ash/frame/header_painter_util.cc

   1 // Copyright 2014 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 "ash/frame/header_painter_util.h"
   6
   7 #include <algorithm>
   8
   9 #include "ui/aura/window.h"
  10 #include "ui/compositor/layer.h"
  11 #include "ui/compositor/layer_animator.h"
  12 #include "ui/gfx/font_list.h"
  13 #include "ui/gfx/geometry/rect.h"
  14 #include "ui/views/view.h"
  15 #include "ui/views/widget/widget.h"
  16
  17 namespace {
  18
  19 // Radius of the header's top corners when the window is restored.
  20 const int kTopCornerRadiusWhenRestored = 2;
  21
  22 // Distance between left edge of the window and the leftmost view.
  23 const int kDefaultLeftViewXInset = 9;
  24
  25 // Space between the title text and the caption buttons.
  26 const int kTitleCaptionButtonSpacing = 5;
  27
  28 // Space between window icon and title text.
  29 const int kTitleIconOffsetX = 5;
  30
  31 // Space between window edge and title text, when there is no icon.
  32 const int kTitleNoIconOffsetX = 8;
  33
  34 // In the pre-Ash era the web content area had a frame along the left edge, so
  35 // user-generated theme images for the new tab page assume they are shifted
  36 // right relative to the header.  Now that we have removed the left edge frame
  37 // we need to copy the theme image for the window header from a few pixels
  38 // inset to preserve alignment with the NTP image, or else we'll break a bunch
  39 // of existing themes.  We do something similar on OS X for the same reason.
  40 const int kThemeFrameImageInsetX = 5;
  41
  42 }  // namespace
  43
  44 namespace ash {
  45
  46 // static
  47 int HeaderPainterUtil::GetTopCornerRadiusWhenRestored() {
  48   return kTopCornerRadiusWhenRestored;
  49 }
  50
  51 // static
  52 int HeaderPainterUtil::GetDefaultLeftViewXInset() {
  53   return kDefaultLeftViewXInset;
  54 }
  55
  56 // static
  57 int HeaderPainterUtil::GetThemeBackgroundXInset() {
  58   return kThemeFrameImageInsetX;
  59 }
  60
  61 // static
  62 gfx::Rect HeaderPainterUtil::GetTitleBounds(
  63     const views::View* left_view,
  64     const views::View* right_view,
  65     const gfx::FontList& title_font_list) {
  66   int x = left_view ? left_view->bounds().right() + kTitleIconOffsetX
  67                     : kTitleNoIconOffsetX;
  68   int height = title_font_list.GetHeight();
  69   // Floor when computing the center of |caption_button_container| and when
  70   // computing the center of the text.
  71   int y = std::max(0, (right_view->height() / 2) - (height / 2));
  72   int width = std::max(0, right_view->x() - kTitleCaptionButtonSpacing - x);
  73   return gfx::Rect(x, y, width, height);
  74 }
  75
  76 // static
  77 bool HeaderPainterUtil::CanAnimateActivation(views::Widget* widget) {
  78   // Do not animate the header if the parent (e.g.
  79   // kShellWindowId_DefaultContainer) is already animating. All of the
  80   // implementers of HeaderPainter animate activation by continuously painting
  81   // during the animation. This gives the parent's animation a slower frame
  82   // rate.
  83   // TODO(sky): Expose a better way to determine this rather than assuming the
  84   // parent is a toplevel container.
  85   aura::Window* window = widget->GetNativeWindow();
  86   if (!window->parent())
  87     return true;
  88
  89   ui::LayerAnimator* parent_layer_animator =
  90       window->parent()->layer()->GetAnimator();
  91   return !parent_layer_animator->IsAnimatingProperty(
  92              ui::LayerAnimationElement::OPACITY) &&
  93          !parent_layer_animator->IsAnimatingProperty(
  94              ui::LayerAnimationElement::VISIBILITY);
  95 }
  96
  97 }  // namespace ash