chrome/browser/ui/views/tab_icon_view.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 "chrome/browser/ui/views/tab_icon_view.h"
   6
   7 #if defined(OS_WIN)
   8 #include <windows.h>
   9 #include <shellapi.h>
  10 #endif
  11
  12 #include "base/logging.h"
  13 #include "base/memory/scoped_ptr.h"
  14 #include "chrome/app/chrome_command_ids.h"
  15 #include "chrome/browser/ui/views/tab_icon_view_model.h"
  16 #include "grit/theme_resources.h"
  17 #include "grit/ui_resources.h"
  18 #include "ui/base/resource/resource_bundle.h"
  19 #include "ui/base/theme_provider.h"
  20 #include "ui/gfx/canvas.h"
  21 #include "ui/gfx/favicon_size.h"
  22
  23 #if defined(OS_WIN)
  24 #include "chrome/browser/app_icon_win.h"
  25 #include "ui/gfx/icon_util.h"
  26 #endif
  27
  28 static bool g_initialized = false;
  29 static gfx::ImageSkia* g_default_favicon = NULL;
  30
  31 // static
  32 void TabIconView::InitializeIfNeeded() {
  33   if (!g_initialized) {
  34     g_initialized = true;
  35
  36 #if defined(OS_WIN)
  37     // The default window icon is the application icon, not the default
  38     // favicon.
  39     HICON app_icon = GetAppIcon();
  40     scoped_ptr<SkBitmap> bitmap(
  41         IconUtil::CreateSkBitmapFromHICON(app_icon, gfx::Size(16, 16)));
  42     g_default_favicon = new gfx::ImageSkia(gfx::ImageSkiaRep(*bitmap, 1.0f));
  43     DestroyIcon(app_icon);
  44 #else
  45     ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
  46     g_default_favicon = rb.GetImageSkiaNamed(IDR_PRODUCT_LOGO_16);
  47 #endif
  48   }
  49 }
  50
  51 TabIconView::TabIconView(chrome::TabIconViewModel* model,
  52                          views::MenuButtonListener* listener)
  53     : views::MenuButton(NULL, base::string16(), listener, false),
  54       model_(model),
  55       throbber_running_(false),
  56       is_light_(false),
  57       throbber_frame_(0) {
  58   InitializeIfNeeded();
  59 }
  60
  61 TabIconView::~TabIconView() {
  62 }
  63
  64 void TabIconView::Update() {
  65   static bool initialized = false;
  66   static int throbber_frame_count = 0;
  67   if (!initialized) {
  68     initialized = true;
  69     gfx::ImageSkia throbber(*ui::ResourceBundle::GetSharedInstance().
  70         GetImageSkiaNamed(IDR_THROBBER));
  71     throbber_frame_count = throbber.width() / throbber.height();
  72   }
  73
  74   if (throbber_running_) {
  75     // We think the tab is loading.
  76     if (!model_->ShouldTabIconViewAnimate()) {
  77       // Woops, tab is invalid or not loading, reset our status and schedule
  78       // a paint.
  79       throbber_running_ = false;
  80       SchedulePaint();
  81     } else {
  82       // The tab is still loading, increment the frame.
  83       throbber_frame_ = (throbber_frame_ + 1) % throbber_frame_count;
  84       SchedulePaint();
  85     }
  86   } else if (model_->ShouldTabIconViewAnimate()) {
  87     // We didn't think we were loading, but the tab is loading. Reset the
  88     // frame and status and schedule a paint.
  89     throbber_running_ = true;
  90     throbber_frame_ = 0;
  91     SchedulePaint();
  92   }
  93 }
  94
  95 void TabIconView::PaintThrobber(gfx::Canvas* canvas) {
  96   gfx::ImageSkia throbber(*GetThemeProvider()->GetImageSkiaNamed(
  97       is_light_ ? IDR_THROBBER_LIGHT : IDR_THROBBER));
  98   int image_size = throbber.height();
  99   PaintIcon(canvas, throbber, throbber_frame_ * image_size, 0, image_size,
 100             image_size, false);
 101 }
 102
 103 void TabIconView::PaintFavicon(gfx::Canvas* canvas,
 104                                const gfx::ImageSkia& image) {
 105   PaintIcon(canvas, image, 0, 0, image.width(), image.height(), true);
 106 }
 107
 108 void TabIconView::PaintIcon(gfx::Canvas* canvas,
 109                             const gfx::ImageSkia& image,
 110                             int src_x,
 111                             int src_y,
 112                             int src_w,
 113                             int src_h,
 114                             bool filter) {
 115   // For source images smaller than the favicon square, scale them as if they
 116   // were padded to fit the favicon square, so we don't blow up tiny favicons
 117   // into larger or nonproportional results.
 118   float float_src_w = static_cast<float>(src_w);
 119   float float_src_h = static_cast<float>(src_h);
 120   float scalable_w, scalable_h;
 121   if (src_w <= gfx::kFaviconSize && src_h <= gfx::kFaviconSize) {
 122     scalable_w = scalable_h = gfx::kFaviconSize;
 123   } else {
 124     scalable_w = float_src_w;
 125     scalable_h = float_src_h;
 126   }
 127
 128   // Scale proportionately.
 129   float scale = std::min(static_cast<float>(width()) / scalable_w,
 130                          static_cast<float>(height()) / scalable_h);
 131   int dest_w = static_cast<int>(float_src_w * scale);
 132   int dest_h = static_cast<int>(float_src_h * scale);
 133
 134   // Center the scaled image.
 135   canvas->DrawImageInt(image, src_x, src_y, src_w, src_h,
 136                        (width() - dest_w) / 2, (height() - dest_h) / 2, dest_w,
 137                        dest_h, filter);
 138 }
 139
 140 void TabIconView::OnPaint(gfx::Canvas* canvas) {
 141   bool rendered = false;
 142
 143   if (throbber_running_) {
 144     rendered = true;
 145     PaintThrobber(canvas);
 146   } else {
 147     gfx::ImageSkia favicon = model_->GetFaviconForTabIconView();
 148     if (!favicon.isNull()) {
 149       rendered = true;
 150       PaintFavicon(canvas, favicon);
 151     }
 152   }
 153
 154   if (!rendered)
 155     PaintFavicon(canvas, *g_default_favicon);
 156 }
 157
 158 gfx::Size TabIconView::GetPreferredSize() {
 159   return gfx::Size(gfx::kFaviconSize, gfx::kFaviconSize);
 160 }