infobar_view.cc revision ca12bfac764ba476d6cd062bf1dde12cc64c3f40 
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 "chrome/browser/ui/views/infobars/infobar_view.h"
6
7#if defined(OS_WIN)
8#include <shellapi.h>
9#endif
10
11#include <algorithm>
12
13#include "base/memory/scoped_ptr.h"
14#include "base/strings/utf_string_conversions.h"
15#include "chrome/browser/infobars/infobar_delegate.h"
16#include "chrome/browser/ui/views/infobars/infobar_background.h"
17#include "chrome/browser/ui/views/infobars/infobar_button_border.h"
18#include "chrome/browser/ui/views/infobars/infobar_label_button_border.h"
19#include "grit/generated_resources.h"
20#include "grit/theme_resources.h"
21#include "grit/ui_resources.h"
22#include "third_party/skia/include/effects/SkGradientShader.h"
23#include "ui/base/accessibility/accessible_view_state.h"
24#include "ui/base/l10n/l10n_util.h"
25#include "ui/base/resource/resource_bundle.h"
26#include "ui/gfx/canvas.h"
27#include "ui/gfx/image/image.h"
28#include "ui/views/controls/button/image_button.h"
29#include "ui/views/controls/button/label_button.h"
30#include "ui/views/controls/button/menu_button.h"
31#include "ui/views/controls/image_view.h"
32#include "ui/views/controls/label.h"
33#include "ui/views/controls/link.h"
34#include "ui/views/controls/menu/menu_runner.h"
35#include "ui/views/widget/widget.h"
36#include "ui/views/window/non_client_view.h"
37
38#if defined(OS_WIN)
39#include "base/win/win_util.h"
40#include "base/win/windows_version.h"
41#include "ui/base/win/hwnd_util.h"
42#include "ui/gfx/icon_util.h"
43#endif
44
45// static
46const int InfoBar::kSeparatorLineHeight =
47    views::NonClientFrameView::kClientEdgeThickness;
48const int InfoBar::kDefaultArrowTargetHeight = 9;
49const int InfoBar::kMaximumArrowTargetHeight = 24;
50const int InfoBar::kDefaultArrowTargetHalfWidth = kDefaultArrowTargetHeight;
51const int InfoBar::kMaximumArrowTargetHalfWidth = 14;
52const int InfoBar::kDefaultBarTargetHeight = 36;
53
54const int InfoBarView::kButtonButtonSpacing = 10;
55const int InfoBarView::kEndOfLabelSpacing = 16;
56const int InfoBarView::kHorizontalPadding = 6;
57
58InfoBarView::InfoBarView(InfoBarService* owner, InfoBarDelegate* delegate)
59    : InfoBar(owner, delegate),
60      views::ExternalFocusTracker(this, NULL),
61      icon_(NULL),
62      close_button_(NULL) {
63  set_owned_by_client();  // InfoBar deletes itself at the appropriate time.
64  set_background(new InfoBarBackground(InfoBar::delegate()->GetInfoBarType()));
65}
66
67InfoBarView::~InfoBarView() {
68  // We should have closed any open menus in PlatformSpecificHide(), then
69  // subclasses' RunMenu() functions should have prevented opening any new ones
70  // once we became unowned.
71  DCHECK(!menu_runner_.get());
72}
73
74views::Label* InfoBarView::CreateLabel(const string16& text) const {
75  ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
76  views::Label* label = new views::Label(text,
77      rb.GetFont(ui::ResourceBundle::MediumFont));
78  label->SetBackgroundColor(background()->get_color());
79  label->SetEnabledColor(SK_ColorBLACK);
80  label->SetHorizontalAlignment(gfx::ALIGN_LEFT);
81  return label;
82}
83
84views::Link* InfoBarView::CreateLink(const string16& text,
85                                     views::LinkListener* listener) const {
86  ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
87  views::Link* link = new views::Link;
88  link->SetText(text);
89  link->SetFont(rb.GetFont(ui::ResourceBundle::MediumFont));
90  link->SetHorizontalAlignment(gfx::ALIGN_LEFT);
91  link->set_listener(listener);
92  link->SetBackgroundColor(background()->get_color());
93  link->set_focusable(true);
94  return link;
95}
96
97// static
98views::MenuButton* InfoBarView::CreateMenuButton(
99    const string16& text,
100    views::MenuButtonListener* menu_button_listener) {
101  views::MenuButton* menu_button = new views::MenuButton(
102      NULL, text, menu_button_listener, true);
103  menu_button->set_border(new InfoBarButtonBorder);
104  menu_button->set_animate_on_state_change(false);
105  ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
106  menu_button->set_menu_marker(
107      rb.GetImageNamed(IDR_INFOBARBUTTON_MENU_DROPARROW).ToImageSkia());
108  menu_button->SetEnabledColor(SK_ColorBLACK);
109  menu_button->SetHoverColor(SK_ColorBLACK);
110  menu_button->SetFont(rb.GetFont(ui::ResourceBundle::MediumFont));
111  menu_button->set_focusable(true);
112  return menu_button;
113}
114
115// static
116views::LabelButton* InfoBarView::CreateLabelButton(
117    views::ButtonListener* listener,
118    const string16& text,
119    bool needs_elevation) {
120  views::LabelButton* label_button = new views::LabelButton(listener, text);
121  label_button->set_border(new InfoBarLabelButtonBorder);
122  label_button->set_animate_on_state_change(false);
123  label_button->SetTextColor(views::Button::STATE_NORMAL, SK_ColorBLACK);
124  label_button->SetTextColor(views::Button::STATE_HOVERED, SK_ColorBLACK);
125  ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
126  label_button->SetFont(rb.GetFont(ui::ResourceBundle::MediumFont));
127#if defined(OS_WIN)
128  if (needs_elevation &&
129      (base::win::GetVersion() >= base::win::VERSION_VISTA) &&
130      base::win::UserAccountControlIsEnabled()) {
131    SHSTOCKICONINFO icon_info = { sizeof(SHSTOCKICONINFO) };
132    // Even with the runtime guard above, we have to use GetProcAddress() here,
133    // because otherwise the loader will try to resolve the function address on
134    // startup, which will break on XP.
135    typedef HRESULT (STDAPICALLTYPE *GetStockIconInfo)(SHSTOCKICONID, UINT,
136                                                       SHSTOCKICONINFO*);
137    GetStockIconInfo func = reinterpret_cast<GetStockIconInfo>(
138        GetProcAddress(GetModuleHandle(L"shell32.dll"), "SHGetStockIconInfo"));
139    if (SUCCEEDED((*func)(SIID_SHIELD, SHGSI_ICON | SHGSI_SMALLICON,
140                          &icon_info))) {
141      scoped_ptr<SkBitmap> icon(IconUtil::CreateSkBitmapFromHICON(
142          icon_info.hIcon, gfx::Size(GetSystemMetrics(SM_CXSMICON),
143                                     GetSystemMetrics(SM_CYSMICON))));
144      if (icon.get()) {
145        label_button->SetImage(views::Button::STATE_NORMAL,
146                               gfx::ImageSkia::CreateFrom1xBitmap(*icon));
147      }
148      DestroyIcon(icon_info.hIcon);
149    }
150  }
151#endif
152  label_button->set_focusable(true);
153  return label_button;
154}
155
156void InfoBarView::Layout() {
157  // Calculate the fill and stroke paths.  We do this here, rather than in
158  // PlatformSpecificRecalculateHeight(), because this is also reached when our
159  // width is changed, which affects both paths.
160  stroke_path_.rewind();
161  fill_path_.rewind();
162  const InfoBarContainer::Delegate* delegate = container_delegate();
163  if (delegate) {
164    static_cast<InfoBarBackground*>(background())->set_separator_color(
165        delegate->GetInfoBarSeparatorColor());
166    int arrow_x;
167    SkScalar arrow_fill_height =
168        SkIntToScalar(std::max(arrow_height() - kSeparatorLineHeight, 0));
169    SkScalar arrow_fill_half_width = SkIntToScalar(arrow_half_width());
170    SkScalar separator_height = SkIntToScalar(kSeparatorLineHeight);
171    if (delegate->DrawInfoBarArrows(&arrow_x) && arrow_fill_height) {
172      // Skia pixel centers are at the half-values, so the arrow is horizontally
173      // centered at |arrow_x| + 0.5.  Vertically, the stroke path is the center
174      // of the separator, while the fill path is a closed path that extends up
175      // through the entire height of the separator and down to the bottom of
176      // the arrow where it joins the bar.
177      stroke_path_.moveTo(
178          SkIntToScalar(arrow_x) + SK_ScalarHalf - arrow_fill_half_width,
179          SkIntToScalar(arrow_height()) - (separator_height * SK_ScalarHalf));
180      stroke_path_.rLineTo(arrow_fill_half_width, -arrow_fill_height);
181      stroke_path_.rLineTo(arrow_fill_half_width, arrow_fill_height);
182
183      fill_path_ = stroke_path_;
184      // Move the top of the fill path up to the top of the separator and then
185      // extend it down all the way through.
186      fill_path_.offset(0, -separator_height * SK_ScalarHalf);
187      // This 0.01 hack prevents the fill from filling more pixels on the right
188      // edge of the arrow than on the left.
189      const SkScalar epsilon = 0.01f;
190      fill_path_.rLineTo(-epsilon, 0);
191      fill_path_.rLineTo(0, separator_height);
192      fill_path_.rLineTo(epsilon - (arrow_fill_half_width * 2), 0);
193      fill_path_.close();
194    }
195  }
196  if (bar_height()) {
197    fill_path_.addRect(0.0, SkIntToScalar(arrow_height()),
198        SkIntToScalar(width()), SkIntToScalar(height() - kSeparatorLineHeight));
199  }
200
201  int start_x = kHorizontalPadding;
202  if (icon_ != NULL) {
203    gfx::Size icon_size = icon_->GetPreferredSize();
204    icon_->SetBounds(start_x, OffsetY(icon_size), icon_size.width(),
205                     icon_size.height());
206  }
207
208  gfx::Size button_size = close_button_->GetPreferredSize();
209  close_button_->SetBounds(std::max(start_x + ContentMinimumWidth(),
210      width() - kHorizontalPadding - button_size.width()), OffsetY(button_size),
211      button_size.width(), button_size.height());
212}
213
214void InfoBarView::ViewHierarchyChanged(
215    const ViewHierarchyChangedDetails& details) {
216  View::ViewHierarchyChanged(details);
217
218  if (details.is_add && (details.child == this) && (close_button_ == NULL)) {
219    gfx::Image image = delegate()->GetIcon();
220    if (!image.IsEmpty()) {
221      icon_ = new views::ImageView;
222      icon_->SetImage(image.ToImageSkia());
223      AddChildView(icon_);
224    }
225
226    close_button_ = new views::ImageButton(this);
227    ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
228    close_button_->SetImage(views::CustomButton::STATE_NORMAL,
229                            rb.GetImageNamed(IDR_CLOSE_1).ToImageSkia());
230    close_button_->SetImage(views::CustomButton::STATE_HOVERED,
231                            rb.GetImageNamed(IDR_CLOSE_1_H).ToImageSkia());
232    close_button_->SetImage(views::CustomButton::STATE_PRESSED,
233                            rb.GetImageNamed(IDR_CLOSE_1_P).ToImageSkia());
234    close_button_->SetAccessibleName(
235        l10n_util::GetStringUTF16(IDS_ACCNAME_CLOSE));
236    close_button_->set_focusable(true);
237    AddChildView(close_button_);
238  } else if ((close_button_ != NULL) && (details.parent == this) &&
239      (details.child != close_button_) && (close_button_->parent() == this) &&
240      (child_at(child_count() - 1) != close_button_)) {
241    // For accessibility, ensure the close button is the last child view.
242    RemoveChildView(close_button_);
243    AddChildView(close_button_);
244  }
245
246  // Ensure the infobar is tall enough to display its contents.
247  const int kMinimumVerticalPadding = 6;
248  int height = kDefaultBarTargetHeight;
249  for (int i = 0; i < child_count(); ++i) {
250    const int child_height = child_at(i)->GetPreferredSize().height();
251    height = std::max(height, child_height + kMinimumVerticalPadding);
252  }
253  SetBarTargetHeight(height);
254}
255
256void InfoBarView::PaintChildren(gfx::Canvas* canvas) {
257  canvas->Save();
258
259  // TODO(scr): This really should be the |fill_path_|, but the clipPath seems
260  // broken on non-Windows platforms (crbug.com/75154). For now, just clip to
261  // the bar bounds.
262  //
263  // canvas->sk_canvas()->clipPath(fill_path_);
264  DCHECK_EQ(total_height(), height())
265      << "Infobar piecewise heights do not match overall height";
266  canvas->ClipRect(gfx::Rect(0, arrow_height(), width(), bar_height()));
267  views::View::PaintChildren(canvas);
268  canvas->Restore();
269}
270
271void InfoBarView::ButtonPressed(views::Button* sender,
272                                const ui::Event& event) {
273  if (!owner())
274    return;  // We're closing; don't call anything, it might access the owner.
275  if (sender == close_button_) {
276    delegate()->InfoBarDismissed();
277    RemoveSelf();
278  }
279}
280
281int InfoBarView::ContentMinimumWidth() const {
282  return 0;
283}
284
285int InfoBarView::StartX() const {
286  // Ensure we don't return a value greater than EndX(), so children can safely
287  // set something's width to "EndX() - StartX()" without risking that being
288  // negative.
289  return std::min(EndX(),
290      ((icon_ != NULL) ? icon_->bounds().right() : 0) + kHorizontalPadding);
291}
292
293int InfoBarView::EndX() const {
294  const int kCloseButtonSpacing = 12;
295  return close_button_->x() - kCloseButtonSpacing;
296}
297
298const InfoBarContainer::Delegate* InfoBarView::container_delegate() const {
299  const InfoBarContainer* infobar_container = container();
300  return infobar_container ? infobar_container->delegate() : NULL;
301}
302
303void InfoBarView::RunMenuAt(ui::MenuModel* menu_model,
304                            views::MenuButton* button,
305                            views::MenuItemView::AnchorPosition anchor) {
306  DCHECK(owner());  // We'd better not open any menus while we're closing.
307  gfx::Point screen_point;
308  views::View::ConvertPointToScreen(button, &screen_point);
309  menu_runner_.reset(new views::MenuRunner(menu_model));
310  // Ignore the result since we don't need to handle a deleted menu specially.
311  ignore_result(menu_runner_->RunMenuAt(
312      GetWidget(), button, gfx::Rect(screen_point, button->size()), anchor,
313      ui::MENU_SOURCE_NONE, views::MenuRunner::HAS_MNEMONICS));
314}
315
316void InfoBarView::PlatformSpecificShow(bool animate) {
317  // If we gain focus, we want to restore it to the previously-focused element
318  // when we're hidden. So when we're in a Widget, create a focus tracker so
319  // that if we gain focus we'll know what the previously-focused element was.
320  SetFocusManager(GetFocusManager());
321
322  NotifyAccessibilityEvent(ui::AccessibilityTypes::EVENT_ALERT, true);
323}
324
325void InfoBarView::PlatformSpecificHide(bool animate) {
326  // Cancel any menus we may have open.  It doesn't make sense to leave them
327  // open while we're hidden, and if we're going to become unowned, we can't
328  // allow the user to choose any options and potentially call functions that
329  // try to access the owner.
330  menu_runner_.reset();
331
332  // It's possible to be called twice (once with |animate| true and once with it
333  // false); in this case the second SetFocusManager() call will silently no-op.
334  SetFocusManager(NULL);
335
336#if defined(OS_WIN) && !defined(USE_AURA)
337  if (!animate)
338    return;
339
340  // Do not restore focus (and active state with it) if some other top-level
341  // window became active.
342  views::Widget* widget = GetWidget();
343  if (!widget || ui::DoesWindowBelongToActiveWindow(widget->GetNativeView()))
344    FocusLastFocusedExternalView();
345#endif
346}
347
348void InfoBarView::PlatformSpecificOnHeightsRecalculated() {
349  // Ensure that notifying our container of our size change will result in a
350  // re-layout.
351  InvalidateLayout();
352}
353
354void InfoBarView::GetAccessibleState(ui::AccessibleViewState* state) {
355  if (delegate()) {
356    state->name = l10n_util::GetStringUTF16(
357        (delegate()->GetInfoBarType() == InfoBarDelegate::WARNING_TYPE) ?
358            IDS_ACCNAME_INFOBAR_WARNING : IDS_ACCNAME_INFOBAR_PAGE_ACTION);
359  }
360  state->role = ui::AccessibilityTypes::ROLE_ALERT;
361}
362
363gfx::Size InfoBarView::GetPreferredSize() {
364  return gfx::Size(0, total_height());
365}
366
367void InfoBarView::OnWillChangeFocus(View* focused_before, View* focused_now) {
368  views::ExternalFocusTracker::OnWillChangeFocus(focused_before, focused_now);
369
370  // This will trigger some screen readers to read the entire contents of this
371  // infobar.
372  if (focused_before && focused_now && !Contains(focused_before) &&
373      Contains(focused_now)) {
374    NotifyAccessibilityEvent(ui::AccessibilityTypes::EVENT_ALERT, true);
375  }
376}
377