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/location_bar/icon_label_bubble_view.h"
6
7#include "base/strings/utf_string_conversions.h"
8#include "chrome/browser/ui/views/location_bar/location_bar_view.h"
9#include "ui/base/resource/resource_bundle.h"
10#include "ui/gfx/canvas.h"
11#include "ui/gfx/color_utils.h"
12#include "ui/views/controls/image_view.h"
13#include "ui/views/painter.h"
14
15
16IconLabelBubbleView::IconLabelBubbleView(const int background_images[],
17                                         const int hover_background_images[],
18                                         int contained_image,
19                                         const gfx::FontList& font_list,
20                                         SkColor text_color,
21                                         SkColor parent_background_color,
22                                         bool elide_in_middle)
23    : background_painter_(
24          views::Painter::CreateImageGridPainter(background_images)),
25      image_(new views::ImageView()),
26      label_(new views::Label(base::string16(), font_list)),
27      is_extension_icon_(false),
28      in_hover_(false) {
29  image_->SetImage(
30      ui::ResourceBundle::GetSharedInstance().GetImageSkiaNamed(
31          contained_image));
32
33  // Disable separate hit testing for |image_|.  This prevents views treating
34  // |image_| as a separate mouse hover region from |this|.
35  image_->set_interactive(false);
36  AddChildView(image_);
37
38  if (hover_background_images) {
39    hover_background_painter_.reset(
40        views::Painter::CreateImageGridPainter(hover_background_images));
41  }
42
43  label_->SetEnabledColor(text_color);
44  // Calculate the actual background color for the label.  The background images
45  // are painted atop |parent_background_color|.  We grab the color of the
46  // middle pixel of the middle image of the background, which we treat as the
47  // representative color of the entire background (reasonable, given the
48  // current appearance of these images).  Then we alpha-blend it over the
49  // parent background color to determine the actual color the label text will
50  // sit atop.
51  const SkBitmap& bitmap(
52      ui::ResourceBundle::GetSharedInstance().GetImageSkiaNamed(
53          background_images[4])->GetRepresentation(1.0f).sk_bitmap());
54  SkAutoLockPixels pixel_lock(bitmap);
55  SkColor background_image_color =
56      bitmap.getColor(bitmap.width() / 2, bitmap.height() / 2);
57  // Tricky bit: We alpha blend an opaque version of |background_image_color|
58  // against |parent_background_color| using the original image grid color's
59  // alpha. This is because AlphaBlend(a, b, 255) always returns |a| unchanged
60  // even if |a| is a color with non-255 alpha.
61  label_->SetBackgroundColor(
62      color_utils::AlphaBlend(SkColorSetA(background_image_color, 255),
63                              parent_background_color,
64                              SkColorGetA(background_image_color)));
65  if (elide_in_middle)
66    label_->SetElideBehavior(gfx::ELIDE_MIDDLE);
67  AddChildView(label_);
68}
69
70IconLabelBubbleView::~IconLabelBubbleView() {
71}
72
73void IconLabelBubbleView::SetLabel(const base::string16& label) {
74  label_->SetText(label);
75}
76
77void IconLabelBubbleView::SetImage(const gfx::ImageSkia& image_skia) {
78  image_->SetImage(image_skia);
79}
80
81gfx::Size IconLabelBubbleView::GetPreferredSize() const {
82  // Height will be ignored by the LocationBarView.
83  return GetSizeForLabelWidth(label_->GetPreferredSize().width());
84}
85
86void IconLabelBubbleView::Layout() {
87  image_->SetBounds(GetBubbleOuterPadding(!is_extension_icon_), 0,
88                    image_->GetPreferredSize().width(), height());
89  const int pre_label_width = GetPreLabelWidth();
90  label_->SetBounds(pre_label_width, 0,
91                    width() - pre_label_width - GetBubbleOuterPadding(false),
92                    height());
93}
94
95gfx::Size IconLabelBubbleView::GetSizeForLabelWidth(int width) const {
96  gfx::Size size(GetPreLabelWidth() + width + GetBubbleOuterPadding(false), 0);
97  size.SetToMax(background_painter_->GetMinimumSize());
98  return size;
99}
100
101void IconLabelBubbleView::OnMouseEntered(const ui::MouseEvent& event) {
102  in_hover_ = true;
103  if (hover_background_painter_.get())
104    SchedulePaint();
105}
106
107void IconLabelBubbleView::OnMouseExited(const ui::MouseEvent& event) {
108  in_hover_ = false;
109  if (hover_background_painter_.get())
110    SchedulePaint();
111}
112
113// static
114int IconLabelBubbleView::GetBubbleOuterPadding(bool by_icon) {
115  return LocationBarView::kItemPadding - LocationBarView::kBubblePadding +
116      (by_icon ? 0 : LocationBarView::kIconInternalPadding);
117}
118
119void IconLabelBubbleView::OnPaint(gfx::Canvas* canvas) {
120  views::Painter* painter = (in_hover_ && hover_background_painter_) ?
121      hover_background_painter_.get() : background_painter_.get();
122  painter->Paint(canvas, size());
123}
124
125int IconLabelBubbleView::GetPreLabelWidth() const {
126  const int image_width = image_->GetPreferredSize().width();
127  return GetBubbleOuterPadding(true) +
128      (image_width ? (image_width + LocationBarView::kItemPadding) : 0);
129}
130