1// Copyright (c) 2011 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/chromeos/frame/bubble_window.h"
6
7#include <gtk/gtk.h>
8
9#include "chrome/browser/chromeos/frame/bubble_frame_view.h"
10#include "chrome/browser/chromeos/wm_ipc.h"
11#include "third_party/cros/chromeos_wm_ipc_enums.h"
12#include "ui/gfx/skia_utils_gtk.h"
13#include "views/window/non_client_view.h"
14
15namespace {
16
17bool IsInsideCircle(int x0, int y0, int x1, int y1, int r) {
18  return (x0 - x1) * (x0 - x1) + (y0 - y1) * (y0 - y1) <= r * r;
19}
20
21void SetRegionUnionWithPoint(int i, int j, GdkRegion* region) {
22  GdkRectangle rect = {i, j, 1, 1};
23  gdk_region_union_with_rect(region, &rect);
24}
25
26}  // namespace
27
28namespace chromeos {
29
30// static
31const SkColor BubbleWindow::kBackgroundColor = SK_ColorWHITE;
32
33BubbleWindow::BubbleWindow(views::WindowDelegate* window_delegate)
34    : views::WindowGtk(window_delegate) {
35  MakeTransparent();
36}
37
38void BubbleWindow::InitWindow(GtkWindow* parent, const gfx::Rect& bounds) {
39  views::WindowGtk::InitWindow(parent, bounds);
40
41  // Turn on double buffering so that the hosted GtkWidgets does not
42  // flash as in http://crosbug.com/9065.
43  EnableDoubleBuffer(true);
44
45  GdkColor background_color = gfx::SkColorToGdkColor(kBackgroundColor);
46  gtk_widget_modify_bg(GetNativeView(), GTK_STATE_NORMAL, &background_color);
47
48  // A work-around for http://crosbug.com/8538. All GdkWidnow of top-level
49  // GtkWindow should participate _NET_WM_SYNC_REQUEST protocol and window
50  // manager should only show the window after getting notified. And we
51  // should only notify window manager after at least one paint is done.
52  // TODO(xiyuan): Figure out the right fix.
53  gtk_widget_realize(GetNativeView());
54  gdk_window_set_back_pixmap(GetNativeView()->window, NULL, FALSE);
55  gtk_widget_realize(window_contents());
56  gdk_window_set_back_pixmap(window_contents()->window, NULL, FALSE);
57}
58
59void BubbleWindow::TrimMargins(int margin_left, int margin_right,
60                               int margin_top, int margin_bottom,
61                               int border_radius) {
62  gfx::Size size = non_client_view()->GetPreferredSize();
63  const int w = size.width() - margin_left - margin_right;
64  const int h = size.height() - margin_top - margin_bottom;
65  GdkRectangle rect0 = {0, border_radius, w, h - 2 * border_radius};
66  GdkRectangle rect1 = {border_radius, 0, w - 2 * border_radius, h};
67  GdkRegion* region = gdk_region_rectangle(&rect0);
68  gdk_region_union_with_rect(region, &rect1);
69
70  // Top Left
71  for (int i = 0; i < border_radius; ++i) {
72    for (int j = 0; j < border_radius; ++j) {
73      if (IsInsideCircle(i + 0.5, j + 0.5, border_radius, border_radius,
74                         border_radius)) {
75        SetRegionUnionWithPoint(i, j, region);
76      }
77    }
78  }
79  // Top Right
80  for (int i = w - border_radius - 1; i < w; ++i) {
81    for (int j = 0; j < border_radius; ++j) {
82      if (IsInsideCircle(i + 0.5, j + 0.5, w - border_radius - 1,
83                         border_radius, border_radius)) {
84        SetRegionUnionWithPoint(i, j, region);
85      }
86    }
87  }
88  // Bottom Left
89  for (int i = 0; i < border_radius; ++i) {
90    for (int j = h - border_radius - 1; j < h; ++j) {
91      if (IsInsideCircle(i + 0.5, j + 0.5, border_radius, h - border_radius - 1,
92                         border_radius)) {
93        SetRegionUnionWithPoint(i, j, region);
94      }
95    }
96  }
97  // Bottom Right
98  for (int i = w - border_radius - 1; i < w; ++i) {
99    for (int j = h - border_radius - 1; j < h; ++j) {
100      if (IsInsideCircle(i + 0.5, j + 0.5, w - border_radius - 1,
101                         h - border_radius - 1, border_radius)) {
102        SetRegionUnionWithPoint(i, j, region);
103      }
104    }
105  }
106
107  gdk_window_shape_combine_region(window_contents()->window, region,
108                                  margin_left, margin_top);
109  gdk_region_destroy(region);
110}
111
112views::Window* BubbleWindow::Create(
113    gfx::NativeWindow parent,
114    const gfx::Rect& bounds,
115    Style style,
116    views::WindowDelegate* window_delegate) {
117  BubbleWindow* window = new BubbleWindow(window_delegate);
118  window->non_client_view()->SetFrameView(new BubbleFrameView(window, style));
119  window->InitWindow(parent, bounds);
120
121  if (style == STYLE_XSHAPE) {
122    const int kMarginLeft = 14;
123    const int kMarginRight = 14;
124    const int kMarginTop = 12;
125    const int kMarginBottom = 16;
126    const int kBorderRadius = 8;
127    window->TrimMargins(kMarginLeft, kMarginRight, kMarginTop, kMarginBottom,
128                        kBorderRadius);
129  }
130
131  return window;
132}
133
134}  // namespace chromeos
135