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.
5 #include "ui/views/controls/link.h"
7 #include "build/build_config.h"
9 #include "base/logging.h"
10 #include "base/strings/utf_string_conversions.h"
11 #include "ui/base/accessibility/accessible_view_state.h"
12 #include "ui/events/event.h"
13 #include "ui/events/keycodes/keyboard_codes.h"
14 #include "ui/gfx/canvas.h"
15 #include "ui/gfx/color_utils.h"
16 #include "ui/gfx/font_list.h"
17 #include "ui/views/controls/link_listener.h"
20 #include "ui/base/cursor/cursor.h"
25 const char Link::kViewClassName[] = "Link";
27 Link::Link() : Label(base::string16()) {
31 Link::Link(const base::string16& title) : Label(title) {
38 SkColor Link::GetDefaultEnabledColor() {
40 return color_utils::GetSysSkColor(COLOR_HOTLIGHT);
42 return SkColorSetRGB(0, 51, 153);
46 const char* Link::GetClassName() const {
47 return kViewClassName;
50 gfx::NativeCursor Link::GetCursor(const ui::MouseEvent& event) {
52 return gfx::kNullCursor;
54 return ui::kCursorHand;
56 static HCURSOR g_hand_cursor = LoadCursor(NULL, IDC_HAND);
61 bool Link::HitTestRect(const gfx::Rect& rect) const {
62 // We need to allow clicks on the link. So we override the implementation in
63 // Label and use the default implementation of View.
64 return View::HitTestRect(rect);
67 bool Link::OnMousePressed(const ui::MouseEvent& event) {
69 (!event.IsLeftMouseButton() && !event.IsMiddleMouseButton()))
75 bool Link::OnMouseDragged(const ui::MouseEvent& event) {
76 SetPressed(enabled() &&
77 (event.IsLeftMouseButton() || event.IsMiddleMouseButton()) &&
78 HitTestPoint(event.location()));
82 void Link::OnMouseReleased(const ui::MouseEvent& event) {
83 // Change the highlight first just in case this instance is deleted
84 // while calling the controller
87 (event.IsLeftMouseButton() || event.IsMiddleMouseButton()) &&
88 HitTestPoint(event.location())) {
89 // Focus the link on click.
93 listener_->LinkClicked(this, event.flags());
97 void Link::OnMouseCaptureLost() {
101 bool Link::OnKeyPressed(const ui::KeyEvent& event) {
102 bool activate = ((event.key_code() == ui::VKEY_SPACE) ||
103 (event.key_code() == ui::VKEY_RETURN));
109 // Focus the link on key pressed.
113 listener_->LinkClicked(this, event.flags());
118 void Link::OnGestureEvent(ui::GestureEvent* event) {
122 if (event->type() == ui::ET_GESTURE_TAP_DOWN) {
124 } else if (event->type() == ui::ET_GESTURE_TAP) {
127 listener_->LinkClicked(this, event->flags());
135 bool Link::SkipDefaultKeyEventProcessing(const ui::KeyEvent& event) {
136 // Make sure we don't process space or enter as accelerators.
137 return (event.key_code() == ui::VKEY_SPACE) ||
138 (event.key_code() == ui::VKEY_RETURN);
141 void Link::GetAccessibleState(ui::AccessibleViewState* state) {
142 Label::GetAccessibleState(state);
143 state->role = ui::AccessibilityTypes::ROLE_LINK;
146 void Link::OnEnabledChanged() {
148 View::OnEnabledChanged();
151 void Link::OnFocus() {
153 // We render differently focused.
157 void Link::OnBlur() {
159 // We render differently focused.
163 void Link::SetFontList(const gfx::FontList& font_list) {
164 Label::SetFontList(font_list);
168 void Link::SetText(const base::string16& text) {
169 Label::SetText(text);
170 // Disable focusability for empty links. Otherwise Label::GetInsets() will
171 // give them an unconditional 1-px. inset on every side to allow for a focus
172 // border, when in this case we probably wanted zero width.
173 SetFocusable(!text.empty());
176 void Link::SetEnabledColor(SkColor color) {
177 requested_enabled_color_ = color;
179 Label::SetEnabledColor(requested_enabled_color_);
182 void Link::SetPressedColor(SkColor color) {
183 requested_pressed_color_ = color;
185 Label::SetEnabledColor(requested_pressed_color_);
188 void Link::SetUnderline(bool underline) {
189 if (underline_ == underline)
191 underline_ = underline;
199 SetEnabledColor(GetDefaultEnabledColor());
201 SetDisabledColor(color_utils::GetSysSkColor(COLOR_WINDOWTEXT));
202 SetPressedColor(SkColorSetRGB(200, 0, 0));
204 // TODO(beng): source from theme provider.
205 SetDisabledColor(SK_ColorBLACK);
206 SetPressedColor(SK_ColorRED);
210 // Label::Init() calls SetText(), but if that's being called from Label(), our
211 // SetText() override will not be reached (because the constructed class is
212 // only a Label at the moment, not yet a Link). So so the set_focusable()
213 // call explicitly here.
214 SetFocusable(!text().empty());
217 void Link::SetPressed(bool pressed) {
218 if (pressed_ != pressed) {
220 Label::SetEnabledColor(pressed_ ?
221 requested_pressed_color_ : requested_enabled_color_);
227 void Link::RecalculateFont() {
228 // Underline the link iff it is enabled and |underline_| is true.
229 const int style = font_list().GetFontStyle();
230 const int intended_style = (enabled() && underline_) ?
231 (style | gfx::Font::UNDERLINE) : (style & ~gfx::Font::UNDERLINE);
232 if (style != intended_style)
233 Label::SetFontList(font_list().DeriveWithStyle(intended_style));