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 "ui/views/border.h"
6
7#include "base/logging.h"
8#include "base/memory/scoped_ptr.h"
9#include "ui/gfx/canvas.h"
10#include "ui/views/painter.h"
11#include "ui/views/view.h"
12
13namespace views {
14
15namespace {
16
17// A simple border with different thicknesses on each side and single color.
18class SidedSolidBorder : public Border {
19 public:
20  SidedSolidBorder(int top, int left, int bottom, int right, SkColor color);
21
22  // Overridden from Border:
23  virtual void Paint(const View& view, gfx::Canvas* canvas) OVERRIDE;
24  virtual gfx::Insets GetInsets() const OVERRIDE;
25  virtual gfx::Size GetMinimumSize() const OVERRIDE;
26
27 private:
28  const SkColor color_;
29  const gfx::Insets insets_;
30
31  DISALLOW_COPY_AND_ASSIGN(SidedSolidBorder);
32};
33
34SidedSolidBorder::SidedSolidBorder(int top,
35                                   int left,
36                                   int bottom,
37                                   int right,
38                                   SkColor color)
39    : color_(color),
40      insets_(top, left, bottom, right) {
41}
42
43void SidedSolidBorder::Paint(const View& view, gfx::Canvas* canvas) {
44  // Top border.
45  canvas->FillRect(gfx::Rect(0, 0, view.width(), insets_.top()), color_);
46  // Left border.
47  canvas->FillRect(gfx::Rect(0, 0, insets_.left(), view.height()), color_);
48  // Bottom border.
49  canvas->FillRect(gfx::Rect(0, view.height() - insets_.bottom(), view.width(),
50                             insets_.bottom()), color_);
51  // Right border.
52  canvas->FillRect(gfx::Rect(view.width() - insets_.right(), 0, insets_.right(),
53                             view.height()), color_);
54}
55
56gfx::Insets SidedSolidBorder::GetInsets() const {
57  return insets_;
58}
59
60gfx::Size SidedSolidBorder::GetMinimumSize() const {
61  return gfx::Size(insets_.width(), insets_.height());
62}
63
64// A variation of SidedSolidBorder, where each side has the same thickness.
65class SolidBorder : public SidedSolidBorder {
66 public:
67  SolidBorder(int thickness, SkColor color)
68      : SidedSolidBorder(thickness, thickness, thickness, thickness, color) {
69  }
70
71 private:
72  DISALLOW_COPY_AND_ASSIGN(SolidBorder);
73};
74
75class EmptyBorder : public Border {
76 public:
77  EmptyBorder(int top, int left, int bottom, int right)
78      : insets_(top, left, bottom, right) {}
79
80  // Overridden from Border:
81  virtual void Paint(const View& view, gfx::Canvas* canvas) OVERRIDE {}
82
83  virtual gfx::Insets GetInsets() const OVERRIDE {
84    return insets_;
85  }
86
87  virtual gfx::Size GetMinimumSize() const OVERRIDE {
88    return gfx::Size();
89  }
90
91 private:
92  const gfx::Insets insets_;
93
94  DISALLOW_COPY_AND_ASSIGN(EmptyBorder);
95};
96
97class BorderPainter : public Border {
98 public:
99  explicit BorderPainter(Painter* painter, const gfx::Insets& insets)
100      : painter_(painter),
101        insets_(insets) {
102    DCHECK(painter);
103  }
104
105  virtual ~BorderPainter() {}
106
107  // Overridden from Border:
108  virtual void Paint(const View& view, gfx::Canvas* canvas) OVERRIDE {
109    Painter::PaintPainterAt(canvas, painter_.get(), view.GetLocalBounds());
110  }
111
112  virtual gfx::Insets GetInsets() const OVERRIDE {
113    return insets_;
114  }
115
116  virtual gfx::Size GetMinimumSize() const OVERRIDE {
117    return painter_->GetMinimumSize();
118  }
119
120 private:
121  scoped_ptr<Painter> painter_;
122  const gfx::Insets insets_;
123
124  DISALLOW_COPY_AND_ASSIGN(BorderPainter);
125};
126
127}  // namespace
128
129Border::Border() {
130}
131
132Border::~Border() {
133}
134
135// static
136scoped_ptr<Border> Border::NullBorder() {
137  return scoped_ptr<Border>();
138}
139
140// static
141scoped_ptr<Border> Border::CreateSolidBorder(int thickness, SkColor color) {
142  return scoped_ptr<Border>(new SolidBorder(thickness, color));
143}
144
145// static
146scoped_ptr<Border> Border::CreateEmptyBorder(int top,
147                                             int left,
148                                             int bottom,
149                                             int right) {
150  return scoped_ptr<Border>(new EmptyBorder(top, left, bottom, right));
151}
152
153// static
154scoped_ptr<Border> Border::CreateSolidSidedBorder(int top,
155                                                  int left,
156                                                  int bottom,
157                                                  int right,
158                                                  SkColor color) {
159  return scoped_ptr<Border>(
160      new SidedSolidBorder(top, left, bottom, right, color));
161}
162
163// static
164scoped_ptr<Border> Border::CreateBorderPainter(Painter* painter,
165                                               const gfx::Insets& insets) {
166  return scoped_ptr<Border>(new BorderPainter(painter, insets));
167}
168
169}  // namespace views
170