chrome/browser/ui/cocoa/location_bar/button_decoration.mm

   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 <cmath>
   6
   7 #import "chrome/browser/ui/cocoa/location_bar/button_decoration.h"
   8
   9 #include "base/logging.h"
  10 #import "base/mac/scoped_nsobject.h"
  11 #import "ui/base/cocoa/appkit_utils.h"
  12 #include "ui/base/resource/resource_bundle.h"
  13
  14 namespace {
  15
  16 NSImage* GetImageFromId(int image_id) {
  17   return ui::ResourceBundle::GetSharedInstance().GetNativeImageNamed(image_id)
  18       .ToNSImage();
  19 }
  20
  21 bool IsValidNinePartImageIds(const ui::NinePartImageIds& object) {
  22   return (object.top_left >= 0) &&
  23          (object.top >= 0) &&
  24          (object.top_right >= 0) &&
  25          (object.left >= 0) &&
  26          (object.center >= 0) &&
  27          (object.right >= 0) &&
  28          (object.bottom_left >= 0) &&
  29          (object.bottom >= 0) &&
  30          (object.bottom_right >= 0);
  31 }
  32
  33 }  // namespace
  34
  35 ButtonDecoration::ButtonDecoration(ui::NinePartImageIds normal_image_ids,
  36                                    int normal_icon_id,
  37                                    ui::NinePartImageIds hover_image_ids,
  38                                    int hover_icon_id,
  39                                    ui::NinePartImageIds pressed_image_ids,
  40                                    int pressed_icon_id,
  41                                    CGFloat max_inner_padding)
  42     : normal_image_ids_(normal_image_ids),
  43       hover_image_ids_(hover_image_ids),
  44       pressed_image_ids_(pressed_image_ids),
  45       normal_icon_id_(normal_icon_id),
  46       hover_icon_id_(hover_icon_id),
  47       pressed_icon_id_(pressed_icon_id),
  48       state_(kButtonStateNormal),
  49       max_inner_padding_(max_inner_padding) {
  50   DCHECK(IsValidNinePartImageIds(normal_image_ids_) && normal_icon_id_ >= 0);
  51   DCHECK(IsValidNinePartImageIds(hover_image_ids_) && hover_icon_id_ >= 0);
  52   DCHECK(IsValidNinePartImageIds(pressed_image_ids_) && pressed_icon_id_ >= 0);
  53   DCHECK_GE(max_inner_padding_, 0);
  54 }
  55
  56 ButtonDecoration::~ButtonDecoration() {
  57 }
  58
  59 void ButtonDecoration::SetButtonState(ButtonDecoration::ButtonState state) {
  60   state_ = state;
  61 }
  62
  63 ButtonDecoration::ButtonState ButtonDecoration::GetButtonState() const {
  64   return state_;
  65 }
  66
  67 void ButtonDecoration::SetIcon(ButtonState state, int icon_id) {
  68   switch (state) {
  69     case kButtonStateNormal:
  70       normal_icon_id_ = icon_id;
  71       break;
  72     case kButtonStateHover:
  73       hover_icon_id_ = icon_id;
  74       break;
  75     case kButtonStatePressed:
  76       pressed_icon_id_ = icon_id;
  77       break;
  78     default:
  79       NOTREACHED();
  80   }
  81 }
  82
  83 void ButtonDecoration::SetIcon(int icon_id) {
  84   normal_icon_id_ = icon_id;
  85   hover_icon_id_ = icon_id;
  86   pressed_icon_id_ = icon_id;
  87 }
  88
  89 CGFloat ButtonDecoration::GetWidthForSpace(CGFloat width) {
  90   const ui::NinePartImageIds image_ids = GetImageIds();
  91   NSImage* icon = GetImageFromId(GetIconId());
  92
  93   if (!icon)
  94     return kOmittedWidth;
  95
  96   const CGFloat min_width = [GetImageFromId(image_ids.left) size].width +
  97                             [icon size].width +
  98                             [GetImageFromId(image_ids.right) size].width;
  99   if (width < min_width)
 100     return kOmittedWidth;
 101
 102   const CGFloat max_width = min_width + 2 * max_inner_padding_;
 103   return std::min(width, max_width);
 104 }
 105
 106 void ButtonDecoration::DrawInFrame(NSRect frame, NSView* control_view) {
 107   const ui::NinePartImageIds image_ids = GetImageIds();
 108   NSImage* icon = GetImageFromId(GetIconId());
 109
 110   if (!icon)
 111     return;
 112
 113   ui::DrawNinePartImage(frame, image_ids, NSCompositeSourceOver, 1.0, YES);
 114
 115   const CGFloat x_inset =
 116       std::floor((NSWidth(frame) - [icon size].width) / 2.0);
 117   const CGFloat y_inset =
 118       std::floor((NSHeight(frame) - [icon size].height) / 2.0);
 119
 120   [icon drawInRect:NSInsetRect(frame, x_inset, y_inset)
 121           fromRect:NSZeroRect
 122          operation:NSCompositeSourceOver
 123           fraction:1.0
 124     respectFlipped:YES
 125              hints:nil];
 126 }
 127
 128 bool ButtonDecoration::AcceptsMousePress() {
 129   return true;
 130 }
 131
 132 bool ButtonDecoration::IsDraggable() {
 133   return false;
 134 }
 135
 136 bool ButtonDecoration::OnMousePressed(NSRect frame) {
 137   return false;
 138 }
 139
 140 ButtonDecoration* ButtonDecoration::AsButtonDecoration() {
 141   return this;
 142 }
 143
 144 ui::NinePartImageIds ButtonDecoration::GetImageIds() const {
 145   switch (state_) {
 146     case kButtonStateHover:
 147       return hover_image_ids_;
 148     case kButtonStatePressed:
 149       return pressed_image_ids_;
 150     case kButtonStateNormal:
 151     default:
 152       return normal_image_ids_;
 153   }
 154 }
 155
 156 int ButtonDecoration::GetIconId() const {
 157   switch (state_) {
 158     case kButtonStateHover:
 159       return hover_icon_id_;
 160     case kButtonStatePressed:
 161       return pressed_icon_id_;
 162     case kButtonStateNormal:
 163     default:
 164       return normal_icon_id_;
 165   }
 166 }