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/rect.h"
14#include "ui/views/view.h"
15#include "ui/views/widget/widget.h"
16
17namespace {
18
19// Radius of the header's top corners when the window is restored.
20const int kTopCornerRadiusWhenRestored = 2;
21
22// Distance between left edge of the window and the leftmost view.
23const int kDefaultLeftViewXInset = 9;
24
25// Space between the title text and the caption buttons.
26const int kTitleCaptionButtonSpacing = 5;
27
28// Space between window icon and title text.
29const int kTitleIconOffsetX = 5;
30
31// Space between window edge and title text, when there is no icon.
32const 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.
40const int kThemeFrameImageInsetX = 5;
41
42}  // namespace
43
44namespace ash {
45
46// static
47int HeaderPainterUtil::GetTopCornerRadiusWhenRestored() {
48  return kTopCornerRadiusWhenRestored;
49}
50
51// static
52int HeaderPainterUtil::GetDefaultLeftViewXInset() {
53  return kDefaultLeftViewXInset;
54}
55
56// static
57int HeaderPainterUtil::GetThemeBackgroundXInset() {
58  return kThemeFrameImageInsetX;
59}
60
61// static
62gfx::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
77bool 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
98