Use animated vector icon for app menu notification animation.

ui/gfx/paint_vector_icon.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/gfx/paint_vector_icon.h"
 
 #include <map>
 #include <tuple>
 
 #include "base/i18n/rtl.h"
 #include "base/lazy_instance.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_split.h"
 #include "base/trace_event/trace_event.h"
 #include "cc/paint/paint_canvas.h"
 #include "cc/paint/paint_flags.h"
 #include "third_party/skia/include/core/SkPath.h"
 #include "ui/gfx/animation/tween.h"
 #include "ui/gfx/canvas.h"
+#include "ui/gfx/color_palette.h"
 #include "ui/gfx/image/canvas_image_source.h"
 #include "ui/gfx/scoped_canvas.h"
 #include "ui/gfx/vector_icon_types.h"
 
 namespace gfx {
 
 namespace {
 
 // Helper that simplifies iterating over a sequence of PathElements.
 class PathParser {
@@ skipping 398 matching lines @@
   if (!clip_rect.isEmpty())
     canvas->sk_canvas()->clipRect(clip_rect);
 
   DCHECK_EQ(flags_array.size(), paths.size());
   for (size_t i = 0; i < paths.size(); ++i)
     canvas->DrawPath(paths[i], flags_array[i]);
 }
 
 class VectorIconSource : public CanvasImageSource {
  public:
-  VectorIconSource(const VectorIcon& icon,
-                   int dip_size,
-                   SkColor color,
-                   const VectorIcon& badge_icon)
-      : CanvasImageSource(Size(dip_size, dip_size), false),
-        color_(color),
-        icon_(icon),
-        badge_(badge_icon) {}
+  explicit VectorIconSource(const IconDescription& data)
+      : CanvasImageSource(Size(data.dip_size, data.dip_size), false),
+        data_(data) {}
 
   VectorIconSource(const std::string& definition, int dip_size, SkColor color)
       : CanvasImageSource(Size(dip_size, dip_size), false),
-        color_(color),
-        icon_(kNoneIcon),
-        badge_(kNoneIcon),
+        data_(kNoneIcon, dip_size, color, base::TimeDelta(), kNoneIcon),
         path_(PathFromSource(definition)) {}
 
   ~VectorIconSource() override {}
 
   // CanvasImageSource:
   bool HasRepresentationAtAllScales() const override {
-    return !icon_.is_empty();
+    return !data_.icon.is_empty();
   }
 
   void Draw(Canvas* canvas) override {
     if (path_.empty()) {
-      PaintVectorIcon(canvas, icon_, size_.width(), color_);
-      if (!badge_.is_empty())
-        PaintVectorIcon(canvas, badge_, size_.width(), color_);
+      PaintVectorIcon(canvas, data_.icon, size_.width(), data_.color,
+                      data_.elapsed_time);
+      if (!data_.badge_icon.is_empty())
+        PaintVectorIcon(canvas, data_.badge_icon, size_.width(), data_.color);
     } else {
-      PaintPath(canvas, path_.data(), size_.width(), color_, base::TimeDelta());
+      PaintPath(canvas, path_.data(), size_.width(), data_.color,
+                base::TimeDelta());
     }
   }
 
  private:
-  const SkColor color_;
-  const VectorIcon& icon_;
-  const VectorIcon& badge_;
+  const IconDescription data_;
   const std::vector<PathElement> path_;
 
   DISALLOW_COPY_AND_ASSIGN(VectorIconSource);
 };
 
 // This class caches vector icons (as ImageSkia) so they don't have to be drawn
 // more than once. This also guarantees the backing data for the images returned
 // by CreateVectorIcon will persist in memory until program termination.
 class VectorIconCache {
  public:
   VectorIconCache() {}
   ~VectorIconCache() {}
 
-  ImageSkia GetOrCreateIcon(const VectorIcon& icon,
-                            int dip_size,
-                            SkColor color,
-                            const VectorIcon& badge_icon) {
-    IconDescription description(&icon, dip_size, color, &badge_icon);
+  ImageSkia GetOrCreateIcon(const IconDescription& description) {
     auto iter = images_.find(description);
     if (iter != images_.end())
       return iter->second;
 
-    ImageSkia icon_image(
-        new VectorIconSource(icon, dip_size, color, badge_icon),
-        Size(dip_size, dip_size));
+    ImageSkia icon_image(new VectorIconSource(description),
+                         Size(description.dip_size, description.dip_size));
     images_.insert(std::make_pair(description, icon_image));
     return icon_image;
   }
 
  private:
-  struct IconDescription {
-    IconDescription(const VectorIcon* icon,
-                    int dip_size,
-                    SkColor color,
-                    const VectorIcon* badge_icon)
-        : icon(icon),
-          dip_size(dip_size),
-          color(color),
-          badge_icon(badge_icon) {}
-
-    bool operator<(const IconDescription& other) const {
-      return std::tie(icon, dip_size, color, badge_icon) <
-             std::tie(other.icon, other.dip_size, other.color,
-                      other.badge_icon);
-    }
-
-    const VectorIcon* icon;
-    int dip_size;
-    SkColor color;
-    const VectorIcon* badge_icon;
-  };
-
   std::map<IconDescription, ImageSkia> images_;
 
   DISALLOW_COPY_AND_ASSIGN(VectorIconCache);
 };
 
 static base::LazyInstance<VectorIconCache>::DestructorAtExit g_icon_cache =
     LAZY_INSTANCE_INITIALIZER;
 
 }  // namespace
 
+IconDescription::IconDescription(const IconDescription& other) = default;
+
+IconDescription::IconDescription(const VectorIcon& icon,
+                                 int dip_size,
+                                 SkColor color,
+                                 const base::TimeDelta& elapsed_time,
+                                 const VectorIcon& badge_icon)
+    : icon(icon),
+      dip_size(dip_size),
+      color(color),
+      elapsed_time(elapsed_time),
+      badge_icon(badge_icon) {
+  if (dip_size == 0)
+    this->dip_size = GetDefaultSizeOfVectorIcon(icon);
+}
+
+IconDescription::~IconDescription() {}
+
+bool IconDescription::operator<(const IconDescription& other) const {
+  const VectorIcon* this_icon = &icon;
+  const VectorIcon* other_icon = &other.icon;
+  const VectorIcon* this_badge = &badge_icon;
+  const VectorIcon* other_badge = &other.badge_icon;
+  return std::tie(this_icon, dip_size, color, elapsed_time, this_badge) <
+         std::tie(other_icon, other.dip_size, other.color, other.elapsed_time,

[sadrul, 2017/05/24 17:35:13]

This is .. comparing pointers?

[Evan Stade, 2017/05/24 17:47:53]

yes. This is not new. Our code is already doing this. You can compare addresses
because each icon only has one definition.

+                  other_badge);
+}
+
 const VectorIcon kNoneIcon = {};
 
 void PaintVectorIcon(Canvas* canvas,
                      const VectorIcon& icon,
                      SkColor color,
                      const base::TimeDelta& elapsed_time) {
   PaintVectorIcon(canvas, icon, GetDefaultSizeOfVectorIcon(icon), color,
                   elapsed_time);
 }
 
 void PaintVectorIcon(Canvas* canvas,
                      const VectorIcon& icon,
                      int dip_size,
                      SkColor color,
                      const base::TimeDelta& elapsed_time) {
   DCHECK(!icon.is_empty());
   const PathElement* path =
       (canvas->image_scale() == 1.f && icon.path_1x) ? icon.path_1x : icon.path;
   PaintPath(canvas, path, dip_size, color, elapsed_time);
 }
 
+ImageSkia CreateVectorIcon(const IconDescription& params) {
+  if (params.icon.is_empty())
+    return gfx::ImageSkia();
+
+  return g_icon_cache.Get().GetOrCreateIcon(params);
+}
+
 ImageSkia CreateVectorIcon(const VectorIcon& icon, SkColor color) {
   return CreateVectorIcon(icon, GetDefaultSizeOfVectorIcon(icon), color);
 }
 
 ImageSkia CreateVectorIcon(const VectorIcon& icon,
                            int dip_size,
                            SkColor color) {
-  return CreateVectorIconWithBadge(icon, dip_size, color, kNoneIcon);
+  return CreateVectorIcon(
+      IconDescription(icon, dip_size, color, base::TimeDelta(), kNoneIcon));
 }
 
 ImageSkia CreateVectorIconWithBadge(const VectorIcon& icon,
                                     int dip_size,
                                     SkColor color,
                                     const VectorIcon& badge_icon) {
-  return icon.is_empty() ? ImageSkia()
-                         : g_icon_cache.Get().GetOrCreateIcon(
-                               icon, dip_size, color, badge_icon);
+  return CreateVectorIcon(
+      IconDescription(icon, dip_size, color, base::TimeDelta(), badge_icon));
 }
 
 ImageSkia CreateVectorIconFromSource(const std::string& source,
                                      int dip_size,
                                      SkColor color) {
   return CanvasImageSource::MakeImageSkia<VectorIconSource>(source, dip_size,
                                                             color);
 }
 
 int GetDefaultSizeOfVectorIcon(const VectorIcon& icon) {
@@ skipping 11 matching lines @@
 
     auto end_time = base::TimeDelta::FromMillisecondsD(parser.GetArgument(0)) +
                     base::TimeDelta::FromMillisecondsD(parser.GetArgument(1));
     if (end_time > last_motion)
       last_motion = end_time;
   }
   return last_motion;
 }
 
 }  // namespace gfx