257 T ClipToRange(T value, T lower_boundary, T upper_boundary) {
 258   DCHECK(lower_boundary <= upper_boundary);
 259   return std::max<T>(lower_boundary, std::min<T>(value, upper_boundary));
 260 }
 261
 262 }  // namespace
 263
 264 Instance::Instance(PP_Instance instance)
 265     : pp::InstancePrivate(instance),
 266       pp::Find_Private(this),
 267       pp::Printing_Dev(this),
 268       pp::Selection_Dev(this),
 269       pp::WidgetClient_Dev(this),
 270       pp::Zoom_Dev(this),
 271       cursor_(PP_CURSORTYPE_POINTER),
 272       timer_pending_(false),
 273       current_timer_id_(0),
 274       zoom_(1.0),
 275       device_scale_(1.0),
 276       printing_enabled_(true),
 277       hidpi_enabled_(false),
 278       full_(IsFullFrame()),
 279       zoom_mode_(full_ ? ZOOM_AUTO : ZOOM_SCALE),
 280       did_call_start_loading_(false),
 281       is_autoscroll_(false),
 282       scrollbar_thickness_(-1),
 283       scrollbar_reserved_thickness_(-1),
 284       current_tb_info_(NULL),
 285       current_tb_info_size_(0),
 286       paint_manager_(this, this, true),
 287       delayed_progress_timer_id_(0),
 288       first_paint_(true),
 289       painted_first_page_(false),
 290       show_page_indicator_(false),
 291       document_load_state_(LOAD_STATE_LOADING),
 292       preview_document_load_state_(LOAD_STATE_COMPLETE),
 293       told_browser_about_unsupported_feature_(false),
 294       print_preview_page_count_(0) {
 295   loader_factory_.Initialize(this);
 296   timer_factory_.Initialize(this);
 297   form_factory_.Initialize(this);
 298   print_callback_factory_.Initialize(this);
 299   engine_.reset(PDFEngine::Create(this));
 300   pp::Module::Get()->AddPluginInterface(kPPPPdfInterface, &ppp_private);
 301   AddPerInstanceObject(kPPPPdfInterface, this);
 302
 303   RequestFilteringInputEvents(PP_INPUTEVENT_CLASS_MOUSE);
 304   RequestFilteringInputEvents(PP_INPUTEVENT_CLASS_WHEEL);
 305   RequestFilteringInputEvents(PP_INPUTEVENT_CLASS_KEYBOARD);
 306   RequestFilteringInputEvents(PP_INPUTEVENT_CLASS_TOUCH);
 307 }
 308
 309 Instance::~Instance() {
 310   RemovePerInstanceObject(kPPPPdfInterface, this);
 311 }
 312
 313 bool Instance::Init(uint32_t argc, const char* argn[], const char* argv[]) {
 314   // For now, we hide HiDPI support behind a flag.
 315   if (pp::PDF::IsFeatureEnabled(this, PP_PDFFEATURE_HIDPI))
 316     hidpi_enabled_ = true;
 317
 318   printing_enabled_ = pp::PDF::IsFeatureEnabled(this, PP_PDFFEATURE_PRINTING);
 319   if (printing_enabled_) {
 320     CreateToolbar(kPDFToolbarButtons, arraysize(kPDFToolbarButtons));
 321   } else {
 322     CreateToolbar(kPDFNoPrintToolbarButtons,
 323                   arraysize(kPDFNoPrintToolbarButtons));
 324   }
 325
 326   CreateProgressBar();
 327
 328   // Load autoscroll anchor image.
 329   autoscroll_anchor_ =
 330       CreateResourceImage(PP_RESOURCEIMAGE_PDF_PAN_SCROLL_ICON);
 331
 332 #ifdef ENABLE_THUMBNAILS
 333   CreateThumbnails();
 334 #endif
 335   const char* url = NULL;
 336   for (uint32_t i = 0; i < argc; ++i) {
 337     if (strcmp(argn[i], "src") == 0) {
 338       url = argv[i];
 339       break;
 340     }
 341   }
 342
 343   if (!url)
 344     return false;
 345
 346   CreatePageIndicator(IsPrintPreviewUrl(url));
 347
 348   if (!full_) {
 349     // For PDFs embedded in a frame, we don't get the data automatically like we
 350     // do for full-frame loads.  Start loading the data manually.
 351     LoadUrl(url);
 352   }
 353
 354   ZoomLimitsChanged(kMinZoom, kMaxZoom);
 355
 356   text_input_.reset(new pp::TextInput_Dev(this));
 357
 358   url_ = url;
 359   return engine_->New(url);
 360 }
 361
 362 bool Instance::HandleDocumentLoad(const pp::URLLoader& loader) {
 363   delayed_progress_timer_id_ = ScheduleTimer(kProgressBarId,
 364                                              kProgressDelayTimeoutMs);
 365   return engine_->HandleDocumentLoad(loader);
 366 }
 367
 368 bool Instance::HandleInputEvent(const pp::InputEvent& event) {
 369   // To simplify things, convert the event into device coordinates if it is
 370   // a mouse event.
 371   pp::InputEvent event_device_res(event);
 372   {
 373     pp::MouseInputEvent mouse_event(event);
 374     if (!mouse_event.is_null()) {
 375       pp::Point point = mouse_event.GetPosition();
 376       pp::Point movement = mouse_event.GetMovement();
 377       ScalePoint(device_scale_, &point);
 378       ScalePoint(device_scale_, &movement);
 379       mouse_event = pp::MouseInputEvent(
 380           this,
 381           event.GetType(),
 382           event.GetTimeStamp(),
 383           event.GetModifiers(),
 384           mouse_event.GetButton(),
 385           point,
 386           mouse_event.GetClickCount(),
 387           movement);
 388       event_device_res = mouse_event;
 389     }
 390   }
 391
 392   // Check if we need to go to autoscroll mode.
 393   if (event.GetType() == PP_INPUTEVENT_TYPE_MOUSEMOVE &&
 394      (event.GetModifiers() & PP_INPUTEVENT_MODIFIER_MIDDLEBUTTONDOWN)) {
 395     pp::MouseInputEvent mouse_event(event_device_res);
 396     pp::Point pos = mouse_event.GetPosition();
 397     EnableAutoscroll(pos);
 398     UpdateCursor(CalculateAutoscroll(pos));
 399     return true;
 400   } else {
 401     // Quit autoscrolling on any other event.
 402     DisableAutoscroll();
 403   }
 404
 405 #ifdef ENABLE_THUMBNAILS
 406   if (event.GetType() == PP_INPUTEVENT_TYPE_MOUSELEAVE)
 407     thumbnails_.SlideOut();
 408
 409   if (thumbnails_.HandleEvent(event_device_res))
 410     return true;
 411 #endif
 412
 413   if (toolbar_->HandleEvent(event_device_res))
 414     return true;
 415
 416 #ifdef ENABLE_THUMBNAILS
 417   if (v_scrollbar_.get() && event.GetType() == PP_INPUTEVENT_TYPE_MOUSEMOVE) {
 418     pp::MouseInputEvent mouse_event(event);
 419     pp::Point pt = mouse_event.GetPosition();
 420     pp::Rect v_scrollbar_rc;
 421     v_scrollbar_->GetLocation(&v_scrollbar_rc);
 422     // There is a bug (https://bugs.webkit.org/show_bug.cgi?id=45208)
 423     // in the webkit that makes event.u.mouse.button
 424     // equal to PP_INPUTEVENT_MOUSEBUTTON_LEFT, even when no button is pressed.
 425     // To work around this issue we use modifier for now, and will switch
 426     // to button once the bug is fixed and webkit got merged back to our tree.
 427     if (v_scrollbar_rc.Contains(pt) &&
 428         (event.GetModifiers() & PP_INPUTEVENT_MODIFIER_LEFTBUTTONDOWN)) {
 429       thumbnails_.SlideIn();
 430     }
 431
 432     // When scrollbar is in the scrolling mode we should display thumbnails
 433     // even the mouse is outside the thumbnail and scrollbar areas.
 434     // If mouse is outside plugin area, we are still getting mouse move events
 435     // while scrolling. See bug description for details:
 436     // http://code.google.com/p/chromium/issues/detail?id=56444
 437     if (!v_scrollbar_rc.Contains(pt) && thumbnails_.visible() &&
 438         !(event.GetModifiers() & PP_INPUTEVENT_MODIFIER_LEFTBUTTONDOWN) &&
 439         !thumbnails_.rect().Contains(pt)) {
 440       thumbnails_.SlideOut();
 441     }
 442   }
 443 #endif
 444
 445   // Need to pass the event to the engine first, since if we're over an edit
 446   // control we want it to get keyboard events (like space) instead of the
 447   // scrollbar.
 448   // TODO: will have to offset the mouse coordinates once we support bidi and
 449   // there could be scrollbars on the left.
 450   pp::InputEvent offset_event(event_device_res);
 451   bool try_engine_first = true;
 452   switch (offset_event.GetType()) {
 453     case PP_INPUTEVENT_TYPE_MOUSEDOWN:
 454     case PP_INPUTEVENT_TYPE_MOUSEUP:
 455     case PP_INPUTEVENT_TYPE_MOUSEMOVE:
 456     case PP_INPUTEVENT_TYPE_MOUSEENTER:
 457     case PP_INPUTEVENT_TYPE_MOUSELEAVE: {
 458       pp::MouseInputEvent mouse_event(event_device_res);
 459       pp::MouseInputEvent mouse_event_dip(event);
 460       pp::Point point = mouse_event.GetPosition();
 461       point.set_x(point.x() - available_area_.x());
 462       offset_event = pp::MouseInputEvent(
 463           this,
 464           event.GetType(),
 465           event.GetTimeStamp(),
 466           event.GetModifiers(),
 467           mouse_event.GetButton(),
 468           point,
 469           mouse_event.GetClickCount(),
 470           mouse_event.GetMovement());
 471       if (!engine_->IsSelecting()) {
 472         if (!IsOverlayScrollbar() &&
 473             !available_area_.Contains(mouse_event.GetPosition())) {
 474           try_engine_first = false;
 475         } else if (IsOverlayScrollbar()) {
 476           pp::Rect temp;
 477           if ((v_scrollbar_.get() && v_scrollbar_->GetLocation(&temp) &&
 478               temp.Contains(mouse_event_dip.GetPosition())) ||
 479               (h_scrollbar_.get() && h_scrollbar_->GetLocation(&temp) &&
 480               temp.Contains(mouse_event_dip.GetPosition()))) {
 481             try_engine_first = false;
 482           }
 483         }
 484       }
 485       break;
 486     }
 487     default:
 488       break;
 489   }
 490   if (try_engine_first && engine_->HandleEvent(offset_event))
 491     return true;
 492
 493   // Left/Right arrows should scroll to the beginning of the Prev/Next page if
 494   // there is no horizontal scroll bar.
 495   // If fit-to-height, PgDown/PgUp should scroll to the beginning of the
 496   // Prev/Next page.
 497   if (v_scrollbar_.get() && event.GetType() == PP_INPUTEVENT_TYPE_KEYDOWN) {
 498     pp::KeyboardInputEvent keyboard_event(event);
 499     bool page_down =
 500         (!h_scrollbar_.get() &&
 501             keyboard_event.GetKeyCode() == ui::VKEY_RIGHT) ||
 502         (zoom_mode_ == ZOOM_FIT_TO_PAGE &&
 503             keyboard_event.GetKeyCode() == ui::VKEY_NEXT);
 504     bool page_up =
 505         (!h_scrollbar_.get() &&
 506             keyboard_event.GetKeyCode() == ui::VKEY_LEFT) ||
 507         (zoom_mode_ == ZOOM_FIT_TO_PAGE &&
 508             keyboard_event.GetKeyCode() == ui::VKEY_PRIOR);
 509
 510     if (page_down) {
 511       int page = engine_->GetFirstVisiblePage();
 512       // Engine calculates visible page including delimiter to the page size.
 513       // We need to check here if the page itself is completely out of view and
 514       // scroll to the next one in that case.
 515       if (engine_->GetPageRect(page).bottom() * zoom_ <=
 516           v_scrollbar_->GetValue())
 517         page++;
 518       ScrollToPage(page + 1);
 519       UpdateCursor(PP_CURSORTYPE_POINTER);
 520       return true;
 521     } else if (page_up) {
 522       int page = engine_->GetFirstVisiblePage();
 523       if (engine_->GetPageRect(page).y() * zoom_ >= v_scrollbar_->GetValue())
 524         page--;
 525       ScrollToPage(page);
 526       UpdateCursor(PP_CURSORTYPE_POINTER);
 527       return true;
 528     }
 529   }
 530
 531   if (v_scrollbar_.get() && v_scrollbar_->HandleEvent(event)) {
 532     UpdateCursor(PP_CURSORTYPE_POINTER);
 533     return true;
 534   }
 535
 536   if (h_scrollbar_.get() && h_scrollbar_->HandleEvent(event)) {
 537     UpdateCursor(PP_CURSORTYPE_POINTER);
 538     return true;
 539   }
 540
 541   if (timer_pending_ &&
 542       (event.GetType() == PP_INPUTEVENT_TYPE_MOUSEUP ||
 543        event.GetType() == PP_INPUTEVENT_TYPE_MOUSEMOVE)) {
 544     timer_factory_.CancelAll();
 545     timer_pending_ = false;
 546   } else if (event.GetType() == PP_INPUTEVENT_TYPE_MOUSEMOVE &&
 547              engine_->IsSelecting()) {
 548     bool set_timer = false;
 549     pp::MouseInputEvent mouse_event(event);
 550     if (v_scrollbar_.get() &&
 551         (mouse_event.GetPosition().y() <= 0 ||
 552          mouse_event.GetPosition().y() >= (plugin_dip_size_.height() - 1))) {
 553       v_scrollbar_->ScrollBy(
 554           PP_SCROLLBY_LINE, mouse_event.GetPosition().y() >= 0 ? 1: -1);
 555       set_timer = true;
 556     }
 557     if (h_scrollbar_.get() &&
 558         (mouse_event.GetPosition().x() <= 0 ||
 559          mouse_event.GetPosition().x() >= (plugin_dip_size_.width() - 1))) {
 560       h_scrollbar_->ScrollBy(PP_SCROLLBY_LINE,
 561           mouse_event.GetPosition().x() >= 0 ? 1: -1);
 562       set_timer = true;
 563     }
 564
 565     if (set_timer) {
 566       last_mouse_event_ = pp::MouseInputEvent(event);
 567
 568       pp::CompletionCallback callback =
 569           timer_factory_.NewCallback(&Instance::OnTimerFired);
 570       pp::Module::Get()->core()->CallOnMainThread(kDragTimerMs, callback);
 571       timer_pending_ = true;
 572     }
 573   }
 574
 575   if (event.GetType() == PP_INPUTEVENT_TYPE_KEYDOWN &&
 576       event.GetModifiers() & kDefaultKeyModifier) {
 577     pp::KeyboardInputEvent keyboard_event(event);
 578     switch (keyboard_event.GetKeyCode()) {
 579       case 'A':
 580         engine_->SelectAll();
 581         return true;
 582     }
 583   }
 584
 585   // Return true for unhandled clicks so the plugin takes focus.
 586   return (event.GetType() == PP_INPUTEVENT_TYPE_MOUSEDOWN);
 587 }
 588
 589 void Instance::DidChangeView(const pp::View& view) {
 590   pp::Rect view_rect(view.GetRect());
 591   float device_scale = 1.0f;
 592   float old_device_scale = device_scale_;
 593   if (hidpi_enabled_)
 594     device_scale = view.GetDeviceScale();
 595   pp::Size view_device_size(view_rect.width() * device_scale,
 596                             view_rect.height() * device_scale);
 597   if (view_device_size == plugin_size_ && device_scale == device_scale_)
 598     return;  // We don't care about the position, only the size.
 599
 600   image_data_ = pp::ImageData();
 601   device_scale_ = device_scale;
 602   plugin_dip_size_ = view_rect.size();
 603   plugin_size_ = view_device_size;
 604
 605   paint_manager_.SetSize(view_device_size, device_scale_);
 606
 607   image_data_ = pp::ImageData(this,
 608                               PP_IMAGEDATAFORMAT_BGRA_PREMUL,
 609                               plugin_size_,
 610                               false);
 611   if (image_data_.is_null()) {
 612     DCHECK(plugin_size_.IsEmpty());
 613     return;
 614   }
 615
 616   // View dimensions changed, disable autoscroll (if it was enabled).
 617   DisableAutoscroll();
 618
 619   OnGeometryChanged(zoom_, old_device_scale);
 620 }
 621
 622 pp::Var Instance::GetInstanceObject() {
 623   if (instance_object_.is_undefined()) {
 624     PDFScriptableObject* object = new PDFScriptableObject(this);
 625     // The pp::Var takes ownership of object here.
 626     instance_object_ = pp::VarPrivate(this, object);
 627   }
 628
 629   return instance_object_;
 630 }
 631
 632 pp::Var Instance::GetLinkAtPosition(const pp::Point& point) {
 633   pp::Point offset_point(point);
 634   ScalePoint(device_scale_, &offset_point);
 635   offset_point.set_x(offset_point.x() - available_area_.x());
 636   return engine_->GetLinkAtPosition(offset_point);
 637 }
 638
 639 pp::Var Instance::GetSelectedText(bool html) {
 640   if (html || !engine_->HasPermission(PDFEngine::PERMISSION_COPY))
 641     return pp::Var();
 642   return engine_->GetSelectedText();
 643 }
 644
 645 void Instance::InvalidateWidget(pp::Widget_Dev widget,
 646                                 const pp::Rect& dirty_rect) {
 647   if (v_scrollbar_.get() && *v_scrollbar_ == widget) {
 648     if (!image_data_.is_null())
 649       v_scrollbar_->Paint(dirty_rect.pp_rect(), &image_data_);
 650   } else if (h_scrollbar_.get() && *h_scrollbar_ == widget) {
 651     if (!image_data_.is_null())
 652       h_scrollbar_->Paint(dirty_rect.pp_rect(), &image_data_);
 653   } else {
 654     // Possible to hit this condition since sometimes the scrollbar codes posts
 655     // a task to do something later, and we could have deleted our reference in
 656     // the meantime.
 657     return;
 658   }
 659
 660   pp::Rect dirty_rect_scaled = dirty_rect;
 661   ScaleRect(device_scale_, &dirty_rect_scaled);
 662   paint_manager_.InvalidateRect(dirty_rect_scaled);
 663 }
 664
 665 void Instance::ScrollbarValueChanged(pp::Scrollbar_Dev scrollbar,
 666                                      uint32_t value) {
 667   value = GetScaled(value);
 668   if (v_scrollbar_.get() && *v_scrollbar_ == scrollbar) {
 669     engine_->ScrolledToYPosition(value);
 670     pp::Rect rc;
 671     v_scrollbar_->GetLocation(&rc);
 672     int32 doc_height = GetDocumentPixelHeight();
 673     doc_height -= GetScaled(rc.height());
 674 #ifdef ENABLE_THUMBNAILS
 675     if (thumbnails_.visible()) {
 676       thumbnails_.SetPosition(value, doc_height, true);
 677     }
 678 #endif
 679     pp::Point origin(
 680         plugin_size_.width() - page_indicator_.rect().width() -
 681             GetScaled(GetScrollbarReservedThickness()),
 682         page_indicator_.GetYPosition(value, doc_height, plugin_size_.height()));
 683     page_indicator_.MoveTo(origin, page_indicator_.visible());
 684   } else if (h_scrollbar_.get() && *h_scrollbar_ == scrollbar) {
 685     engine_->ScrolledToXPosition(value);
 686   }
 687 }
 688
 689 void Instance::ScrollbarOverlayChanged(pp::Scrollbar_Dev scrollbar,
 690                                        bool overlay) {
 691   scrollbar_reserved_thickness_ = overlay ? 0 : scrollbar_thickness_;
 692   OnGeometryChanged(zoom_, device_scale_);
 693 }
 694
 695 uint32_t Instance::QuerySupportedPrintOutputFormats() {
 696   return engine_->QuerySupportedPrintOutputFormats();
 697 }
 698
 699 int32_t Instance::PrintBegin(const PP_PrintSettings_Dev& print_settings) {
 700   // For us num_pages is always equal to the number of pages in the PDF
 701   // document irrespective of the printable area.
 702   int32_t ret = engine_->GetNumberOfPages();
 703   if (!ret)
 704     return 0;
 705
 706   uint32_t supported_formats = engine_->QuerySupportedPrintOutputFormats();
 707   if ((print_settings.format & supported_formats) == 0)
 708     return 0;
 709
 710   print_settings_.is_printing = true;
 711   print_settings_.pepper_print_settings = print_settings;
 712   engine_->PrintBegin();
 713   return ret;
 714 }
 715
 716 pp::Resource Instance::PrintPages(
 717     const PP_PrintPageNumberRange_Dev* page_ranges,
 718     uint32_t page_range_count) {
 719   if (!print_settings_.is_printing)
 720     return pp::Resource();
 721
 722   print_settings_.print_pages_called_ = true;
 723   return engine_->PrintPages(page_ranges, page_range_count,
 724                              print_settings_.pepper_print_settings);
 725 }
 726
 727 void Instance::PrintEnd() {
 728   if (print_settings_.print_pages_called_)
 729     UserMetricsRecordAction("PDF.PrintPage");
 730   print_settings_.Clear();
 731   engine_->PrintEnd();
 732 }
 733
 734 bool Instance::IsPrintScalingDisabled() {
 735   return !engine_->GetPrintScaling();
 736 }
 737
 738 bool Instance::StartFind(const std::string& text, bool case_sensitive) {
 739   engine_->StartFind(text.c_str(), case_sensitive);
 740   return true;
 741 }
 742
 743 void Instance::SelectFindResult(bool forward) {
 744   engine_->SelectFindResult(forward);
 745 }
 746
 747 void Instance::StopFind() {
 748   engine_->StopFind();
 749 }
 750
 751 void Instance::Zoom(double scale, bool text_only) {
 752   UserMetricsRecordAction("PDF.ZoomFromBrowser");
 753   SetZoom(ZOOM_SCALE, scale);
 754 }
 755
 756 void Instance::ZoomChanged(double factor) {
 757   if (full_)
 758     Zoom_Dev::ZoomChanged(factor);
 759 }
 760
 761 void Instance::OnPaint(const std::vector<pp::Rect>& paint_rects,
 762                        std::vector<PaintManager::ReadyRect>* ready,
 763                        std::vector<pp::Rect>* pending) {
 764   if (image_data_.is_null()) {
 765     DCHECK(plugin_size_.IsEmpty());
 766     return;
 767   }
 768   if (first_paint_) {
 769     first_paint_ = false;
 770     pp::Rect rect = pp::Rect(pp::Point(), plugin_size_);
 771     unsigned int color = kBackgroundColorA << 24 |
 772                          kBackgroundColorR << 16 |
 773                          kBackgroundColorG << 8 |
 774                          kBackgroundColorB;
 775     FillRect(rect, color);
 776     ready->push_back(PaintManager::ReadyRect(rect, image_data_, true));
 777     *pending = paint_rects;
 778     return;
 779   }
 780
 781   engine_->PrePaint();
 782
 783   for (size_t i = 0; i < paint_rects.size(); i++) {
 784     // Intersect with plugin area since there could be pending invalidates from
 785     // when the plugin area was larger.
 786     pp::Rect rect =
 787         paint_rects[i].Intersect(pp::Rect(pp::Point(), plugin_size_));
 788     if (rect.IsEmpty())
 789       continue;
 790
 791     pp::Rect pdf_rect = available_area_.Intersect(rect);
 792     if (!pdf_rect.IsEmpty()) {
 793       pdf_rect.Offset(available_area_.x() * -1, 0);
 794
 795       std::vector<pp::Rect> pdf_ready;
 796       std::vector<pp::Rect> pdf_pending;
 797       engine_->Paint(pdf_rect, &image_data_, &pdf_ready, &pdf_pending);
 798       for (size_t j = 0; j < pdf_ready.size(); ++j) {
 799         pdf_ready[j].Offset(available_area_.point());
 800         ready->push_back(
 801             PaintManager::ReadyRect(pdf_ready[j], image_data_, false));
 802       }
 803       for (size_t j = 0; j < pdf_pending.size(); ++j) {
 804         pdf_pending[j].Offset(available_area_.point());
 805         pending->push_back(pdf_pending[j]);
 806       }
 807     }
 808
 809     for (size_t j = 0; j < background_parts_.size(); ++j) {
 810       pp::Rect intersection = background_parts_[j].location.Intersect(rect);
 811       if (!intersection.IsEmpty()) {
 812         FillRect(intersection, background_parts_[j].color);
 813         ready->push_back(
 814             PaintManager::ReadyRect(intersection, image_data_, false));
 815       }
 816     }
 817
 818     if (document_load_state_ == LOAD_STATE_FAILED) {
 819       pp::Point top_center;
 820       top_center.set_x(plugin_size_.width() / 2);
 821       top_center.set_y(plugin_size_.height() / 2);
 822       DrawText(top_center, PP_RESOURCESTRING_PDFLOAD_FAILED);
 823     }
 824
 825 #ifdef ENABLE_THUMBNAILS
 826     thumbnails_.Paint(&image_data_, rect);
 827 #endif
 828   }
 829
 830   engine_->PostPaint();
 831
 832   // Must paint scrollbars after the background parts, in case we have an
 833   // overlay scrollbar that's over the background. We also do this in a separate
 834   // loop because the scrollbar painting logic uses the signal of whether there
 835   // are pending paints or not to figure out if it should draw right away or
 836   // not.
 837   for (size_t i = 0; i < paint_rects.size(); i++) {
 838     PaintIfWidgetIntersects(h_scrollbar_.get(), paint_rects[i], ready, pending);
 839     PaintIfWidgetIntersects(v_scrollbar_.get(), paint_rects[i], ready, pending);
 840   }
 841
 842   if (progress_bar_.visible())
 843     PaintOverlayControl(&progress_bar_, &image_data_, ready);
 844
 845   if (page_indicator_.visible())
 846     PaintOverlayControl(&page_indicator_, &image_data_, ready);
 847
 848   if (toolbar_->current_transparency() != kTransparentAlpha)
 849     PaintOverlayControl(toolbar_.get(), &image_data_, ready);
 850
 851   // Paint autoscroll anchor if needed.
 852   if (is_autoscroll_) {
 853     size_t limit = ready->size();
 854     for (size_t i = 0; i < limit; i++) {
 855       pp::Rect anchor_rect = autoscroll_rect_.Intersect((*ready)[i].rect);
 856       if (!anchor_rect.IsEmpty()) {
 857         pp::Rect draw_rc = pp::Rect(
 858             pp::Point(anchor_rect.x() - autoscroll_rect_.x(),
 859                       anchor_rect.y() - autoscroll_rect_.y()),
 860             anchor_rect.size());
 861         // Paint autoscroll anchor.
 862         AlphaBlend(autoscroll_anchor_, draw_rc,
 863                    &image_data_, anchor_rect.point(), kOpaqueAlpha);
 864       }
 865     }
 866   }
 867 }
 868
 869 void Instance::PaintOverlayControl(
 870     Control* ctrl,
 871     pp::ImageData* image_data,
 872     std::vector<PaintManager::ReadyRect>* ready) {
 873   // Make sure that we only paint overlay controls over an area that's ready,
 874   // i.e. not pending.  Otherwise we'll mark the control rect as ready and
 875   // it'll overwrite the pdf region.
 876   std::list<pp::Rect> ctrl_rects;
 877   for (size_t i = 0; i < ready->size(); i++) {
 878     pp::Rect rc = ctrl->rect().Intersect((*ready)[i].rect);
 879     if (!rc.IsEmpty())
 880       ctrl_rects.push_back(rc);
 881   }
 882
 883   if (!ctrl_rects.empty()) {
 884     ctrl->PaintMultipleRects(image_data, ctrl_rects);
 885
 886     std::list<pp::Rect>::iterator iter;
 887     for (iter = ctrl_rects.begin(); iter != ctrl_rects.end(); ++iter) {
 888       ready->push_back(PaintManager::ReadyRect(*iter, *image_data, false));
 889     }
 890   }
 891 }
 892
 893 void Instance::DidOpen(int32_t result) {
 894   if (result == PP_OK) {
 895     engine_->HandleDocumentLoad(embed_loader_);
 896   } else if (result != PP_ERROR_ABORTED) {  // Can happen in tests.
 897     NOTREACHED();
 898   }
 899 }
 900
 901 void Instance::DidOpenPreview(int32_t result) {
 902   if (result == PP_OK) {
 903     preview_engine_.reset(PDFEngine::Create(new PreviewModeClient(this)));
 904     preview_engine_->HandleDocumentLoad(embed_preview_loader_);
 905   } else {
 906     NOTREACHED();
 907   }
 908 }
 909
 910 void Instance::PaintIfWidgetIntersects(
 911     pp::Widget_Dev* widget,
 912     const pp::Rect& rect,
 913     std::vector<PaintManager::ReadyRect>* ready,
 914     std::vector<pp::Rect>* pending) {
 915   if (!widget)
 916     return;
 917
 918   pp::Rect location;
 919   if (!widget->GetLocation(&location))
 920     return;
 921
 922   ScaleRect(device_scale_, &location);
 923   location = location.Intersect(rect);
 924   if (location.IsEmpty())
 925     return;
 926
 927   if (IsOverlayScrollbar()) {
 928     // If we're using overlay scrollbars, and there are pending paints under the
 929     // scrollbar, don't update the scrollbar instantly. While it would be nice,
 930     // we would need to double buffer the plugin area in order to make this
 931     // work. This is because we'd need to always have a copy of what the pdf
 932     // under the scrollbar looks like, and additionally we couldn't paint the
 933     // pdf under the scrollbar if it's ready until we got the preceding flush.
 934     // So in practice, it would make painting slower and introduce extra buffer
 935     // copies for the general case.
 936     for (size_t i = 0; i < pending->size(); ++i) {
 937       if ((*pending)[i].Intersects(location))
 938         return;
 939     }
 940
 941     // Even if none of the pending paints are under the scrollbar, we never want
 942     // to paint it if it's over the pdf if there are other pending paints.
 943     // Otherwise different parts of the pdf plugin would display at different
 944     // scroll offsets.
 945     if (!pending->empty() && available_area_.Intersects(rect)) {
 946       pending->push_back(location);
 947       return;
 948     }
 949   }
 950
 951   pp::Rect location_dip = location;
 952   ScaleRect(1.0f / device_scale_, &location_dip);
 953
 954   DCHECK(!image_data_.is_null());
 955   widget->Paint(location_dip, &image_data_);
 956
 957   // Re-scale the rectangle from DIPs to device pixels, so we ensure that we
 958   // don't miss any pixels due to rounding outwards in ScaleRect.
 959   location = location_dip;
 960   ScaleRect(device_scale_, &location);
 961
 962   ready->push_back(PaintManager::ReadyRect(location, image_data_, true));
 963 }
 964
 965 void Instance::OnTimerFired(int32_t) {
 966   HandleInputEvent(last_mouse_event_);
 967 }
 968
 969 void Instance::OnClientTimerFired(int32_t id) {
 970   engine_->OnCallback(id);
 971 }
 972
 973 void Instance::OnControlTimerFired(int32_t,
 974                                    const uint32& control_id,
 975                                    const uint32& timer_id) {
 976   if (control_id == toolbar_->id()) {
 977     toolbar_->OnTimerFired(timer_id);
 978   } else if (control_id == progress_bar_.id()) {
 979     if (timer_id == delayed_progress_timer_id_) {
 980       if (document_load_state_ == LOAD_STATE_LOADING &&
 981           !progress_bar_.visible()) {
 982         progress_bar_.Fade(true, kProgressFadeTimeoutMs);
 983       }
 984       delayed_progress_timer_id_ = 0;
 985     } else {
 986       progress_bar_.OnTimerFired(timer_id);
 987     }
 988   } else if (control_id == kAutoScrollId) {
 989     if (is_autoscroll_) {
 990       if (autoscroll_x_ != 0 && h_scrollbar_.get()) {
 991         h_scrollbar_->ScrollBy(PP_SCROLLBY_PIXEL, autoscroll_x_);
 992       }
 993       if (autoscroll_y_ != 0 && v_scrollbar_.get()) {
 994         v_scrollbar_->ScrollBy(PP_SCROLLBY_PIXEL, autoscroll_y_);
 995       }
 996
 997       // Reschedule timer.
 998       ScheduleTimer(kAutoScrollId, kAutoScrollTimeoutMs);
 999     }
1000   } else if (control_id == kPageIndicatorId) {
1001     page_indicator_.OnTimerFired(timer_id);
1002   }
1003 #ifdef ENABLE_THUMBNAILS
1004   else if (control_id == thumbnails_.id()) {
1005     thumbnails_.OnTimerFired(timer_id);
1006   }
1007 #endif
1008 }
1009
1010 void Instance::CalculateBackgroundParts() {
1011   background_parts_.clear();
1012   int v_scrollbar_thickness =
1013       GetScaled(v_scrollbar_.get() ? GetScrollbarReservedThickness() : 0);
1014   int h_scrollbar_thickness =
1015       GetScaled(h_scrollbar_.get() ? GetScrollbarReservedThickness() : 0);
1016   int width_without_scrollbar = std::max(
1017       plugin_size_.width() - v_scrollbar_thickness, 0);
1018   int height_without_scrollbar = std::max(
1019       plugin_size_.height() - h_scrollbar_thickness, 0);
1020   int left_width = available_area_.x();
1021   int right_start = available_area_.right();
1022   int right_width = abs(width_without_scrollbar - available_area_.right());
1023   int bottom = std::min(available_area_.bottom(), height_without_scrollbar);
1024
1025   // Add the left, right, and bottom rectangles.  Note: we assume only
1026   // horizontal centering.
1027   BackgroundPart part;
1028   part.color = kBackgroundColorA << 24 |
1029                kBackgroundColorR << 16 |
1030                kBackgroundColorG << 8 |
1031                kBackgroundColorB;
1032   part.location = pp::Rect(0, 0, left_width, bottom);
1033   if (!part.location.IsEmpty())
1034     background_parts_.push_back(part);
1035   part.location = pp::Rect(right_start, 0, right_width, bottom);
1036   if (!part.location.IsEmpty())
1037     background_parts_.push_back(part);
1038   part.location = pp::Rect(
1039       0, bottom, width_without_scrollbar, height_without_scrollbar - bottom);
1040   if (!part.location.IsEmpty())
1041     background_parts_.push_back(part);
1042
1043   if (h_scrollbar_thickness
1044 #if defined(OS_MACOSX)
1045       ||
1046 #else
1047       &&
1048 #endif
1049       v_scrollbar_thickness) {
1050     part.color = 0xFFFFFFFF;
1051     part.location = pp::Rect(plugin_size_.width() - v_scrollbar_thickness,
1052                              plugin_size_.height() - h_scrollbar_thickness,
1053                              h_scrollbar_thickness,
1054                              v_scrollbar_thickness);
1055     background_parts_.push_back(part);
1056   }
1057 }
1058
1059 int Instance::GetDocumentPixelWidth() const {
1060   return static_cast<int>(ceil(document_size_.width() * zoom_ * device_scale_));
1061 }
1062
1063 int Instance::GetDocumentPixelHeight() const {
1064   return static_cast<int>(ceil(document_size_.height() *
1065                                zoom_ *
1066                                device_scale_));
1067 }
1068
1069 void Instance::FillRect(const pp::Rect& rect, unsigned int color) {
1070   DCHECK(!image_data_.is_null() || rect.IsEmpty());
1071   unsigned int* buffer_start = static_cast<unsigned int*>(image_data_.data());
1072   int stride = image_data_.stride();
1073   unsigned int* ptr = buffer_start + rect.y() * stride / 4 + rect.x();
1074   int height = rect.height();
1075   int width = rect.width();
1076   for (int y = 0; y < height; ++y) {
1077     for (int x = 0; x < width; ++x)
1078       *(ptr + x) = color;
1079     ptr += stride /4;
1080   }
1081 }
1082
1083 void Instance::DocumentSizeUpdated(const pp::Size& size) {
1084   document_size_ = size;
1085
1086   OnGeometryChanged(zoom_, device_scale_);
1087 }
1088
1089 void Instance::Invalidate(const pp::Rect& rect) {
1090   pp::Rect offset_rect(rect);
1091   offset_rect.Offset(available_area_.point());
1092   paint_manager_.InvalidateRect(offset_rect);
1093 }
1094
1095 void Instance::Scroll(const pp::Point& point) {
1096   pp::Rect scroll_area = available_area_;
1097   if (IsOverlayScrollbar()) {
1098     pp::Rect rc;
1099     if (h_scrollbar_.get()) {
1100       h_scrollbar_->GetLocation(&rc);
1101       ScaleRect(device_scale_, &rc);
1102       if (scroll_area.bottom() > rc.y()) {
1103         scroll_area.set_height(rc.y() - scroll_area.y());
1104         paint_manager_.InvalidateRect(rc);
1105       }
1106     }
1107     if (v_scrollbar_.get()) {
1108       v_scrollbar_->GetLocation(&rc);
1109       ScaleRect(device_scale_, &rc);
1110       if (scroll_area.right() > rc.x()) {
1111         scroll_area.set_width(rc.x() - scroll_area.x());
1112         paint_manager_.InvalidateRect(rc);
1113       }
1114     }
1115   }
1116   paint_manager_.ScrollRect(scroll_area, point);
1117
1118   if (toolbar_->current_transparency() != kTransparentAlpha)
1119     paint_manager_.InvalidateRect(toolbar_->GetControlsRect());
1120
1121   if (progress_bar_.visible())
1122     paint_manager_.InvalidateRect(progress_bar_.rect());
1123
1124   if (is_autoscroll_)
1125     paint_manager_.InvalidateRect(autoscroll_rect_);
1126
1127   if (show_page_indicator_) {
1128     page_indicator_.set_current_page(GetPageNumberToDisplay());
1129     page_indicator_.Splash();
1130   }
1131
1132   if (page_indicator_.visible())
1133     paint_manager_.InvalidateRect(page_indicator_.rect());
1134
1135   if (on_scroll_callback_.is_string())
1136     ExecuteScript(on_scroll_callback_);
1137 }
1138
1139 void Instance::ScrollToX(int position) {
1140   if (!h_scrollbar_.get()) {
1141     NOTREACHED();
1142     return;
1143   }
1144   int position_dip = static_cast<int>(position / device_scale_);
1145   h_scrollbar_->SetValue(position_dip);
1146 }
1147
1148 void Instance::ScrollToY(int position) {
1149   if (!v_scrollbar_.get()) {
1150     NOTREACHED();
1151     return;
1152   }
1153   int position_dip = static_cast<int>(position / device_scale_);
1154   v_scrollbar_->SetValue(ClipToRange(position_dip, 0, valid_v_range_));
1155 }
1156
1157 void Instance::ScrollToPage(int page) {
1158   if (!v_scrollbar_.get())
1159     return;
1160
1161   if (engine_->GetNumberOfPages() == 0)
1162     return;
1163
1164   int index = ClipToRange(page, 0, engine_->GetNumberOfPages() - 1);
1165   pp::Rect rect = engine_->GetPageRect(index);
1166   // If we are trying to scroll pass the last page,
1167   // scroll to the end of the last page.
1168   int position = index < page ? rect.bottom() : rect.y();
1169   ScrollToY(position * zoom_ * device_scale_);
1170 }
1171
1172 void Instance::NavigateTo(const std::string& url, bool open_in_new_tab) {
1173   std::string url_copy(url);
1174
1175   // Empty |url_copy| is ok, and will effectively be a reload.
1176   // Skip the code below so an empty URL does not turn into "http://", which
1177   // will cause GURL to fail a DCHECK.
1178   if (!url_copy.empty()) {
1179     // If there's no scheme, add http.
1180     if (url_copy.find("://") == std::string::npos &&
1181         url_copy.find("mailto:") == std::string::npos) {
1182       url_copy = std::string("http://") + url_copy;
1183     }
1184     // Make sure |url_copy| starts with a valid scheme.
1185     if (url_copy.find("http://") != 0 &&
1186         url_copy.find("https://") != 0 &&
1187         url_copy.find("ftp://") != 0 &&
1188         url_copy.find("mailto:") != 0) {
1189       return;
1190     }
1191     // Make sure |url_copy| is not only a scheme.
1192     if (url_copy == "http://" ||
1193         url_copy == "https://" ||
1194         url_copy == "ftp://" ||
1195         url_copy == "mailto:") {
1196       return;
1197     }
1198   }
1199   if (open_in_new_tab) {
1200     GetWindowObject().Call("open", url_copy);
1201   } else {
1202     GetWindowObject().GetProperty("top").GetProperty("location").
1203         SetProperty("href", url_copy);
1204   }
1205 }
1206
1207 void Instance::UpdateCursor(PP_CursorType_Dev cursor) {
1208   if (cursor == cursor_)
1209     return;
1210   cursor_ = cursor;
1211
1212   const PPB_CursorControl_Dev* cursor_interface =
1213       reinterpret_cast<const PPB_CursorControl_Dev*>(
1214       pp::Module::Get()->GetBrowserInterface(PPB_CURSOR_CONTROL_DEV_INTERFACE));
1215   if (!cursor_interface) {
1216     NOTREACHED();
1217     return;
1218   }
1219
1220   cursor_interface->SetCursor(
1221       pp_instance(), cursor_, pp::ImageData().pp_resource(), NULL);
1222 }
1223
1224 void Instance::UpdateTickMarks(const std::vector<pp::Rect>& tickmarks) {
1225   if (!v_scrollbar_.get())
1226     return;
1227
1228   float inverse_scale = 1.0f / device_scale_;
1229   std::vector<pp::Rect> scaled_tickmarks = tickmarks;
1230   for (size_t i = 0; i < scaled_tickmarks.size(); i++) {
1231     ScaleRect(inverse_scale, &scaled_tickmarks[i]);
1232   }
1233
1234   v_scrollbar_->SetTickMarks(
1235       scaled_tickmarks.empty() ? NULL : &scaled_tickmarks[0], tickmarks.size());
1236 }
1237
1238 void Instance::NotifyNumberOfFindResultsChanged(int total, bool final_result) {
1239   NumberOfFindResultsChanged(total, final_result);
1240 }
1241
1242 void Instance::NotifySelectedFindResultChanged(int current_find_index) {
1243   SelectedFindResultChanged(current_find_index);
1244 }
1245
1246 void Instance::OnEvent(uint32 control_id, uint32 event_id, void* data) {
1247   if (event_id == Button::EVENT_ID_BUTTON_CLICKED ||
1248       event_id == Button::EVENT_ID_BUTTON_STATE_CHANGED) {
1249     switch (control_id) {
1250       case kFitToPageButtonId:
1251         UserMetricsRecordAction("PDF.FitToPageButton");
1252         SetZoom(ZOOM_FIT_TO_PAGE, 0);
1253         ZoomChanged(zoom_);
1254         break;
1255       case kFitToWidthButtonId:
1256         UserMetricsRecordAction("PDF.FitToWidthButton");
1257         SetZoom(ZOOM_FIT_TO_WIDTH, 0);
1258         ZoomChanged(zoom_);
1259         break;
1260       case kZoomOutButtonId:
1261       case kZoomInButtonId:
1262         UserMetricsRecordAction(control_id == kZoomOutButtonId ?
1263             "PDF.ZoomOutButton" : "PDF.ZoomInButton");
1264         SetZoom(ZOOM_SCALE, CalculateZoom(control_id));
1265         ZoomChanged(zoom_);
1266         break;
1267       case kSaveButtonId:
1268         UserMetricsRecordAction("PDF.SaveButton");
1269         SaveAs();
1270         break;
1271       case kPrintButtonId:
1272         UserMetricsRecordAction("PDF.PrintButton");
1273         Print();
1274         break;
1275     }
1276   }
1277   if (control_id == kThumbnailsId &&
1278       event_id == ThumbnailControl::EVENT_ID_THUMBNAIL_SELECTED) {
1279     int page = *static_cast<int*>(data);
1280     pp::Rect page_rc(engine_->GetPageRect(page));
1281     ScrollToY(static_cast<int>(page_rc.y() * zoom_ * device_scale_));
1282   }
1283 }
1284
1285 void Instance::Invalidate(uint32 control_id, const pp::Rect& rc) {
1286   paint_manager_.InvalidateRect(rc);
1287 }
1288
1289 uint32 Instance::ScheduleTimer(uint32 control_id, uint32 timeout_ms) {
1290   current_timer_id_++;
1291   pp::CompletionCallback callback =
1292       timer_factory_.NewCallback(&Instance::OnControlTimerFired,
1293                                  control_id,
1294                                  current_timer_id_);
1295   pp::Module::Get()->core()->CallOnMainThread(timeout_ms, callback);
1296   return current_timer_id_;
1297 }
1298
1299 void Instance::SetEventCapture(uint32 control_id, bool set_capture) {
1300   // TODO(gene): set event capture here.
1301 }
1302
1303 void Instance::SetCursor(uint32 control_id, PP_CursorType_Dev cursor_type) {
1304   UpdateCursor(cursor_type);
1305 }
1306
1307 pp::Instance* Instance::GetInstance() {
1308   return this;
1309 }
1310
1311 void Instance::GetDocumentPassword(
1312     pp::CompletionCallbackWithOutput<pp::Var> callback) {
1313   std::string message(GetLocalizedString(PP_RESOURCESTRING_PDFGETPASSWORD));
1314   pp::Var result = pp::PDF::ModalPromptForPassword(this, message);
1315   *callback.output() = result.pp_var();
1316   callback.Run(PP_OK);
1317 }
1318
1319 void Instance::Alert(const std::string& message) {
1320   GetWindowObject().Call("alert", message);
1321 }
1322
1323 bool Instance::Confirm(const std::string& message) {
1324   pp::Var result = GetWindowObject().Call("confirm", message);
1325   return result.is_bool() ? result.AsBool() : false;
1326 }
1327
1328 std::string Instance::Prompt(const std::string& question,
1329                              const std::string& default_answer) {
1330   pp::Var result = GetWindowObject().Call("prompt", question, default_answer);
1331   return result.is_string() ? result.AsString() : std::string();
1332 }
1333
1334 std::string Instance::GetURL() {
1335   return url_;
1336 }
1337
1338 void Instance::Email(const std::string& to,
1339                      const std::string& cc,
1340                      const std::string& bcc,
1341                      const std::string& subject,
1342                      const std::string& body) {
1343   std::string javascript =
1344       "var href = 'mailto:" + net::EscapeUrlEncodedData(to, false) +
1345       "?cc=" + net::EscapeUrlEncodedData(cc, false) +
1346       "&bcc=" + net::EscapeUrlEncodedData(bcc, false) +
1347       "&subject=" + net::EscapeUrlEncodedData(subject, false) +
1348       "&body=" + net::EscapeUrlEncodedData(body, false) +
1349       "';var temp = window.open(href, '_blank', " +
1350       "'width=1,height=1');if(temp) temp.close();";
1351   ExecuteScript(javascript);
1352 }
1353
1354 void Instance::Print() {
1355   if (!printing_enabled_ ||
1356       (!engine_->HasPermission(PDFEngine::PERMISSION_PRINT_LOW_QUALITY) &&
1357        !engine_->HasPermission(PDFEngine::PERMISSION_PRINT_HIGH_QUALITY))) {
1358     return;
1359   }
1360
1361   pp::CompletionCallback callback =
1362       print_callback_factory_.NewCallback(&Instance::OnPrint);
1363   pp::Module::Get()->core()->CallOnMainThread(0, callback);
1364 }
1365
1366 void Instance::OnPrint(int32_t) {
1367   pp::PDF::Print(this);
1368 }
1369
1370 void Instance::SaveAs() {
1371   pp::PDF::SaveAs(this);
1372 }
1373
1374 void Instance::SubmitForm(const std::string& url,
1375                           const void* data,
1376                           int length) {
1377   pp::URLRequestInfo request(this);
1378   request.SetURL(url);
1379   request.SetMethod("POST");
1380   request.AppendDataToBody(reinterpret_cast<const char*>(data), length);
1381
1382   pp::CompletionCallback callback =
1383       form_factory_.NewCallback(&Instance::FormDidOpen);
1384   form_loader_ = CreateURLLoaderInternal();
1385   int rv = form_loader_.Open(request, callback);
1386   if (rv != PP_OK_COMPLETIONPENDING)
1387     callback.Run(rv);
1388 }
1389
1390 void Instance::FormDidOpen(int32_t result) {
1391   // TODO: inform the user of success/failure.
1392   if (result != PP_OK) {
1393     NOTREACHED();
1394   }
1395 }
1396
1397 std::string Instance::ShowFileSelectionDialog() {
1398   // Seems like very low priority to implement, since the pdf has no way to get
1399   // the file data anyways.  Javascript doesn't let you do this synchronously.
1400   NOTREACHED();
1401   return std::string();
1402 }
1403
1404 pp::URLLoader Instance::CreateURLLoader() {
1405   if (full_) {
1406     if (!did_call_start_loading_) {
1407       did_call_start_loading_ = true;
1408       pp::PDF::DidStartLoading(this);
1409     }
1410
1411     // Disable save and print until the document is fully loaded, since they
1412     // would generate an incomplete document.  Need to do this each time we
1413     // call DidStartLoading since that resets the content restrictions.
1414     pp::PDF::SetContentRestriction(this, CONTENT_RESTRICTION_SAVE |
1415                                    CONTENT_RESTRICTION_PRINT);
1416   }
1417
1418   return CreateURLLoaderInternal();
1419 }
1420
1421 void Instance::ScheduleCallback(int id, int delay_in_ms) {
1422   pp::CompletionCallback callback =
1423       timer_factory_.NewCallback(&Instance::OnClientTimerFired);
1424   pp::Module::Get()->core()->CallOnMainThread(delay_in_ms, callback, id);
1425 }
1426
1427 void Instance::SearchString(const base::char16* string,
1428                             const base::char16* term,
1429                             bool case_sensitive,
1430                             std::vector<SearchStringResult>* results) {
1431   if (!pp::PDF::IsAvailable()) {
1432     NOTREACHED();
1433     return;
1434   }
1435
1436   PP_PrivateFindResult* pp_results;
1437   int count = 0;
1438   pp::PDF::SearchString(
1439       this,
1440       reinterpret_cast<const unsigned short*>(string),
1441       reinterpret_cast<const unsigned short*>(term),
1442       case_sensitive,
1443       &pp_results,
1444       &count);
1445
1446   results->resize(count);
1447   for (int i = 0; i < count; ++i) {
1448     (*results)[i].start_index = pp_results[i].start_index;
1449     (*results)[i].length = pp_results[i].length;
1450   }
1451
1452   pp::Memory_Dev memory;
1453   memory.MemFree(pp_results);
1454 }
1455
1456 void Instance::DocumentPaintOccurred() {
1457   if (painted_first_page_)
1458     return;
1459
1460   painted_first_page_ = true;
1461   UpdateToolbarPosition(false);
1462   toolbar_->Splash(kToolbarSplashTimeoutMs);
1463
1464   if (engine_->GetNumberOfPages() > 1)
1465     show_page_indicator_ = true;
1466   else
1467     show_page_indicator_ = false;
1468
1469   if (v_scrollbar_.get() && show_page_indicator_) {
1470     page_indicator_.set_current_page(GetPageNumberToDisplay());
1471     page_indicator_.Splash(kToolbarSplashTimeoutMs,
1472                            kPageIndicatorInitialFadeTimeoutMs);
1473   }
1474 }
1475
1476 void Instance::DocumentLoadComplete(int page_count) {
1477   // Clear focus state for OSK.
1478   FormTextFieldFocusChange(false);
1479
1480   // Update progress control.
1481   if (progress_bar_.visible())
1482     progress_bar_.Fade(false, kProgressFadeTimeoutMs);
1483
1484   DCHECK(document_load_state_ == LOAD_STATE_LOADING);
1485   document_load_state_ = LOAD_STATE_COMPLETE;
1486   UserMetricsRecordAction("PDF.LoadSuccess");
1487   if (on_load_callback_.is_string())
1488     ExecuteScript(on_load_callback_);
1489   // Note: If we are in print preview mode on_load_callback_ might call
1490   // ScrollTo{X|Y}() and we don't want to scroll again and override it.
1491   // #page=N is not supported in Print Preview.
1492   if (!IsPrintPreview()) {
1493     int initial_page = GetInitialPage(url_);
1494     if (initial_page >= 0)
1495       ScrollToPage(initial_page);
1496   }
1497
1498   if (!full_)
1499     return;
1500   if (!pp::PDF::IsAvailable())
1501     return;
1502
1503   if (did_call_start_loading_) {
1504     pp::PDF::DidStopLoading(this);
1505     did_call_start_loading_ = false;
1506   }
1507
1508   int content_restrictions =
1509       CONTENT_RESTRICTION_CUT | CONTENT_RESTRICTION_PASTE;
1510   if (!engine_->HasPermission(PDFEngine::PERMISSION_COPY))
1511     content_restrictions |= CONTENT_RESTRICTION_COPY;
1512
1513   if (!engine_->HasPermission(PDFEngine::PERMISSION_PRINT_LOW_QUALITY) &&
1514       !engine_->HasPermission(PDFEngine::PERMISSION_PRINT_HIGH_QUALITY)) {
1515     printing_enabled_ = false;
1516     if (current_tb_info_ == kPDFToolbarButtons) {
1517       // Remove Print button.
1518       CreateToolbar(kPDFNoPrintToolbarButtons,
1519                     arraysize(kPDFNoPrintToolbarButtons));
1520       UpdateToolbarPosition(false);
1521       Invalidate(pp::Rect(plugin_size_));
1522     }
1523   }
1524
1525   pp::PDF::SetContentRestriction(this, content_restrictions);
1526
1527   pp::PDF::HistogramPDFPageCount(this, page_count);
1528 }
1529
1530 void Instance::RotateClockwise() {
1531   engine_->RotateClockwise();
1532 }
1533
1534 void Instance::RotateCounterclockwise() {
1535   engine_->RotateCounterclockwise();
1536 }
1537
1538 void Instance::PreviewDocumentLoadComplete() {
1539   if (preview_document_load_state_ != LOAD_STATE_LOADING ||
1540       preview_pages_info_.empty()) {
1541     return;
1542   }
1543
1544   preview_document_load_state_ = LOAD_STATE_COMPLETE;
1545
1546   int dest_page_index = preview_pages_info_.front().second;
1547   int src_page_index =
1548       ExtractPrintPreviewPageIndex(preview_pages_info_.front().first);
1549   if (src_page_index > 0 &&  dest_page_index > -1 && preview_engine_.get())
1550     engine_->AppendPage(preview_engine_.get(), dest_page_index);
1551
1552   preview_pages_info_.pop();
1553   // |print_preview_page_count_| is not updated yet. Do not load any
1554   // other preview pages till we get this information.
1555   if (print_preview_page_count_ == 0)
1556     return;
1557
1558   if (preview_pages_info_.size())
1559     LoadAvailablePreviewPage();
1560 }
1561
1562 void Instance::DocumentLoadFailed() {
1563   DCHECK(document_load_state_ == LOAD_STATE_LOADING);
1564   UserMetricsRecordAction("PDF.LoadFailure");
1565
1566   // Hide progress control.
1567   progress_bar_.Fade(false, kProgressFadeTimeoutMs);
1568
1569   if (did_call_start_loading_) {
1570     pp::PDF::DidStopLoading(this);
1571     did_call_start_loading_ = false;
1572   }
1573
1574   document_load_state_ = LOAD_STATE_FAILED;
1575   paint_manager_.InvalidateRect(pp::Rect(pp::Point(), plugin_size_));
1576 }
1577
1578 void Instance::PreviewDocumentLoadFailed() {
1579   UserMetricsRecordAction("PDF.PreviewDocumentLoadFailure");
1580   if (preview_document_load_state_ != LOAD_STATE_LOADING ||
1581       preview_pages_info_.empty()) {
1582     return;
1583   }
1584
1585   preview_document_load_state_ = LOAD_STATE_FAILED;
1586   preview_pages_info_.pop();
1587
1588   if (preview_pages_info_.size())
1589     LoadAvailablePreviewPage();
1590 }
1591
1592 pp::Instance* Instance::GetPluginInstance() {
1593   return GetInstance();
1594 }
1595
1596 void Instance::DocumentHasUnsupportedFeature(const std::string& feature) {
1597   std::string metric("PDF_Unsupported_");
1598   metric += feature;
1599   if (!unsupported_features_reported_.count(metric)) {
1600     unsupported_features_reported_.insert(metric);
1601     UserMetricsRecordAction(metric);
1602   }
1603
1604   // Since we use an info bar, only do this for full frame plugins..
1605   if (!full_)
1606     return;
1607
1608   if (told_browser_about_unsupported_feature_)
1609     return;
1610   told_browser_about_unsupported_feature_ = true;
1611
1612   pp::PDF::HasUnsupportedFeature(this);
1613 }
1614
1615 void Instance::DocumentLoadProgress(uint32 available, uint32 doc_size) {
1616   double progress = 0.0;
1617   if (doc_size == 0) {
1618     // Document size is unknown. Use heuristics.
1619     // We'll make progress logarithmic from 0 to 100M.
1620     static const double kFactor = log(100000000.0) / 100.0;
1621     if (available > 0) {
1622       progress = log(static_cast<double>(available)) / kFactor;
1623       if (progress > 100.0)
1624         progress = 100.0;
1625     }
1626   } else {
1627     progress = 100.0 * static_cast<double>(available) / doc_size;
1628   }
1629   progress_bar_.SetProgress(progress);
1630 }
1631
1632 void Instance::FormTextFieldFocusChange(bool in_focus) {
1633   if (!text_input_.get())
1634     return;
1635   if (in_focus)
1636     text_input_->SetTextInputType(PP_TEXTINPUT_TYPE_DEV_TEXT);
1637   else
1638     text_input_->SetTextInputType(PP_TEXTINPUT_TYPE_DEV_NONE);
1639 }
1640
1641 // Called by PDFScriptableObject.
1642 bool Instance::HasScriptableMethod(const pp::Var& method, pp::Var* exception) {
1643   std::string method_str = method.AsString();
1644   return (method_str == kJSAccessibility ||
1645           method_str == kJSDocumentLoadComplete ||
1646           method_str == kJSGetHeight ||
1647           method_str == kJSGetHorizontalScrollbarThickness ||
1648           method_str == kJSGetPageLocationNormalized ||
1649           method_str == kJSGetVerticalScrollbarThickness ||
1650           method_str == kJSGetWidth ||
1651           method_str == kJSGetZoomLevel ||
1652           method_str == kJSGoToPage ||
1653           method_str == kJSGrayscale ||
1654           method_str == kJSLoadPreviewPage ||
1655           method_str == kJSOnLoad ||
1656           method_str == kJSOnPluginSizeChanged ||
1657           method_str == kJSOnScroll ||
1658           method_str == kJSPageXOffset ||
1659           method_str == kJSPageYOffset ||
1660           method_str == kJSPrintPreviewPageCount ||
1661           method_str == kJSReload ||
1662           method_str == kJSRemovePrintButton ||
1663           method_str == kJSResetPrintPreviewUrl ||
1664           method_str == kJSSendKeyEvent ||
1665           method_str == kJSSetPageNumbers ||
1666           method_str == kJSSetPageXOffset ||
1667           method_str == kJSSetPageYOffset ||
1668           method_str == kJSSetZoomLevel ||
1669           method_str == kJSZoomFitToHeight ||
1670           method_str == kJSZoomFitToWidth ||
1671           method_str == kJSZoomIn ||
1672           method_str == kJSZoomOut);
1673 }
1674
1675 pp::Var Instance::CallScriptableMethod(const pp::Var& method,
1676                                        const std::vector<pp::Var>& args,
1677                                        pp::Var* exception) {
1678   std::string method_str = method.AsString();
1679   if (method_str == kJSGrayscale) {
1680     if (args.size() == 1 && args[0].is_bool()) {
1681       engine_->SetGrayscale(args[0].AsBool());
1682       // Redraw
1683       paint_manager_.InvalidateRect(pp::Rect(pp::Point(), plugin_size_));
1684 #ifdef ENABLE_THUMBNAILS
1685       if (thumbnails_.visible())
1686         thumbnails_.Show(true, true);
1687 #endif
1688       return pp::Var(true);
1689     }
1690     return pp::Var(false);
1691   }
1692   if (method_str == kJSOnLoad) {
1693     if (args.size() == 1 && args[0].is_string()) {
1694       on_load_callback_ = args[0];
1695       return pp::Var(true);
1696     }
1697     return pp::Var(false);
1698   }
1699   if (method_str == kJSOnScroll) {
1700     if (args.size() == 1 && args[0].is_string()) {
1701       on_scroll_callback_ = args[0];
1702       return pp::Var(true);
1703     }
1704     return pp::Var(false);
1705   }
1706   if (method_str == kJSOnPluginSizeChanged) {
1707     if (args.size() == 1 && args[0].is_string()) {
1708       on_plugin_size_changed_callback_ = args[0];
1709       return pp::Var(true);
1710     }
1711     return pp::Var(false);
1712   }
1713   if (method_str == kJSReload) {
1714     document_load_state_ = LOAD_STATE_LOADING;
1715     if (!full_)
1716       LoadUrl(url_);
1717     preview_engine_.reset();
1718     print_preview_page_count_ = 0;
1719     engine_.reset(PDFEngine::Create(this));
1720     engine_->New(url_.c_str());
1721 #ifdef ENABLE_THUMBNAILS
1722     thumbnails_.ResetEngine(engine_.get());
1723 #endif
1724     return pp::Var();
1725   }
1726   if (method_str == kJSResetPrintPreviewUrl) {
1727     if (args.size() == 1 && args[0].is_string()) {
1728       url_ = args[0].AsString();
1729       preview_pages_info_ = std::queue<PreviewPageInfo>();
1730       preview_document_load_state_ = LOAD_STATE_COMPLETE;
1731     }
1732     return pp::Var();
1733   }
1734   if (method_str == kJSZoomFitToHeight) {
1735     SetZoom(ZOOM_FIT_TO_PAGE, 0);
1736     return pp::Var();
1737   }
1738   if (method_str == kJSZoomFitToWidth) {
1739     SetZoom(ZOOM_FIT_TO_WIDTH, 0);
1740     return pp::Var();
1741   }
1742   if (method_str == kJSZoomIn) {
1743     SetZoom(ZOOM_SCALE, CalculateZoom(kZoomInButtonId));
1744     return pp::Var();
1745   }
1746   if (method_str == kJSZoomOut) {
1747     SetZoom(ZOOM_SCALE, CalculateZoom(kZoomOutButtonId));
1748     return pp::Var();
1749   }
1750   if (method_str == kJSSetZoomLevel) {
1751     if (args.size() == 1 && args[0].is_double())
1752       SetZoom(ZOOM_SCALE, args[0].AsDouble());
1753     return pp::Var();
1754   }
1755   if (method_str == kJSGetZoomLevel) {
1756     return pp::Var(zoom_);
1757   }
1758   if (method_str == kJSGetHeight) {
1759     return pp::Var(plugin_size_.height());
1760   }
1761   if (method_str == kJSGetWidth) {
1762     return pp::Var(plugin_size_.width());
1763   }
1764   if (method_str == kJSGetHorizontalScrollbarThickness) {
1765     return pp::Var(
1766           h_scrollbar_.get() ? GetScrollbarReservedThickness() : 0);
1767   }
1768   if (method_str == kJSGetVerticalScrollbarThickness) {
1769     return pp::Var(
1770           v_scrollbar_.get() ? GetScrollbarReservedThickness() : 0);
1771   }
1772   if (method_str == kJSDocumentLoadComplete) {
1773     return pp::Var((document_load_state_ != LOAD_STATE_LOADING));
1774   }
1775   if (method_str == kJSPageYOffset) {
1776     return pp::Var(static_cast<int32_t>(
1777         v_scrollbar_.get() ? v_scrollbar_->GetValue() : 0));
1778   }
1779   if (method_str == kJSSetPageYOffset) {
1780     if (args.size() == 1 && args[0].is_number() && v_scrollbar_.get())
1781       ScrollToY(GetScaled(args[0].AsInt()));
1782     return pp::Var();
1783   }
1784   if (method_str == kJSPageXOffset) {
1785     return pp::Var(static_cast<int32_t>(
1786         h_scrollbar_.get() ? h_scrollbar_->GetValue() : 0));
1787   }
1788   if (method_str == kJSSetPageXOffset) {
1789     if (args.size() == 1 && args[0].is_number() && h_scrollbar_.get())
1790       ScrollToX(GetScaled(args[0].AsInt()));
1791     return pp::Var();
1792   }
1793   if (method_str == kJSRemovePrintButton) {
1794     CreateToolbar(kPrintPreviewToolbarButtons,
1795                   arraysize(kPrintPreviewToolbarButtons));
1796     UpdateToolbarPosition(false);
1797     Invalidate(pp::Rect(plugin_size_));
1798     return pp::Var();
1799   }
1800   if (method_str == kJSGoToPage) {
1801     if (args.size() == 1 && args[0].is_string()) {
1802       ScrollToPage(atoi(args[0].AsString().c_str()));
1803     }
1804     return pp::Var();
1805   }
1806   if (method_str == kJSAccessibility) {
1807     if (args.size() == 0) {
1808       base::DictionaryValue node;
1809       node.SetInteger(kAccessibleNumberOfPages, engine_->GetNumberOfPages());
1810       node.SetBoolean(kAccessibleLoaded,
1811                       document_load_state_ != LOAD_STATE_LOADING);
1812       bool has_permissions =
1813           engine_->HasPermission(PDFEngine::PERMISSION_COPY) ||
1814           engine_->HasPermission(PDFEngine::PERMISSION_COPY_ACCESSIBLE);
1815       node.SetBoolean(kAccessibleCopyable, has_permissions);
1816       std::string json;
1817       base::JSONWriter::Write(&node, &json);
1818       return pp::Var(json);
1819     } else if (args[0].is_number()) {
1820       return pp::Var(engine_->GetPageAsJSON(args[0].AsInt()));
1821     }
1822   }
1823   if (method_str == kJSPrintPreviewPageCount) {
1824     if (args.size() == 1 && args[0].is_number())
1825       SetPrintPreviewMode(args[0].AsInt());
1826     return pp::Var();
1827   }
1828   if (method_str == kJSLoadPreviewPage) {
1829     if (args.size() == 2 && args[0].is_string() && args[1].is_number())
1830       ProcessPreviewPageInfo(args[0].AsString(), args[1].AsInt());
1831     return pp::Var();
1832   }
1833   if (method_str == kJSGetPageLocationNormalized) {
1834     const size_t kMaxLength = 30;
1835     char location_info[kMaxLength];
1836     int page_idx = engine_->GetMostVisiblePage();
1837     if (page_idx < 0)
1838       return pp::Var(std::string());
1839     pp::Rect rect = engine_->GetPageContentsRect(page_idx);
1840     int v_scrollbar_reserved_thickness =
1841         v_scrollbar_.get() ? GetScaled(GetScrollbarReservedThickness()) : 0;
1842
1843     rect.set_x(rect.x() + ((plugin_size_.width() -
1844         v_scrollbar_reserved_thickness - available_area_.width()) / 2));
1845     base::snprintf(location_info,
1846                    kMaxLength,
1847                    "%0.4f;%0.4f;%0.4f;%0.4f;",
1848                    rect.x() / static_cast<float>(plugin_size_.width()),
1849                    rect.y() / static_cast<float>(plugin_size_.height()),
1850                    rect.width() / static_cast<float>(plugin_size_.width()),
1851                    rect.height()/ static_cast<float>(plugin_size_.height()));
1852     return pp::Var(std::string(location_info));
1853   }
1854   if (method_str == kJSSetPageNumbers) {
1855     if (args.size() != 1 || !args[0].is_string())
1856       return pp::Var();
1857     const int num_pages_signed = engine_->GetNumberOfPages();
1858     if (num_pages_signed <= 0)
1859       return pp::Var();
1860     scoped_ptr<base::ListValue> page_ranges(static_cast<base::ListValue*>(
1861         base::JSONReader::Read(args[0].AsString(), false)));
1862     const size_t num_pages = static_cast<size_t>(num_pages_signed);
1863     if (!page_ranges.get() || page_ranges->GetSize() != num_pages)
1864       return pp::Var();
1865
1866     std::vector<int> print_preview_page_numbers;
1867     for (size_t index = 0; index < num_pages; ++index) {
1868       int page_number = 0;  // |page_number| is 1-based.
1869       if (!page_ranges->GetInteger(index, &page_number) || page_number < 1)
1870         return pp::Var();
1871       print_preview_page_numbers.push_back(page_number);
1872     }
1873     print_preview_page_numbers_ = print_preview_page_numbers;
1874     page_indicator_.set_current_page(GetPageNumberToDisplay());
1875     return pp::Var();
1876   }
1877   // This is here to work around https://bugs.webkit.org/show_bug.cgi?id=16735.
1878   // In JS, creating a synthetic keyboard event and dispatching it always
1879   // result in a keycode of 0.
1880   if (method_str == kJSSendKeyEvent) {
1881     if (args.size() == 1 && args[0].is_number()) {
1882       pp::KeyboardInputEvent event(
1883           this,                        // instance
1884           PP_INPUTEVENT_TYPE_KEYDOWN,  // HandleInputEvent only care about this.
1885           0,                           // timestamp, not used for kbd events.
1886           0,                           // no modifiers.
1887           args[0].AsInt(),             // keycode.
1888           pp::Var());                  // no char text needed.
1889       HandleInputEvent(event);
1890     }
1891   }
1892   return pp::Var();
1893 }
1894
1895 void Instance::OnGeometryChanged(double old_zoom, float old_device_scale) {
1896   bool force_no_horizontal_scrollbar = false;
1897   int scrollbar_thickness = GetScrollbarThickness();
1898
1899   if (old_device_scale != device_scale_) {
1900     // Change in device scale forces us to recreate resources
1901     ConfigureNumberImageGenerator();
1902
1903     CreateToolbar(current_tb_info_, current_tb_info_size_);
1904     // Load autoscroll anchor image.
1905     autoscroll_anchor_ =
1906         CreateResourceImage(PP_RESOURCEIMAGE_PDF_PAN_SCROLL_ICON);
1907
1908     ConfigurePageIndicator();
1909     ConfigureProgressBar();
1910
1911     pp::Point scroll_position = engine_->GetScrollPosition();
1912     ScalePoint(device_scale_ / old_device_scale, &scroll_position);
1913     engine_->SetScrollPosition(scroll_position);
1914   }
1915
1916   UpdateZoomScale();
1917   if (zoom_ != old_zoom || device_scale_ != old_device_scale)
1918     engine_->ZoomUpdated(zoom_ * device_scale_);
1919   if (zoom_ != old_zoom)
1920     ZoomChanged(zoom_);
1921
1922   available_area_ = pp::Rect(plugin_size_);
1923   if (GetDocumentPixelHeight() > plugin_size_.height()) {
1924     CreateVerticalScrollbar();
1925   } else {
1926     DestroyVerticalScrollbar();
1927   }
1928
1929   int v_scrollbar_reserved_thickness =
1930       v_scrollbar_.get() ? GetScaled(GetScrollbarReservedThickness()) : 0;
1931
1932   if (!force_no_horizontal_scrollbar &&
1933       GetDocumentPixelWidth() >
1934       (plugin_size_.width() - v_scrollbar_reserved_thickness)) {
1935     CreateHorizontalScrollbar();
1936
1937     // Adding the horizontal scrollbar now might cause us to need vertical
1938     // scrollbars.
1939     if (GetDocumentPixelHeight() >
1940         plugin_size_.height() - GetScaled(GetScrollbarReservedThickness())) {
1941       CreateVerticalScrollbar();
1942     }
1943
1944   } else {
1945     DestroyHorizontalScrollbar();
1946   }
1947
1948 #ifdef ENABLE_THUMBNAILS
1949   int thumbnails_pos = 0, thumbnails_total = 0;
1950 #endif
1951   if (v_scrollbar_.get()) {
1952     v_scrollbar_->SetScale(device_scale_);
1953     available_area_.set_width(
1954       std::max(0, plugin_size_.width() - v_scrollbar_reserved_thickness));
1955
1956 #ifdef ENABLE_THUMBNAILS
1957     int height = plugin_size_.height();
1958 #endif
1959     int height_dip = plugin_dip_size_.height();
1960
1961 #if defined(OS_MACOSX)
1962     // Before Lion, Mac always had the resize at the bottom. After that, it
1963     // never did.
1964     if ((base::mac::IsOSSnowLeopard() && full_) ||
1965         (base::mac::IsOSLionOrLater() && h_scrollbar_.get())) {
1966 #else
1967     if (h_scrollbar_.get()) {
1968 #endif  // defined(OS_MACOSX)
1969 #ifdef ENABLE_THUMBNAILS
1970       height -= GetScaled(GetScrollbarThickness());
1971 #endif
1972       height_dip -= GetScrollbarThickness();
1973     }
1974 #ifdef ENABLE_THUMBNAILS
1975     int32 doc_height = GetDocumentPixelHeight();
1976 #endif
1977     int32 doc_height_dip =
1978         static_cast<int32>(GetDocumentPixelHeight() / device_scale_);
1979 #if defined(OS_MACOSX)
1980     // On the Mac we always allow room for the resize button (whose width is
1981     // the same as that of the scrollbar) in full mode. However, if there is no
1982     // no horizontal scrollbar, the end of the scrollbar will scroll past the
1983     // end of the document. This is because the scrollbar assumes that its own
1984     // height (in the case of a vscroll bar) is the same as the height of the
1985     // viewport. Since the viewport is actually larger, we compensate by
1986     // adjusting the document height. Similar logic applies below for the
1987     // horizontal scrollbar.
1988     // For example, if the document size is 1000, and the viewport size is 200,
1989     // then the scrollbar position at the end will be 800. In this case the
1990     // viewport is actally 215 (assuming 15 as the scrollbar width) but the
1991     // scrollbar thinks it is 200. We want the scrollbar position at the end to
1992     // be 785. Making the document size 985 achieves this.
1993     if (full_ && !h_scrollbar_.get()) {
1994 #ifdef ENABLE_THUMBNAILS
1995       doc_height -= GetScaled(GetScrollbarThickness());
1996 #endif
1997       doc_height_dip -= GetScrollbarThickness();
1998     }
1999 #endif  // defined(OS_MACOSX)
2000
2001     int32 position;
2002     position = v_scrollbar_->GetValue();
2003     position = static_cast<int>(position * zoom_ / old_zoom);
2004     valid_v_range_ = doc_height_dip - height_dip;
2005     if (position > valid_v_range_)
2006       position = valid_v_range_;
2007
2008     v_scrollbar_->SetValue(position);
2009
2010     PP_Rect loc;
2011     loc.point.x = static_cast<int>(available_area_.right() / device_scale_);
2012     if (IsOverlayScrollbar())
2013       loc.point.x -= scrollbar_thickness;
2014     loc.point.y = 0;
2015     loc.size.width = scrollbar_thickness;
2016     loc.size.height = height_dip;
2017     v_scrollbar_->SetLocation(loc);
2018     v_scrollbar_->SetDocumentSize(doc_height_dip);
2019
2020 #ifdef ENABLE_THUMBNAILS
2021     thumbnails_pos = position;
2022     thumbnails_total = doc_height - height;
2023 #endif
2024   }
2025
2026   if (h_scrollbar_.get()) {
2027     h_scrollbar_->SetScale(device_scale_);
2028     available_area_.set_height(
2029         std::max(0, plugin_size_.height() -
2030                     GetScaled(GetScrollbarReservedThickness())));
2031
2032     int width_dip = plugin_dip_size_.width();
2033
2034     // See note above.
2035 #if defined(OS_MACOSX)
2036     if ((base::mac::IsOSSnowLeopard() && full_) ||
2037         (base::mac::IsOSLionOrLater() && v_scrollbar_.get())) {
2038 #else
2039     if (v_scrollbar_.get()) {
2040 #endif
2041       width_dip -= GetScrollbarThickness();
2042     }
2043     int32 doc_width_dip =
2044         static_cast<int32>(GetDocumentPixelWidth() / device_scale_);
2045 #if defined(OS_MACOSX)
2046     // See comment in the above if (v_scrollbar_.get()) block.
2047     if (full_ && !v_scrollbar_.get())
2048       doc_width_dip -= GetScrollbarThickness();
2049 #endif  // defined(OS_MACOSX)
2050
2051     int32 position;
2052     position = h_scrollbar_->GetValue();
2053     position = static_cast<int>(position * zoom_ / old_zoom);
2054     position = std::min(position, doc_width_dip - width_dip);
2055
2056     h_scrollbar_->SetValue(position);
2057
2058     PP_Rect loc;
2059     loc.point.x = 0;
2060     loc.point.y = static_cast<int>(available_area_.bottom() / device_scale_);
2061     if (IsOverlayScrollbar())
2062       loc.point.y -= scrollbar_thickness;
2063     loc.size.width = width_dip;
2064     loc.size.height = scrollbar_thickness;
2065     h_scrollbar_->SetLocation(loc);
2066     h_scrollbar_->SetDocumentSize(doc_width_dip);
2067   }
2068
2069   int doc_width = GetDocumentPixelWidth();
2070   if (doc_width < available_area_.width()) {
2071     available_area_.Offset((available_area_.width() - doc_width) / 2, 0);
2072     available_area_.set_width(doc_width);
2073   }
2074   int doc_height = GetDocumentPixelHeight();
2075   if (doc_height < available_area_.height()) {
2076     available_area_.set_height(doc_height);
2077   }
2078
2079   // We'll invalidate the entire plugin anyways.
2080   UpdateToolbarPosition(false);
2081   UpdateProgressBarPosition(false);
2082   UpdatePageIndicatorPosition(false);
2083
2084 #ifdef ENABLE_THUMBNAILS
2085   // Update thumbnail control position.
2086   thumbnails_.SetPosition(thumbnails_pos, thumbnails_total, false);
2087   pp::Rect thumbnails_rc(plugin_size_.width() - GetScaled(kThumbnailsWidth), 0,
2088     GetScaled(kThumbnailsWidth), plugin_size_.height());
2089   if (v_scrollbar_.get())
2090     thumbnails_rc.Offset(-v_scrollbar_reserved_thickness, 0);
2091   if (h_scrollbar_.get())
2092     thumbnails_rc.Inset(0, 0, 0, v_scrollbar_reserved_thickness);
2093   thumbnails_.SetRect(thumbnails_rc, false);
2094 #endif
2095
2096   CalculateBackgroundParts();
2097   engine_->PageOffsetUpdated(available_area_.point());
2098   engine_->PluginSizeUpdated(available_area_.size());
2099
2100   if (!document_size_.GetArea())
2101     return;
2102   paint_manager_.InvalidateRect(pp::Rect(pp::Point(), plugin_size_));
2103
2104   if (on_plugin_size_changed_callback_.is_string())
2105     ExecuteScript(on_plugin_size_changed_callback_);
2106 }
2107
2108 void Instance::CreateHorizontalScrollbar() {
2109   if (h_scrollbar_.get())
2110     return;
2111
2112   h_scrollbar_.reset(new pp::Scrollbar_Dev(this, false));
2113 }
2114
2115 void Instance::CreateVerticalScrollbar() {
2116   if (v_scrollbar_.get())
2117     return;
2118
2119   v_scrollbar_.reset(new pp::Scrollbar_Dev(this, true));
2120 }
2121
2122 void Instance::DestroyHorizontalScrollbar() {
2123   if (!h_scrollbar_.get())
2124     return;
2125   if (h_scrollbar_->GetValue())
2126     engine_->ScrolledToXPosition(0);
2127   h_scrollbar_.reset();
2128 }
2129
2130 void Instance::DestroyVerticalScrollbar() {
2131   if (!v_scrollbar_.get())
2132     return;
2133   if (v_scrollbar_->GetValue())
2134     engine_->ScrolledToYPosition(0);
2135   v_scrollbar_.reset();
2136   page_indicator_.Show(false, true);
2137 }
2138
2139 int Instance::GetScrollbarThickness() {
2140   if (scrollbar_thickness_ == -1) {
2141     pp::Scrollbar_Dev temp_scrollbar(this, false);
2142     scrollbar_thickness_ = temp_scrollbar.GetThickness();
2143     scrollbar_reserved_thickness_ =
2144       temp_scrollbar.IsOverlay() ? 0 : scrollbar_thickness_;
2145   }
2146
2147   return scrollbar_thickness_;
2148 }
2149
2150 int Instance::GetScrollbarReservedThickness() {
2151   GetScrollbarThickness();
2152   return scrollbar_reserved_thickness_;
2153 }
2154
2155 bool Instance::IsOverlayScrollbar() {
2156   return GetScrollbarReservedThickness() == 0;
2157 }
2158
2159 void Instance::CreateToolbar(const ToolbarButtonInfo* tb_info, size_t size) {
2160   toolbar_.reset(new FadingControls());
2161
2162   DCHECK(tb_info);
2163   DCHECK(size >= 0);
2164
2165   // Remember the current toolbar information in case we need to recreate the
2166   // images later.
2167   current_tb_info_ = tb_info;
2168   current_tb_info_size_ = size;
2169
2170   int max_height = 0;
2171   pp::Point origin(kToolbarFadingOffsetLeft, kToolbarFadingOffsetTop);
2172   ScalePoint(device_scale_, &origin);
2173
2174   std::list<Button*> buttons;
2175   for (size_t i = 0; i < size; i++) {
2176     Button* btn = new Button;
2177     pp::ImageData normal_face =
2178         CreateResourceImage(tb_info[i].normal);
2179     btn->CreateButton(tb_info[i].id,
2180                       origin,
2181                       true,
2182                       toolbar_.get(),
2183                       tb_info[i].style,
2184                       normal_face,
2185                       CreateResourceImage(tb_info[i].highlighted),
2186                       CreateResourceImage(tb_info[i].pressed));
2187     buttons.push_back(btn);
2188
2189     origin += pp::Point(normal_face.size().width(), 0);
2190     max_height = std::max(max_height, normal_face.size().height());
2191   }
2192
2193   pp::Rect rc_toolbar(0, 0,
2194       origin.x() + GetToolbarRightOffset(),
2195       origin.y() + max_height + GetToolbarBottomOffset());
2196   toolbar_->CreateFadingControls(
2197       kToolbarId, rc_toolbar, false, this, kTransparentAlpha);
2198
2199   std::list<Button*>::iterator iter;
2200   for (iter = buttons.begin(); iter != buttons.end(); ++iter) {
2201     toolbar_->AddControl(*iter);
2202   }
2203 }
2204
2205 int Instance::GetToolbarRightOffset() {
2206   int scrollbar_thickness = GetScrollbarThickness();
2207   return GetScaled(kToolbarFadingOffsetRight) + 2 * scrollbar_thickness;
2208 }
2209
2210 int Instance::GetToolbarBottomOffset() {
2211   int scrollbar_thickness = GetScrollbarThickness();
2212   return GetScaled(kToolbarFadingOffsetBottom) + scrollbar_thickness;
2213 }
2214
2215 std::vector<pp::ImageData> Instance::GetThumbnailResources() {
2216   std::vector<pp::ImageData> num_images(10);
2217   num_images[0] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_BUTTON_THUMBNAIL_0);
2218   num_images[1] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_BUTTON_THUMBNAIL_1);
2219   num_images[2] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_BUTTON_THUMBNAIL_2);
2220   num_images[3] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_BUTTON_THUMBNAIL_3);
2221   num_images[4] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_BUTTON_THUMBNAIL_4);
2222   num_images[5] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_BUTTON_THUMBNAIL_5);
2223   num_images[6] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_BUTTON_THUMBNAIL_6);
2224   num_images[7] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_BUTTON_THUMBNAIL_7);
2225   num_images[8] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_BUTTON_THUMBNAIL_8);
2226   num_images[9] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_BUTTON_THUMBNAIL_9);
2227   return num_images;
2228 }
2229
2230 std::vector<pp::ImageData> Instance::GetProgressBarResources(
2231     pp::ImageData* background) {
2232   std::vector<pp::ImageData> result(9);
2233   result[0] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_PROGRESS_BAR_0);
2234   result[1] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_PROGRESS_BAR_1);
2235   result[2] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_PROGRESS_BAR_2);
2236   result[3] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_PROGRESS_BAR_3);
2237   result[4] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_PROGRESS_BAR_4);
2238   result[5] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_PROGRESS_BAR_5);
2239   result[6] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_PROGRESS_BAR_6);
2240   result[7] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_PROGRESS_BAR_7);
2241   result[8] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_PROGRESS_BAR_8);
2242   *background = CreateResourceImage(
2243       PP_RESOURCEIMAGE_PDF_PROGRESS_BAR_BACKGROUND);
2244   return result;
2245 }
2246
2247 void Instance::CreatePageIndicator(bool always_visible) {
2248   page_indicator_.CreatePageIndicator(kPageIndicatorId, false, this,
2249       number_image_generator(), always_visible);
2250   ConfigurePageIndicator();
2251 }
2252
2253 void Instance::ConfigurePageIndicator() {
2254   pp::ImageData background =
2255       CreateResourceImage(PP_RESOURCEIMAGE_PDF_PAGE_INDICATOR_BACKGROUND);
2256   page_indicator_.Configure(pp::Point(), background);
2257 }
2258
2259 void Instance::CreateProgressBar() {
2260   pp::ImageData background;
2261   std::vector<pp::ImageData> images = GetProgressBarResources(&background);
2262   std::string text = GetLocalizedString(PP_RESOURCESTRING_PDFPROGRESSLOADING);
2263   progress_bar_.CreateProgressControl(kProgressBarId, false, this, 0.0,
2264       device_scale_, images, background, text);
2265 }
2266
2267 void Instance::ConfigureProgressBar() {
2268   pp::ImageData background;
2269   std::vector<pp::ImageData> images = GetProgressBarResources(&background);
2270   progress_bar_.Reconfigure(background, images, device_scale_);
2271 }
2272
2273 void Instance::CreateThumbnails() {
2274   thumbnails_.CreateThumbnailControl(
2275       kThumbnailsId, pp::Rect(), false, this, engine_.get(),
2276       number_image_generator());
2277 }
2278
2279 void Instance::LoadUrl(const std::string& url) {
2280   LoadUrlInternal(url, &embed_loader_, &Instance::DidOpen);
2281 }
2282
2283 void Instance::LoadPreviewUrl(const std::string& url) {
2284   LoadUrlInternal(url, &embed_preview_loader_, &Instance::DidOpenPreview);
2285 }
2286
2287 void Instance::LoadUrlInternal(const std::string& url, pp::URLLoader* loader,
2288                                void (Instance::* method)(int32_t)) {
2289   pp::URLRequestInfo request(this);
2290   request.SetURL(url);
2291   request.SetMethod("GET");
2292
2293   *loader = CreateURLLoaderInternal();
2294   pp::CompletionCallback callback = loader_factory_.NewCallback(method);
2295   int rv = loader->Open(request, callback);
2296   if (rv != PP_OK_COMPLETIONPENDING)
2297     callback.Run(rv);
2298 }
2299
2300 pp::URLLoader Instance::CreateURLLoaderInternal() {
2301   pp::URLLoader loader(this);
2302
2303   const PPB_URLLoaderTrusted* trusted_interface =
2304       reinterpret_cast<const PPB_URLLoaderTrusted*>(
2305           pp::Module::Get()->GetBrowserInterface(
2306               PPB_URLLOADERTRUSTED_INTERFACE));
2307   if (trusted_interface)
2308     trusted_interface->GrantUniversalAccess(loader.pp_resource());
2309   return loader;
2310 }
2311
2312 int Instance::GetInitialPage(const std::string& url) {
2313 #if defined(OS_NACL)
2314   return -1;
2315 #else
2316   size_t found_idx = url.find('#');
2317   if (found_idx == std::string::npos)
2318     return -1;
2319
2320   const std::string& ref = url.substr(found_idx + 1);
2321   std::vector<std::string> fragments;
2322   Tokenize(ref, kDelimiters, &fragments);
2323
2324   // Page number to return, zero-based.
2325   int page = -1;
2326
2327   // Handle the case of http://foo.com/bar#NAMEDDEST. This is not explicitly
2328   // mentioned except by example in the Adobe "PDF Open Parameters" document.
2329   if ((fragments.size() == 1) && (fragments[0].find('=') == std::string::npos))
2330     return engine_->GetNamedDestinationPage(fragments[0]);
2331
2332   for (size_t i = 0; i < fragments.size(); ++i) {
2333     std::vector<std::string> key_value;
2334     base::SplitString(fragments[i], '=', &key_value);
2335     if (key_value.size() != 2)
2336       continue;
2337     const std::string& key = key_value[0];
2338     const std::string& value = key_value[1];
2339
2340     if (base::strcasecmp(kPage, key.c_str()) == 0) {
2341       // |page_value| is 1-based.
2342       int page_value = -1;
2343       if (base::StringToInt(value, &page_value) && page_value > 0)
2344         page = page_value - 1;
2345       continue;
2346     }
2347     if (base::strcasecmp(kNamedDest, key.c_str()) == 0) {
2348       // |page_value| is 0-based.
2349       int page_value = engine_->GetNamedDestinationPage(value);
2350       if (page_value >= 0)
2351         page = page_value;
2352       continue;
2353     }
2354   }
2355   return page;
2356 #endif
2357 }
2358
2359 void Instance::UpdateToolbarPosition(bool invalidate) {
2360   pp::Rect ctrl_rc = toolbar_->GetControlsRect();
2361   int min_toolbar_width = ctrl_rc.width() + GetToolbarRightOffset() +
2362       GetScaled(kToolbarFadingOffsetLeft);
2363   int min_toolbar_height = ctrl_rc.width() + GetToolbarBottomOffset() +
2364       GetScaled(kToolbarFadingOffsetBottom);
2365
2366   // Update toolbar position
2367   if (plugin_size_.width() < min_toolbar_width ||
2368       plugin_size_.height() < min_toolbar_height) {
2369     // Disable toolbar if it does not fit on the screen.
2370     toolbar_->Show(false, invalidate);
2371   } else {
2372     pp::Point offset(
2373         plugin_size_.width() - GetToolbarRightOffset() - ctrl_rc.right(),
2374         plugin_size_.height() - GetToolbarBottomOffset() - ctrl_rc.bottom());
2375     toolbar_->MoveBy(offset, invalidate);
2376
2377     int toolbar_width = std::max(plugin_size_.width() / 2, min_toolbar_width);
2378     toolbar_->ExpandLeft(toolbar_width - toolbar_->rect().width());
2379     toolbar_->Show(painted_first_page_, invalidate);
2380   }
2381 }
2382
2383 void Instance::UpdateProgressBarPosition(bool invalidate) {
2384   // TODO(gene): verify we don't overlap with toolbar.
2385   int scrollbar_thickness = GetScrollbarThickness();
2386   pp::Point progress_origin(
2387       scrollbar_thickness + GetScaled(kProgressOffsetLeft),
2388       plugin_size_.height() - progress_bar_.rect().height() -
2389           scrollbar_thickness - GetScaled(kProgressOffsetBottom));
2390   progress_bar_.MoveTo(progress_origin, invalidate);
2391 }
2392
2393 void Instance::UpdatePageIndicatorPosition(bool invalidate) {
2394   int32 doc_height = static_cast<int>(document_size_.height() * zoom_);
2395   pp::Point origin(
2396       plugin_size_.width() - page_indicator_.rect().width() -
2397           GetScaled(GetScrollbarReservedThickness()),
2398       page_indicator_.GetYPosition(engine_->GetVerticalScrollbarYPosition(),
2399                                    doc_height, plugin_size_.height()));
2400   page_indicator_.MoveTo(origin, invalidate);
2401 }
2402
2403 void Instance::SetZoom(ZoomMode zoom_mode, double scale) {
2404   double old_zoom = zoom_;
2405
2406   zoom_mode_ = zoom_mode;
2407   if (zoom_mode_ == ZOOM_SCALE)
2408     zoom_ = scale;
2409   UpdateZoomScale();
2410
2411   engine_->ZoomUpdated(zoom_ * device_scale_);
2412   OnGeometryChanged(old_zoom, device_scale_);
2413
2414   // If fit-to-height, snap to the beginning of the most visible page.
2415   if (zoom_mode_ == ZOOM_FIT_TO_PAGE) {
2416     ScrollToPage(engine_->GetMostVisiblePage());
2417   }
2418
2419   // Update sticky buttons to the current zoom style.
2420   Button* ftp_btn = static_cast<Button*>(
2421       toolbar_->GetControl(kFitToPageButtonId));
2422   Button* ftw_btn = static_cast<Button*>(
2423       toolbar_->GetControl(kFitToWidthButtonId));
2424   switch (zoom_mode_) {
2425     case ZOOM_FIT_TO_PAGE:
2426       ftp_btn->SetPressedState(true);
2427       ftw_btn->SetPressedState(false);
2428       break;
2429     case ZOOM_FIT_TO_WIDTH:
2430       ftw_btn->SetPressedState(true);
2431       ftp_btn->SetPressedState(false);
2432       break;
2433     default:
2434       ftw_btn->SetPressedState(false);
2435       ftp_btn->SetPressedState(false);
2436   }
2437 }
2438
2439 void Instance::UpdateZoomScale() {
2440   switch (zoom_mode_) {
2441     case ZOOM_SCALE:
2442       break;  // Keep current scale.
2443     case ZOOM_FIT_TO_PAGE: {
2444       int page_num = engine_->GetFirstVisiblePage();
2445       if (page_num == -1)
2446         break;
2447       pp::Rect rc = engine_->GetPageRect(page_num);
2448       if (!rc.height())
2449         break;
2450       // Calculate fit to width zoom level.
2451       double ftw_zoom = static_cast<double>(plugin_dip_size_.width() -
2452           GetScrollbarReservedThickness()) / document_size_.width();
2453       // Calculate fit to height zoom level. If document will not fit
2454       // horizontally, adjust zoom level to allow space for horizontal
2455       // scrollbar.
2456       double fth_zoom =
2457           static_cast<double>(plugin_dip_size_.height()) / rc.height();
2458       if (fth_zoom * document_size_.width() >
2459           plugin_dip_size_.width() - GetScrollbarReservedThickness())
2460         fth_zoom = static_cast<double>(plugin_dip_size_.height()
2461             - GetScrollbarReservedThickness()) / rc.height();
2462       zoom_ = std::min(ftw_zoom, fth_zoom);
2463     } break;
2464     case ZOOM_FIT_TO_WIDTH:
2465     case ZOOM_AUTO:
2466       if (!document_size_.width())
2467         break;
2468       zoom_ = static_cast<double>(plugin_dip_size_.width() -
2469           GetScrollbarReservedThickness()) / document_size_.width();
2470       if (zoom_mode_ == ZOOM_AUTO && zoom_ > 1.0)
2471         zoom_ = 1.0;
2472       break;
2473   }
2474   zoom_ = ClipToRange(zoom_, kMinZoom, kMaxZoom);
2475 }
2476
2477 double Instance::CalculateZoom(uint32 control_id) const {
2478   if (control_id == kZoomInButtonId) {
2479     for (size_t i = 0; i < chrome_page_zoom::kPresetZoomFactorsSize; ++i) {
2480       double current_zoom = chrome_page_zoom::kPresetZoomFactors[i];
2481       if (current_zoom - content::kEpsilon > zoom_)
2482         return current_zoom;
2483     }
2484   } else {
2485     for (size_t i = chrome_page_zoom::kPresetZoomFactorsSize; i > 0; --i) {
2486       double current_zoom = chrome_page_zoom::kPresetZoomFactors[i - 1];
2487       if (current_zoom + content::kEpsilon < zoom_)
2488         return current_zoom;
2489     }
2490   }
2491   return zoom_;
2492 }
2493
2494 pp::ImageData Instance::CreateResourceImage(PP_ResourceImage image_id) {
2495   if (hidpi_enabled_)
2496     return pp::PDF::GetResourceImageForScale(this, image_id, device_scale_);
2497
2498   return pp::PDF::GetResourceImage(this, image_id);
2499 }
2500
2501 std::string Instance::GetLocalizedString(PP_ResourceString id) {
2502   pp::Var rv(pp::PDF::GetLocalizedString(this, id));
2503   if (!rv.is_string())
2504     return std::string();
2505
2506   return rv.AsString();
2507 }
2508
2509 void Instance::DrawText(const pp::Point& top_center, PP_ResourceString id) {
2510   std::string str(GetLocalizedString(id));
2511
2512   pp::FontDescription_Dev description;
2513   description.set_family(PP_FONTFAMILY_SANSSERIF);
2514   description.set_size(kMessageTextSize * device_scale_);
2515   pp::Font_Dev font(this, description);
2516   int length = font.MeasureSimpleText(str);
2517   pp::Point point(top_center);
2518   point.set_x(point.x() - length / 2);
2519   DCHECK(!image_data_.is_null());
2520   font.DrawSimpleText(&image_data_, str, point, kMessageTextColor);
2521 }
2522
2523 void Instance::SetPrintPreviewMode(int page_count) {
2524   if (!IsPrintPreview() || page_count <= 0) {
2525     print_preview_page_count_ = 0;
2526     return;
2527   }
2528
2529   print_preview_page_count_ = page_count;
2530   ScrollToPage(0);
2531   engine_->AppendBlankPages(print_preview_page_count_);
2532   if (preview_pages_info_.size() > 0)
2533     LoadAvailablePreviewPage();
2534 }
2535
2536 bool Instance::IsPrintPreview() {
2537   return IsPrintPreviewUrl(url_);
2538 }
2539
2540 int Instance::GetPageNumberToDisplay() {
2541   int page = engine_->GetMostVisiblePage();
2542   if (IsPrintPreview() && !print_preview_page_numbers_.empty()) {
2543     page = ClipToRange<int>(page, 0, print_preview_page_numbers_.size() - 1);
2544     return print_preview_page_numbers_[page];
2545   }
2546   return page + 1;
2547 }
2548
2549 void Instance::ProcessPreviewPageInfo(const std::string& url,
2550                                       int dst_page_index) {
2551   if (!IsPrintPreview() || print_preview_page_count_ < 0)
2552     return;
2553
2554   int src_page_index = ExtractPrintPreviewPageIndex(url);
2555   if (src_page_index < 1)
2556     return;
2557
2558   preview_pages_info_.push(std::make_pair(url, dst_page_index));
2559   LoadAvailablePreviewPage();
2560 }
2561
2562 void Instance::LoadAvailablePreviewPage() {
2563   if (preview_pages_info_.size() <= 0)
2564     return;
2565
2566   std::string url = preview_pages_info_.front().first;
2567   int dst_page_index = preview_pages_info_.front().second;
2568   int src_page_index = ExtractPrintPreviewPageIndex(url);
2569   if (src_page_index < 1 ||
2570       dst_page_index >= print_preview_page_count_ ||
2571       preview_document_load_state_ == LOAD_STATE_LOADING) {
2572     return;
2573   }
2574
2575   preview_document_load_state_ = LOAD_STATE_LOADING;
2576   LoadPreviewUrl(url);
2577 }
2578
2579 void Instance::EnableAutoscroll(const pp::Point& origin) {
2580   if (is_autoscroll_)
2581     return;
2582
2583   pp::Size client_size = plugin_size_;
2584   if (v_scrollbar_.get())
2585     client_size.Enlarge(-GetScrollbarThickness(), 0);
2586   if (h_scrollbar_.get())
2587     client_size.Enlarge(0, -GetScrollbarThickness());
2588
2589   // Do not allow autoscroll if client area is too small.
2590   if (autoscroll_anchor_.size().width() > client_size.width() ||
2591       autoscroll_anchor_.size().height() > client_size.height())
2592     return;
2593
2594   autoscroll_rect_ = pp::Rect(
2595       pp::Point(origin.x() - autoscroll_anchor_.size().width() / 2,
2596                 origin.y() - autoscroll_anchor_.size().height() / 2),
2597       autoscroll_anchor_.size());
2598
2599   // Make sure autoscroll anchor is in the client area.
2600   if (autoscroll_rect_.right() > client_size.width()) {
2601     autoscroll_rect_.set_x(
2602         client_size.width() - autoscroll_anchor_.size().width());
2603   }
2604   if (autoscroll_rect_.bottom() > client_size.height()) {
2605     autoscroll_rect_.set_y(
2606         client_size.height() - autoscroll_anchor_.size().height());
2607   }
2608
2609   if (autoscroll_rect_.x() < 0)
2610     autoscroll_rect_.set_x(0);
2611   if (autoscroll_rect_.y() < 0)
2612     autoscroll_rect_.set_y(0);
2613
2614   is_autoscroll_ = true;
2615   Invalidate(kAutoScrollId, autoscroll_rect_);
2616
2617   ScheduleTimer(kAutoScrollId, kAutoScrollTimeoutMs);
2618 }
2619
2620 void Instance::DisableAutoscroll() {
2621   if (is_autoscroll_) {
2622     is_autoscroll_ = false;
2623     Invalidate(kAutoScrollId, autoscroll_rect_);
2624   }
2625 }
2626
2627 PP_CursorType_Dev Instance::CalculateAutoscroll(const pp::Point& mouse_pos) {
2628   // Scroll only if mouse pointer is outside of the anchor area.
2629   if (autoscroll_rect_.Contains(mouse_pos)) {
2630     autoscroll_x_ = 0;
2631     autoscroll_y_ = 0;
2632     return PP_CURSORTYPE_MIDDLEPANNING;
2633   }
2634
2635   // Relative position to the center of anchor area.
2636   pp::Point rel_pos = mouse_pos - autoscroll_rect_.CenterPoint();
2637
2638   // Calculate angle from the X axis. Angle is in range from -pi to pi.
2639   double angle = atan2(static_cast<double>(rel_pos.y()),
2640                        static_cast<double>(rel_pos.x()));
2641
2642   autoscroll_x_ = rel_pos.x() * kAutoScrollFactor;
2643   autoscroll_y_ = rel_pos.y() * kAutoScrollFactor;
2644
2645   // Angle is from -pi to pi. Screen Y is increasing toward bottom,
2646   // so negative angle represent north direction.
2647   if (angle < - (M_PI * 7.0 / 8.0)) {
2648     // going west
2649     return PP_CURSORTYPE_WESTPANNING;
2650   } else if (angle < - (M_PI * 5.0 / 8.0)) {
2651     // going north-west
2652     return PP_CURSORTYPE_NORTHWESTPANNING;
2653   } else if (angle < - (M_PI * 3.0 / 8.0)) {
2654     // going north.
2655     return PP_CURSORTYPE_NORTHPANNING;
2656   } else if (angle < - (M_PI * 1.0 / 8.0)) {
2657     // going north-east
2658     return PP_CURSORTYPE_NORTHEASTPANNING;
2659   } else if (angle < M_PI * 1.0 / 8.0) {
2660     // going east.
2661     return PP_CURSORTYPE_EASTPANNING;
2662   } else if (angle < M_PI * 3.0 / 8.0) {
2663     // going south-east
2664     return PP_CURSORTYPE_SOUTHEASTPANNING;
2665   } else if (angle < M_PI * 5.0 / 8.0) {
2666     // going south.
2667     return PP_CURSORTYPE_SOUTHPANNING;
2668   } else if (angle < M_PI * 7.0 / 8.0) {
2669     // going south-west
2670     return PP_CURSORTYPE_SOUTHWESTPANNING;
2671   }
2672
2673   // went around the circle, going west again
2674   return PP_CURSORTYPE_WESTPANNING;
2675 }
2676
2677 void Instance::ConfigureNumberImageGenerator() {
2678   std::vector<pp::ImageData> num_images = GetThumbnailResources();
2679   pp::ImageData number_background = CreateResourceImage(
2680       PP_RESOURCEIMAGE_PDF_BUTTON_THUMBNAIL_NUM_BACKGROUND);
2681   number_image_generator_->Configure(number_background,
2682                                      num_images,
2683                                      device_scale_);
2684 }
2685
2686 NumberImageGenerator* Instance::number_image_generator() {
2687   if (!number_image_generator_.get()) {
2688     number_image_generator_.reset(new NumberImageGenerator(this));
2689     ConfigureNumberImageGenerator();
2690   }
2691   return number_image_generator_.get();
2692 }
2693
2694 int Instance::GetScaled(int x) const {
2695   return static_cast<int>(x * device_scale_);
2696 }
2697
2698 void Instance::UserMetricsRecordAction(const std::string& action) {
2699   pp::PDF::UserMetricsRecordAction(this, pp::Var(action));
2700 }
2701
2702 PDFScriptableObject::PDFScriptableObject(Instance* instance)
2703     : instance_(instance) {
2704 }
2705
2706 PDFScriptableObject::~PDFScriptableObject() {
2707 }
2708
2709 bool PDFScriptableObject::HasMethod(const pp::Var& name, pp::Var* exception) {
2710   return instance_->HasScriptableMethod(name, exception);
2711 }
2712
2713 pp::Var PDFScriptableObject::Call(const pp::Var& method,
2714                                   const std::vector<pp::Var>& args,
2715                                   pp::Var* exception) {
2716   return instance_->CallScriptableMethod(method, args, exception);
2717 }
2718
2719 }  // namespace chrome_pdf