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/ui/views/infobars/infobar_background.h"
6
7#include "chrome/browser/ui/views/infobars/infobar_view.h"
8#include "ui/gfx/canvas.h"
9#include "ui/gfx/canvas_skia_paint.h"
10#include "third_party/skia/include/effects/SkGradientShader.h"
11#include "views/view.h"
12
13InfoBarBackground::InfoBarBackground(InfoBarDelegate::Type infobar_type)
14    : separator_color_(SK_ColorBLACK),
15      top_color_(GetTopColor(infobar_type)),
16      bottom_color_(GetBottomColor(infobar_type)) {
17}
18
19InfoBarBackground::~InfoBarBackground() {
20}
21
22SkColor InfoBarBackground::GetTopColor(InfoBarDelegate::Type infobar_type) {
23  static const SkColor kWarningBackgroundColorTop =
24      SkColorSetRGB(255, 242, 183);
25  static const SkColor kPageActionBackgroundColorTop =
26      SkColorSetRGB(218, 231, 249);
27
28  return (infobar_type == InfoBarDelegate::WARNING_TYPE) ?
29      kWarningBackgroundColorTop : kPageActionBackgroundColorTop;
30}
31
32SkColor InfoBarBackground::GetBottomColor(InfoBarDelegate::Type infobar_type) {
33  static const SkColor kWarningBackgroundColorBottom =
34      SkColorSetRGB(250, 230, 145);
35  static const SkColor kPageActionBackgroundColorBottom =
36      SkColorSetRGB(179, 202, 231);
37
38  return (infobar_type == InfoBarDelegate::WARNING_TYPE) ?
39      kWarningBackgroundColorBottom : kPageActionBackgroundColorBottom;
40}
41
42void InfoBarBackground::Paint(gfx::Canvas* canvas, views::View* view) const {
43  SkPoint gradient_points[2] = {
44    {SkIntToScalar(0), SkIntToScalar(0)},
45    {SkIntToScalar(0), SkIntToScalar(view->height())}
46  };
47  SkColor gradient_colors[2] = {
48    top_color_,
49    bottom_color_
50  };
51  SkShader* gradient_shader = SkGradientShader::CreateLinear(
52      gradient_points, gradient_colors, NULL, 2, SkShader::kClamp_TileMode);
53  SkPaint paint;
54  paint.setStrokeWidth(SkIntToScalar(InfoBar::kSeparatorLineHeight));
55  paint.setStyle(SkPaint::kFill_Style);
56  paint.setStrokeCap(SkPaint::kRound_Cap);
57  paint.setShader(gradient_shader);
58  gradient_shader->unref();
59
60  InfoBarView* infobar = static_cast<InfoBarView*>(view);
61  gfx::CanvasSkia* canvas_skia = canvas->AsCanvasSkia();
62  canvas_skia->drawPath(*infobar->fill_path(), paint);
63
64  paint.setShader(NULL);
65  paint.setColor(SkColorSetA(separator_color_,
66                             SkColorGetA(gradient_colors[0])));
67  paint.setStyle(SkPaint::kStroke_Style);
68  // Anti-alias the path so it doesn't look goofy when the edges are not at 45
69  // degree angles, but don't anti-alias anything else, especially not the fill,
70  // lest we get weird color bleeding problems.
71  paint.setAntiAlias(true);
72  canvas_skia->drawPath(*infobar->stroke_path(), paint);
73  paint.setAntiAlias(false);
74
75  // Now draw the separator at the bottom.
76  canvas->FillRectInt(separator_color_, 0,
77                      view->height() - InfoBar::kSeparatorLineHeight,
78                      view->width(), InfoBar::kSeparatorLineHeight);
79}
80