android_webview/renderer/aw_render_view_ext.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 "android_webview/renderer/aw_render_view_ext.h"
   6
   7 #include <string>
   8
   9 #include "android_webview/common/aw_hit_test_data.h"
  10 #include "android_webview/common/render_view_messages.h"
  11 #include "base/bind.h"
  12 #include "base/strings/string_piece.h"
  13 #include "base/strings/utf_string_conversions.h"
  14 #include "base/time/time.h"
  15 #include "content/public/common/url_constants.h"
  16 #include "content/public/renderer/android_content_detection_prefixes.h"
  17 #include "content/public/renderer/document_state.h"
  18 #include "content/public/renderer/render_view.h"
  19 #include "skia/ext/refptr.h"
  20 #include "third_party/WebKit/public/platform/WebSize.h"
  21 #include "third_party/WebKit/public/platform/WebURL.h"
  22 #include "third_party/WebKit/public/platform/WebVector.h"
  23 #include "third_party/WebKit/public/web/WebDataSource.h"
  24 #include "third_party/WebKit/public/web/WebDocument.h"
  25 #include "third_party/WebKit/public/web/WebElement.h"
  26 #include "third_party/WebKit/public/web/WebElementCollection.h"
  27 #include "third_party/WebKit/public/web/WebHitTestResult.h"
  28 #include "third_party/WebKit/public/web/WebImageCache.h"
  29 #include "third_party/WebKit/public/web/WebLocalFrame.h"
  30 #include "third_party/WebKit/public/web/WebNode.h"
  31 #include "third_party/WebKit/public/web/WebSecurityOrigin.h"
  32 #include "third_party/WebKit/public/web/WebView.h"
  33 #include "url/url_canon.h"
  34 #include "url/url_util.h"
  35
  36 namespace android_webview {
  37
  38 namespace {
  39
  40 GURL GetAbsoluteUrl(const blink::WebNode& node,
  41                     const base::string16& url_fragment) {
  42   return GURL(node.document().completeURL(url_fragment));
  43 }
  44
  45 base::string16 GetHref(const blink::WebElement& element) {
  46   // Get the actual 'href' attribute, which might relative if valid or can
  47   // possibly contain garbage otherwise, so not using absoluteLinkURL here.
  48   return element.getAttribute("href");
  49 }
  50
  51 GURL GetAbsoluteSrcUrl(const blink::WebElement& element) {
  52   if (element.isNull())
  53     return GURL();
  54   return GetAbsoluteUrl(element, element.getAttribute("src"));
  55 }
  56
  57 blink::WebElement GetImgChild(const blink::WebElement& element) {
  58   // This implementation is incomplete (for example if is an area tag) but
  59   // matches the original WebViewClassic implementation.
  60
  61   blink::WebElementCollection collection = element.getElementsByTagName("img");
  62   DCHECK(!collection.isNull());
  63   return collection.firstItem();
  64 }
  65
  66 bool RemovePrefixAndAssignIfMatches(const base::StringPiece& prefix,
  67                                     const GURL& url,
  68                                     std::string* dest) {
  69   const base::StringPiece spec(url.possibly_invalid_spec());
  70
  71   if (spec.starts_with(prefix)) {
  72     url::RawCanonOutputW<1024> output;
  73     url::DecodeURLEscapeSequences(spec.data() + prefix.length(),
  74                                   spec.length() - prefix.length(),
  75                                   &output);
  76     std::string decoded_url = base::UTF16ToUTF8(
  77         base::string16(output.data(), output.length()));
  78     dest->assign(decoded_url.begin(), decoded_url.end());
  79     return true;
  80   }
  81   return false;
  82 }
  83
  84 void DistinguishAndAssignSrcLinkType(const GURL& url, AwHitTestData* data) {
  85   if (RemovePrefixAndAssignIfMatches(
  86       content::kAddressPrefix,
  87       url,
  88       &data->extra_data_for_type)) {
  89     data->type = AwHitTestData::GEO_TYPE;
  90   } else if (RemovePrefixAndAssignIfMatches(
  91       content::kPhoneNumberPrefix,
  92       url,
  93       &data->extra_data_for_type)) {
  94     data->type = AwHitTestData::PHONE_TYPE;
  95   } else if (RemovePrefixAndAssignIfMatches(
  96       content::kEmailPrefix,
  97       url,
  98       &data->extra_data_for_type)) {
  99     data->type = AwHitTestData::EMAIL_TYPE;
 100   } else {
 101     data->type = AwHitTestData::SRC_LINK_TYPE;
 102     data->extra_data_for_type = url.possibly_invalid_spec();
 103     if (!data->extra_data_for_type.empty())
 104       data->href = base::UTF8ToUTF16(data->extra_data_for_type);
 105   }
 106 }
 107
 108 void PopulateHitTestData(const GURL& absolute_link_url,
 109                          const GURL& absolute_image_url,
 110                          bool is_editable,
 111                          AwHitTestData* data) {
 112   // Note: Using GURL::is_empty instead of GURL:is_valid due to the
 113   // WebViewClassic allowing any kind of protocol which GURL::is_valid
 114   // disallows. Similar reasons for using GURL::possibly_invalid_spec instead of
 115   // GURL::spec.
 116   if (!absolute_image_url.is_empty())
 117     data->img_src = absolute_image_url;
 118
 119   const bool is_javascript_scheme =
 120       absolute_link_url.SchemeIs(content::kJavaScriptScheme);
 121   const bool has_link_url = !absolute_link_url.is_empty();
 122   const bool has_image_url = !absolute_image_url.is_empty();
 123
 124   if (has_link_url && !has_image_url && !is_javascript_scheme) {
 125     DistinguishAndAssignSrcLinkType(absolute_link_url, data);
 126   } else if (has_link_url && has_image_url && !is_javascript_scheme) {
 127     data->type = AwHitTestData::SRC_IMAGE_LINK_TYPE;
 128     data->extra_data_for_type = data->img_src.possibly_invalid_spec();
 129     if (absolute_link_url.is_valid())
 130       data->href = base::UTF8ToUTF16(absolute_link_url.possibly_invalid_spec());
 131   } else if (!has_link_url && has_image_url) {
 132     data->type = AwHitTestData::IMAGE_TYPE;
 133     data->extra_data_for_type = data->img_src.possibly_invalid_spec();
 134   } else if (is_editable) {
 135     data->type = AwHitTestData::EDIT_TEXT_TYPE;
 136     DCHECK(data->extra_data_for_type.length() == 0);
 137   }
 138 }
 139
 140 }  // namespace
 141
 142 AwRenderViewExt::AwRenderViewExt(content::RenderView* render_view)
 143     : content::RenderViewObserver(render_view), page_scale_factor_(0.0f) {
 144 }
 145
 146 AwRenderViewExt::~AwRenderViewExt() {
 147 }
 148
 149 // static
 150 void AwRenderViewExt::RenderViewCreated(content::RenderView* render_view) {
 151   new AwRenderViewExt(render_view);  // |render_view| takes ownership.
 152 }
 153
 154 bool AwRenderViewExt::OnMessageReceived(const IPC::Message& message) {
 155   bool handled = true;
 156   IPC_BEGIN_MESSAGE_MAP(AwRenderViewExt, message)
 157     IPC_MESSAGE_HANDLER(AwViewMsg_DocumentHasImages, OnDocumentHasImagesRequest)
 158     IPC_MESSAGE_HANDLER(AwViewMsg_DoHitTest, OnDoHitTest)
 159     IPC_MESSAGE_HANDLER(AwViewMsg_SetTextZoomFactor, OnSetTextZoomFactor)
 160     IPC_MESSAGE_HANDLER(AwViewMsg_ResetScrollAndScaleState,
 161                         OnResetScrollAndScaleState)
 162     IPC_MESSAGE_HANDLER(AwViewMsg_SetInitialPageScale, OnSetInitialPageScale)
 163     IPC_MESSAGE_HANDLER(AwViewMsg_SetFixedLayoutSize, OnSetFixedLayoutSize)
 164     IPC_MESSAGE_HANDLER(AwViewMsg_SetBackgroundColor, OnSetBackgroundColor)
 165     IPC_MESSAGE_UNHANDLED(handled = false)
 166   IPC_END_MESSAGE_MAP()
 167   return handled;
 168 }
 169
 170 void AwRenderViewExt::OnDocumentHasImagesRequest(int id) {
 171   bool hasImages = false;
 172   if (render_view()) {
 173     blink::WebView* webview = render_view()->GetWebView();
 174     if (webview) {
 175       blink::WebVector<blink::WebElement> images;
 176       webview->mainFrame()->document().images(images);
 177       hasImages = !images.isEmpty();
 178     }
 179   }
 180   Send(new AwViewHostMsg_DocumentHasImagesResponse(routing_id(), id,
 181                                                    hasImages));
 182 }
 183
 184 void AwRenderViewExt::DidCommitProvisionalLoad(blink::WebLocalFrame* frame,
 185                                                bool is_new_navigation) {
 186   content::DocumentState* document_state =
 187       content::DocumentState::FromDataSource(frame->dataSource());
 188   if (document_state->can_load_local_resources()) {
 189     blink::WebSecurityOrigin origin = frame->document().securityOrigin();
 190     origin.grantLoadLocalResources();
 191   }
 192 }
 193
 194 void AwRenderViewExt::DidCommitCompositorFrame() {
 195   UpdatePageScaleFactor();
 196 }
 197
 198 void AwRenderViewExt::DidUpdateLayout() {
 199   if (check_contents_size_timer_.IsRunning())
 200     return;
 201
 202   check_contents_size_timer_.Start(FROM_HERE,
 203                                    base::TimeDelta::FromMilliseconds(0), this,
 204                                    &AwRenderViewExt::CheckContentsSize);
 205 }
 206
 207 void AwRenderViewExt::UpdatePageScaleFactor() {
 208   if (page_scale_factor_ != render_view()->GetWebView()->pageScaleFactor()) {
 209     page_scale_factor_ = render_view()->GetWebView()->pageScaleFactor();
 210     Send(new AwViewHostMsg_PageScaleFactorChanged(routing_id(),
 211                                                   page_scale_factor_));
 212   }
 213 }
 214
 215 void AwRenderViewExt::CheckContentsSize() {
 216   if (!render_view()->GetWebView())
 217     return;
 218
 219   gfx::Size contents_size;
 220
 221   blink::WebFrame* main_frame = render_view()->GetWebView()->mainFrame();
 222   if (main_frame)
 223     contents_size = main_frame->contentsSize();
 224
 225   // Fall back to contentsPreferredMinimumSize if the mainFrame is reporting a
 226   // 0x0 size (this happens during initial load).
 227   if (contents_size.IsEmpty()) {
 228     contents_size = render_view()->GetWebView()->contentsPreferredMinimumSize();
 229   }
 230
 231   if (contents_size == last_sent_contents_size_)
 232     return;
 233
 234   last_sent_contents_size_ = contents_size;
 235   Send(new AwViewHostMsg_OnContentsSizeChanged(routing_id(), contents_size));
 236 }
 237
 238 void AwRenderViewExt::Navigate(const GURL& url) {
 239   // Navigate is called only on NEW navigations, so WebImageCache won't be freed
 240   // when the user just clicks on links, but only when a navigation is started,
 241   // for instance via loadUrl. A better approach would be clearing the cache on
 242   // cross-site boundaries, however this would require too many changes both on
 243   // the browser side (in RenderViewHostManger), to the IPCmessages and to the
 244   // RenderViewObserver. Thus, clearing decoding image cache on Navigate, seems
 245   // a more acceptable compromise.
 246   blink::WebImageCache::clear();
 247 }
 248
 249 void AwRenderViewExt::FocusedNodeChanged(const blink::WebNode& node) {
 250   if (node.isNull() || !node.isElementNode() || !render_view())
 251     return;
 252
 253   // Note: element is not const due to innerText() is not const.
 254   blink::WebElement element = node.toConst<blink::WebElement>();
 255   AwHitTestData data;
 256
 257   data.href = GetHref(element);
 258   data.anchor_text = element.innerText();
 259
 260   GURL absolute_link_url;
 261   if (node.isLink())
 262     absolute_link_url = GetAbsoluteUrl(node, data.href);
 263
 264   GURL absolute_image_url;
 265   const blink::WebElement child_img = GetImgChild(element);
 266   if (!child_img.isNull()) {
 267     absolute_image_url =
 268         GetAbsoluteSrcUrl(child_img);
 269   }
 270
 271   PopulateHitTestData(absolute_link_url,
 272                       absolute_image_url,
 273                       render_view()->IsEditableNode(node),
 274                       &data);
 275   Send(new AwViewHostMsg_UpdateHitTestData(routing_id(), data));
 276 }
 277
 278 void AwRenderViewExt::OnDoHitTest(int view_x, int view_y) {
 279   if (!render_view() || !render_view()->GetWebView())
 280     return;
 281
 282   const blink::WebHitTestResult result =
 283       render_view()->GetWebView()->hitTestResultAt(
 284           blink::WebPoint(view_x, view_y));
 285   AwHitTestData data;
 286
 287   if (!result.urlElement().isNull()) {
 288     data.anchor_text = result.urlElement().innerText();
 289     data.href = GetHref(result.urlElement());
 290   }
 291
 292   PopulateHitTestData(result.absoluteLinkURL(),
 293                       result.absoluteImageURL(),
 294                       result.isContentEditable(),
 295                       &data);
 296   Send(new AwViewHostMsg_UpdateHitTestData(routing_id(), data));
 297 }
 298
 299 void AwRenderViewExt::OnSetTextZoomFactor(float zoom_factor) {
 300   if (!render_view() || !render_view()->GetWebView())
 301     return;
 302   // Hide selection and autofill popups.
 303   render_view()->GetWebView()->hidePopups();
 304   render_view()->GetWebView()->setTextZoomFactor(zoom_factor);
 305 }
 306
 307 void AwRenderViewExt::OnResetScrollAndScaleState() {
 308   if (!render_view() || !render_view()->GetWebView())
 309     return;
 310   render_view()->GetWebView()->resetScrollAndScaleState();
 311 }
 312
 313 void AwRenderViewExt::OnSetInitialPageScale(double page_scale_factor) {
 314   if (!render_view() || !render_view()->GetWebView())
 315     return;
 316   render_view()->GetWebView()->setInitialPageScaleOverride(
 317       page_scale_factor);
 318 }
 319
 320 void AwRenderViewExt::OnSetFixedLayoutSize(const gfx::Size& size) {
 321   if (!render_view() || !render_view()->GetWebView())
 322     return;
 323   render_view()->GetWebView()->setFixedLayoutSize(size);
 324 }
 325
 326 void AwRenderViewExt::OnSetBackgroundColor(SkColor c) {
 327   if (!render_view() || !render_view()->GetWebView())
 328     return;
 329   render_view()->GetWebView()->setBaseBackgroundColor(c);
 330 }
 331
 332 }  // namespace android_webview