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view.cc
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// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "views/view.h"
#include <algorithm>
#ifndef NDEBUG
#include <iostream>
#endif
#include "app/drag_drop_types.h"
#include "app/gfx/canvas.h"
#include "app/gfx/path.h"
#include "app/l10n_util.h"
#include "base/logging.h"
#include "base/message_loop.h"
#include "base/scoped_handle.h"
#include "base/string_util.h"
#include "third_party/skia/include/core/SkShader.h"
#include "views/background.h"
#include "views/layout_manager.h"
#include "views/views_delegate.h"
#include "views/widget/root_view.h"
#include "views/widget/tooltip_manager.h"
#include "views/widget/widget.h"
#include "views/window/window.h"
#if defined(OS_WIN)
#include "views/accessibility/view_accessibility_wrapper.h"
#endif
namespace views {
// static
ViewsDelegate* ViewsDelegate::views_delegate = NULL;
// static
char View::kViewClassName[] = "views/View";
/////////////////////////////////////////////////////////////////////////////
//
// View - constructors, destructors, initialization
//
/////////////////////////////////////////////////////////////////////////////
View::View()
: id_(0),
group_(-1),
enabled_(true),
focusable_(false),
bounds_(0, 0, 0, 0),
parent_(NULL),
is_visible_(true),
is_parent_owned_(true),
notify_when_visible_bounds_in_root_changes_(false),
registered_for_visible_bounds_notification_(false),
next_focusable_view_(NULL),
previous_focusable_view_(NULL),
registered_accelerator_count_(0),
context_menu_controller_(NULL),
#if defined(OS_WIN)
accessibility_(NULL),
#endif
drag_controller_(NULL),
ui_mirroring_is_enabled_for_rtl_languages_(true),
flip_canvas_on_paint_for_rtl_ui_(false) {
}
View::~View() {
int c = static_cast<int>(child_views_.size());
while (--c >= 0) {
if (child_views_[c]->IsParentOwned())
delete child_views_[c];
else
child_views_[c]->SetParent(NULL);
}
}
/////////////////////////////////////////////////////////////////////////////
//
// View - sizing
//
/////////////////////////////////////////////////////////////////////////////
gfx::Rect View::GetBounds(PositionMirroringSettings settings) const {
gfx::Rect bounds(bounds_);
// If the parent uses an RTL UI layout and if we are asked to transform the
// bounds to their mirrored position if necessary, then we should shift the
// rectangle appropriately.
if (settings == APPLY_MIRRORING_TRANSFORMATION)
bounds.set_x(MirroredX());
return bounds;
}
// y(), width() and height() are agnostic to the RTL UI layout of the
// parent view. x(), on the other hand, is not.
int View::GetX(PositionMirroringSettings settings) const {
return settings == IGNORE_MIRRORING_TRANSFORMATION ? x() : MirroredX();
}
void View::SetBounds(const gfx::Rect& bounds) {
if (bounds == bounds_)
return;
gfx::Rect prev = bounds_;
bounds_ = bounds;
DidChangeBounds(prev, bounds_);
RootView* root = GetRootView();
if (root) {
bool size_changed = prev.size() != bounds_.size();
bool position_changed = prev.origin() != bounds_.origin();
if (size_changed || position_changed)
root->ViewBoundsChanged(this, size_changed, position_changed);
}
}
gfx::Rect View::GetLocalBounds(bool include_border) const {
if (include_border || !border_.get())
return gfx::Rect(0, 0, width(), height());
gfx::Insets insets;
border_->GetInsets(&insets);
return gfx::Rect(insets.left(), insets.top(),
std::max(0, width() - insets.width()),
std::max(0, height() - insets.height()));
}
gfx::Point View::GetPosition() const {
return gfx::Point(GetX(APPLY_MIRRORING_TRANSFORMATION), y());
}
gfx::Size View::GetPreferredSize() {
if (layout_manager_.get())
return layout_manager_->GetPreferredSize(this);
return gfx::Size();
}
void View::SizeToPreferredSize() {
gfx::Size prefsize = GetPreferredSize();
if ((prefsize.width() != width()) || (prefsize.height() != height()))
SetBounds(x(), y(), prefsize.width(), prefsize.height());
}
void View::PreferredSizeChanged() {
if (parent_)
parent_->ChildPreferredSizeChanged(this);
}
gfx::Size View::GetMinimumSize() {
return GetPreferredSize();
}
int View::GetHeightForWidth(int w) {
if (layout_manager_.get())
return layout_manager_->GetPreferredHeightForWidth(this, w);
return GetPreferredSize().height();
}
void View::DidChangeBounds(const gfx::Rect& previous,
const gfx::Rect& current) {
Layout();
}
void View::ScrollRectToVisible(int x, int y, int width, int height) {
View* parent = GetParent();
// We must take RTL UI mirroring into account when adjusting the position of
// the region.
if (parent)
parent->ScrollRectToVisible(
GetX(APPLY_MIRRORING_TRANSFORMATION) + x, View::y() + y, width, height);
}
/////////////////////////////////////////////////////////////////////////////
//
// View - layout
//
/////////////////////////////////////////////////////////////////////////////
void View::Layout() {
// Layout child Views
if (layout_manager_.get()) {
layout_manager_->Layout(this);
SchedulePaint();
// TODO(beng): We believe the right thing to do here is return since the
// layout manager should be handling things, but it causes
// regressions (missing options from Options dialog and a hang
// in interactive_ui_tests).
}
// Lay out contents of child Views
int child_count = GetChildViewCount();
for (int i = 0; i < child_count; ++i) {
View* child = GetChildViewAt(i);
child->Layout();
}
}
LayoutManager* View::GetLayoutManager() const {
return layout_manager_.get();
}
void View::SetLayoutManager(LayoutManager* layout_manager) {
if (layout_manager_.get()) {
layout_manager_->Uninstalled(this);
}
layout_manager_.reset(layout_manager);
if (layout_manager_.get()) {
layout_manager_->Installed(this);
}
}
bool View::UILayoutIsRightToLeft() const {
return (ui_mirroring_is_enabled_for_rtl_languages_ &&
l10n_util::GetTextDirection() == l10n_util::RIGHT_TO_LEFT);
}
////////////////////////////////////////////////////////////////////////////////
//
// View - Right-to-left UI layout
//
////////////////////////////////////////////////////////////////////////////////
inline int View::MirroredX() const {
// TODO(beng): reimplement in terms of MirroredLeftPointForRect.
View* parent = GetParent();
if (parent && parent->UILayoutIsRightToLeft())
return parent->width() - x() - width();
return x();
}
int View::MirroredLeftPointForRect(const gfx::Rect& bounds) const {
if (!UILayoutIsRightToLeft()) {
return bounds.x();
}
return width() - bounds.x() - bounds.width();
}
////////////////////////////////////////////////////////////////////////////////
//
// View - states
//
////////////////////////////////////////////////////////////////////////////////
bool View::IsEnabled() const {
return enabled_;
}
void View::SetEnabled(bool state) {
if (enabled_ != state) {
enabled_ = state;
SchedulePaint();
}
}
bool View::IsFocusable() const {
return focusable_ && enabled_ && is_visible_;
}
void View::SetFocusable(bool focusable) {
focusable_ = focusable;
}
FocusManager* View::GetFocusManager() {
Widget* widget = GetWidget();
return widget ? widget->GetFocusManager() : NULL;
}
bool View::HasFocus() {
FocusManager* focus_manager = GetFocusManager();
if (focus_manager)
return focus_manager->GetFocusedView() == this;
return false;
}
void View::SetHotTracked(bool flag) {
}
/////////////////////////////////////////////////////////////////////////////
//
// View - painting
//
/////////////////////////////////////////////////////////////////////////////
void View::SchedulePaint(const gfx::Rect& r, bool urgent) {
if (!IsVisible())
return;
if (parent_) {
// Translate the requested paint rect to the parent's coordinate system
// then pass this notification up to the parent.
gfx::Rect paint_rect = r;
paint_rect.Offset(GetPosition());
parent_->SchedulePaint(paint_rect, urgent);
}
}
void View::SchedulePaint() {
SchedulePaint(GetLocalBounds(true), false);
}
void View::SchedulePaint(int x, int y, int w, int h) {
SchedulePaint(gfx::Rect(x, y, w, h), false);
}
void View::Paint(gfx::Canvas* canvas) {
PaintBackground(canvas);
PaintFocusBorder(canvas);
PaintBorder(canvas);
}
void View::PaintBackground(gfx::Canvas* canvas) {
if (background_.get())
background_->Paint(canvas, this);
}
void View::PaintBorder(gfx::Canvas* canvas) {
if (border_.get())
border_->Paint(*this, canvas);
}
void View::PaintFocusBorder(gfx::Canvas* canvas) {
if (HasFocus() && IsFocusable())
canvas->DrawFocusRect(0, 0, width(), height());
}
void View::PaintChildren(gfx::Canvas* canvas) {
int i, c;
for (i = 0, c = GetChildViewCount(); i < c; ++i) {
View* child = GetChildViewAt(i);
if (!child) {
NOTREACHED() << "Should not have a NULL child View for index in bounds";
continue;
}
child->ProcessPaint(canvas);
}
}
void View::ProcessPaint(gfx::Canvas* canvas) {
if (!IsVisible()) {
return;
}
// We're going to modify the canvas, save it's state first.
canvas->save();
// Paint this View and its children, setting the clip rect to the bounds
// of this View and translating the origin to the local bounds' top left
// point.
//
// Note that the X (or left) position we pass to ClipRectInt takes into
// consideration whether or not the view uses a right-to-left layout so that
// we paint our view in its mirrored position if need be.
if (canvas->ClipRectInt(MirroredX(), y(), width(), height())) {
// Non-empty clip, translate the graphics such that 0,0 corresponds to
// where this view is located (related to its parent).
canvas->TranslateInt(MirroredX(), y());
// Save the state again, so that any changes don't effect PaintChildren.
canvas->save();
// If the View we are about to paint requested the canvas to be flipped, we
// should change the transform appropriately.
bool flip_canvas = FlipCanvasOnPaintForRTLUI();
if (flip_canvas) {
canvas->TranslateInt(width(), 0);
canvas->ScaleInt(-1, 1);
canvas->save();
}
Paint(canvas);
// We must undo the canvas mirroring once the View is done painting so that
// we don't pass the canvas with the mirrored transform to Views that
// didn't request the canvas to be flipped.
if (flip_canvas) {
canvas->restore();
}
canvas->restore();
PaintChildren(canvas);
}
// Restore the canvas's original transform.
canvas->restore();
}
void View::PaintNow() {
if (!IsVisible()) {
return;
}
View* view = GetParent();
if (view)
view->PaintNow();
}
gfx::Insets View::GetInsets() const {
gfx::Insets insets;
if (border_.get())
border_->GetInsets(&insets);
return insets;
}
gfx::NativeCursor View::GetCursorForPoint(Event::EventType event_type, int x,
int y) {
return NULL;
}
bool View::HitTest(const gfx::Point& l) const {
if (l.x() >= 0 && l.x() < static_cast<int>(width()) &&
l.y() >= 0 && l.y() < static_cast<int>(height())) {
if (HasHitTestMask()) {
gfx::Path mask;
GetHitTestMask(&mask);
#if defined(OS_WIN)
ScopedHRGN rgn(mask.CreateHRGN());
return !!PtInRegion(rgn, l.x(), l.y());
#elif defined(OS_LINUX)
GdkRegion* region = mask.CreateGdkRegion();
bool result = gdk_region_point_in(region, l.x(), l.y());
gdk_region_destroy(region);
return result;
#endif
}
// No mask, but inside our bounds.
return true;
}
// Outside our bounds.
return false;
}
void View::SetContextMenuController(ContextMenuController* menu_controller) {
context_menu_controller_ = menu_controller;
}
void View::ShowContextMenu(int x, int y, bool is_mouse_gesture) {
if (!context_menu_controller_)
return;
context_menu_controller_->ShowContextMenu(this, x, y, is_mouse_gesture);
}
/////////////////////////////////////////////////////////////////////////////
//
// View - tree
//
/////////////////////////////////////////////////////////////////////////////
bool View::ProcessMousePressed(const MouseEvent& e, DragInfo* drag_info) {
const bool enabled = enabled_;
int drag_operations;
if (enabled && e.IsOnlyLeftMouseButton() && HitTest(e.location()))
drag_operations = GetDragOperations(e.x(), e.y());
else
drag_operations = 0;
ContextMenuController* context_menu_controller =
e.IsRightMouseButton() ? context_menu_controller_ : 0;
const bool result = OnMousePressed(e);
// WARNING: we may have been deleted, don't use any View variables;
if (!enabled)
return result;
if (drag_operations != DragDropTypes::DRAG_NONE) {
drag_info->PossibleDrag(e.x(), e.y());
return true;
}
return !!context_menu_controller || result;
}
bool View::ProcessMouseDragged(const MouseEvent& e, DragInfo* drag_info) {
// Copy the field, that way if we're deleted after drag and drop no harm is
// done.
ContextMenuController* context_menu_controller = context_menu_controller_;
const bool possible_drag = drag_info->possible_drag;
if (possible_drag && ExceededDragThreshold(drag_info->start_x - e.x(),
drag_info->start_y - e.y())) {
DoDrag(e, drag_info->start_x, drag_info->start_y);
} else {
if (OnMouseDragged(e))
return true;
// Fall through to return value based on context menu controller.
}
// WARNING: we may have been deleted.
return (context_menu_controller != NULL) || possible_drag;
}
void View::ProcessMouseReleased(const MouseEvent& e, bool canceled) {
if (!canceled && context_menu_controller_ && e.IsOnlyRightMouseButton()) {
// Assume that if there is a context menu controller we won't be deleted
// from mouse released.
gfx::Point location(e.location());
OnMouseReleased(e, canceled);
if (HitTest(location)) {
ConvertPointToScreen(this, &location);
ShowContextMenu(location.x(), location.y(), true);
}
} else {
OnMouseReleased(e, canceled);
}
// WARNING: we may have been deleted.
}
void View::AddChildView(View* v) {
AddChildView(static_cast<int>(child_views_.size()), v);
}
void View::AddChildView(int index, View* v) {
// Remove the view from its current parent if any.
if (v->GetParent())
v->GetParent()->RemoveChildView(v);
// Sets the prev/next focus views.
InitFocusSiblings(v, index);
// Let's insert the view.
child_views_.insert(child_views_.begin() + index, v);
v->SetParent(this);
for (View* p = this; p; p = p->GetParent()) {
p->ViewHierarchyChangedImpl(false, true, this, v);
}
v->PropagateAddNotifications(this, v);
UpdateTooltip();
RootView* root = GetRootView();
if (root)
RegisterChildrenForVisibleBoundsNotification(root, v);
if (layout_manager_.get())
layout_manager_->ViewAdded(this, v);
}
View* View::GetChildViewAt(int index) const {
return index < GetChildViewCount() ? child_views_[index] : NULL;
}
int View::GetChildViewCount() const {
return static_cast<int>(child_views_.size());
}
void View::RemoveChildView(View* a_view) {
DoRemoveChildView(a_view, true, true, false);
}
void View::RemoveAllChildViews(bool delete_views) {
ViewList::iterator iter;
while ((iter = child_views_.begin()) != child_views_.end()) {
DoRemoveChildView(*iter, false, false, delete_views);
}
UpdateTooltip();
}
void View::DoRemoveChildView(View* a_view,
bool update_focus_cycle,
bool update_tool_tip,
bool delete_removed_view) {
#ifndef NDEBUG
DCHECK(!IsProcessingPaint()) << "Should not be removing a child view " <<
"during a paint, this will seriously " <<
"mess things up!";
#endif
DCHECK(a_view);
const ViewList::iterator i = find(child_views_.begin(),
child_views_.end(),
a_view);
if (i != child_views_.end()) {
if (update_focus_cycle) {
// Let's remove the view from the focus traversal.
View* next_focusable = a_view->next_focusable_view_;
View* prev_focusable = a_view->previous_focusable_view_;
if (prev_focusable)
prev_focusable->next_focusable_view_ = next_focusable;
if (next_focusable)
next_focusable->previous_focusable_view_ = prev_focusable;
}
RootView* root = GetRootView();
if (root)
UnregisterChildrenForVisibleBoundsNotification(root, a_view);
a_view->PropagateRemoveNotifications(this);
a_view->SetParent(NULL);
if (delete_removed_view && a_view->IsParentOwned())
delete a_view;
child_views_.erase(i);
}
if (update_tool_tip)
UpdateTooltip();
if (layout_manager_.get())
layout_manager_->ViewRemoved(this, a_view);
}
void View::PropagateRemoveNotifications(View* parent) {
int i, c;
for (i = 0, c = GetChildViewCount(); i < c; ++i) {
GetChildViewAt(i)->PropagateRemoveNotifications(parent);
}
View *t;
for (t = this; t; t = t->GetParent()) {
t->ViewHierarchyChangedImpl(true, false, parent, this);
}
}
void View::PropagateAddNotifications(View* parent, View* child) {
int i, c;
for (i = 0, c = GetChildViewCount(); i < c; ++i) {
GetChildViewAt(i)->PropagateAddNotifications(parent, child);
}
ViewHierarchyChangedImpl(true, true, parent, child);
}
void View::ThemeChanged() {
int c = GetChildViewCount();
for (int i = c - 1; i >= 0; --i)
GetChildViewAt(i)->ThemeChanged();
}
#ifndef NDEBUG
bool View::IsProcessingPaint() const {
return GetParent() && GetParent()->IsProcessingPaint();
}
#endif
gfx::Point View::GetKeyboardContextMenuLocation() {
gfx::Rect vis_bounds = GetVisibleBounds();
gfx::Point screen_point(vis_bounds.x() + vis_bounds.width() / 2,
vis_bounds.y() + vis_bounds.height() / 2);
ConvertPointToScreen(this, &screen_point);
return screen_point;
}
bool View::HasHitTestMask() const {
return false;
}
void View::GetHitTestMask(gfx::Path* mask) const {
DCHECK(mask);
}
void View::ViewHierarchyChanged(bool is_add,
View* parent,
View* child) {
}
void View::ViewHierarchyChangedImpl(bool register_accelerators,
bool is_add,
View* parent,
View* child) {
if (register_accelerators) {
if (is_add) {
// If you get this registration, you are part of a subtree that has been
// added to the view hierarchy.
RegisterPendingAccelerators();
} else {
if (child == this)
UnregisterAccelerators();
}
}
ViewHierarchyChanged(is_add, parent, child);
}
void View::PropagateVisibilityNotifications(View* start, bool is_visible) {
int i, c;
for (i = 0, c = GetChildViewCount(); i < c; ++i) {
GetChildViewAt(i)->PropagateVisibilityNotifications(start, is_visible);
}
VisibilityChanged(start, is_visible);
}
void View::VisibilityChanged(View* starting_from, bool is_visible) {
}
void View::SetNotifyWhenVisibleBoundsInRootChanges(bool value) {
if (notify_when_visible_bounds_in_root_changes_ == value)
return;
notify_when_visible_bounds_in_root_changes_ = value;
RootView* root = GetRootView();
if (root) {
if (value)
root->RegisterViewForVisibleBoundsNotification(this);
else
root->UnregisterViewForVisibleBoundsNotification(this);
}
}
bool View::GetNotifyWhenVisibleBoundsInRootChanges() {
return notify_when_visible_bounds_in_root_changes_;
}
View* View::GetViewForPoint(const gfx::Point& point) {
// Walk the child Views recursively looking for the View that most
// tightly encloses the specified point.
for (int i = GetChildViewCount() - 1 ; i >= 0 ; --i) {
View* child = GetChildViewAt(i);
if (!child->IsVisible())
continue;
gfx::Point point_in_child_coords(point);
View::ConvertPointToView(this, child, &point_in_child_coords);
if (child->HitTest(point_in_child_coords))
return child->GetViewForPoint(point_in_child_coords);
}
return this;
}
Widget* View::GetWidget() const {
// The root view holds a reference to this view hierarchy's Widget.
return parent_ ? parent_->GetWidget() : NULL;
}
Window* View::GetWindow() const {
Widget* widget = GetWidget();
return widget ? widget->GetWindow() : NULL;
}
// Get the containing RootView
RootView* View::GetRootView() {
Widget* widget = GetWidget();
return widget ? widget->GetRootView() : NULL;
}
View* View::GetViewByID(int id) const {
if (id == id_)
return const_cast<View*>(this);
int view_count = GetChildViewCount();
for (int i = 0; i < view_count; ++i) {
View* child = GetChildViewAt(i);
View* view = child->GetViewByID(id);
if (view)
return view;
}
return NULL;
}
void View::GetViewsWithGroup(int group_id, std::vector<View*>* out) {
if (group_ == group_id)
out->push_back(this);
int view_count = GetChildViewCount();
for (int i = 0; i < view_count; ++i)
GetChildViewAt(i)->GetViewsWithGroup(group_id, out);
}
View* View::GetSelectedViewForGroup(int group_id) {
std::vector<View*> views;
GetRootView()->GetViewsWithGroup(group_id, &views);
if (views.size() > 0)
return views[0];
else
return NULL;
}
void View::SetID(int id) {
id_ = id;
}
int View::GetID() const {
return id_;
}
void View::SetGroup(int gid) {
group_ = gid;
}
int View::GetGroup() const {
return group_;
}
void View::SetParent(View* parent) {
if (parent != parent_) {
parent_ = parent;
}
}
bool View::IsParentOf(View* v) const {
DCHECK(v);
View* parent = v->GetParent();
while (parent) {
if (this == parent)
return true;
parent = parent->GetParent();
}
return false;
}
int View::GetChildIndex(View* v) const {
for (int i = 0; i < GetChildViewCount(); i++) {
if (v == GetChildViewAt(i))
return i;
}
return -1;
}
///////////////////////////////////////////////////////////////////////////////
//
// View - focus
//
///////////////////////////////////////////////////////////////////////////////
View* View::GetNextFocusableView() {
return next_focusable_view_;
}
View* View::GetPreviousFocusableView() {
return previous_focusable_view_;
}
void View::SetNextFocusableView(View* view) {
view->previous_focusable_view_ = this;
next_focusable_view_ = view;
}
void View::InitFocusSiblings(View* v, int index) {
int child_count = static_cast<int>(child_views_.size());
if (child_count == 0) {
v->next_focusable_view_ = NULL;
v->previous_focusable_view_ = NULL;
} else {
if (index == child_count) {
// We are inserting at the end, but the end of the child list may not be
// the last focusable element. Let's try to find an element with no next
// focusable element to link to.
View* last_focusable_view = NULL;
for (std::vector<View*>::iterator iter = child_views_.begin();
iter != child_views_.end(); ++iter) {
if (!(*iter)->next_focusable_view_) {
last_focusable_view = *iter;
break;
}
}
if (last_focusable_view == NULL) {
// Hum... there is a cycle in the focus list. Let's just insert ourself
// after the last child.
View* prev = child_views_[index - 1];
v->previous_focusable_view_ = prev;
v->next_focusable_view_ = prev->next_focusable_view_;
prev->next_focusable_view_->previous_focusable_view_ = v;
prev->next_focusable_view_ = v;
} else {
last_focusable_view->next_focusable_view_ = v;
v->next_focusable_view_ = NULL;
v->previous_focusable_view_ = last_focusable_view;
}
} else {
View* prev = child_views_[index]->GetPreviousFocusableView();
v->previous_focusable_view_ = prev;
v->next_focusable_view_ = child_views_[index];
if (prev)
prev->next_focusable_view_ = v;
child_views_[index]->previous_focusable_view_ = v;
}
}
}
#ifndef NDEBUG
void View::PrintViewHierarchy() {
PrintViewHierarchyImp(0);
}
void View::PrintViewHierarchyImp(int indent) {
std::wostringstream buf;
int ind = indent;
while (ind-- > 0)
buf << L' ';
buf << UTF8ToWide(GetClassName());
buf << L' ';
buf << GetID();
buf << L' ';
buf << bounds_.x() << L"," << bounds_.y() << L",";
buf << bounds_.right() << L"," << bounds_.bottom();
buf << L' ';
buf << this;
LOG(INFO) << buf.str();
std::cout << buf.str() << std::endl;
for (int i = 0; i < GetChildViewCount(); ++i) {
GetChildViewAt(i)->PrintViewHierarchyImp(indent + 2);
}
}
void View::PrintFocusHierarchy() {
PrintFocusHierarchyImp(0);
}
void View::PrintFocusHierarchyImp(int indent) {
std::wostringstream buf;
int ind = indent;
while (ind-- > 0)
buf << L' ';
buf << UTF8ToWide(GetClassName());
buf << L' ';
buf << GetID();
buf << L' ';
buf << GetClassName().c_str();
buf << L' ';
buf << this;
LOG(INFO) << buf.str();
std::cout << buf.str() << std::endl;
if (GetChildViewCount() > 0)
GetChildViewAt(0)->PrintFocusHierarchyImp(indent + 2);
View* v = GetNextFocusableView();
if (v)
v->PrintFocusHierarchyImp(indent);
}
#endif
////////////////////////////////////////////////////////////////////////////////
//
// View - accelerators
//
////////////////////////////////////////////////////////////////////////////////
void View::AddAccelerator(const Accelerator& accelerator) {
if (!accelerators_.get())
accelerators_.reset(new std::vector<Accelerator>());
std::vector<Accelerator>::iterator iter =
std::find(accelerators_->begin(), accelerators_->end(), accelerator);
DCHECK(iter == accelerators_->end())
<< "Registering the same accelerator multiple times";
accelerators_->push_back(accelerator);
RegisterPendingAccelerators();
}
void View::RemoveAccelerator(const Accelerator& accelerator) {
std::vector<Accelerator>::iterator iter;
if (!accelerators_.get() ||
((iter = std::find(accelerators_->begin(), accelerators_->end(),
accelerator)) == accelerators_->end())) {
NOTREACHED() << "Removing non-existing accelerator";
return;
}
size_t index = iter - accelerators_->begin();
accelerators_->erase(iter);
if (index >= registered_accelerator_count_) {
// The accelerator is not registered to FocusManager.
return;
}
--registered_accelerator_count_;
RootView* root_view = GetRootView();
if (!root_view) {
// We are not part of a view hierarchy, so there is nothing to do as we
// removed ourselves from accelerators_, we won't be registered when added
// to one.
return;
}
// TODO(port): Fix this once we have a FocusManger for Linux.
#if defined(OS_WIN)
FocusManager* focus_manager = GetFocusManager();
if (focus_manager) {
// We may not have a FocusManager if the window containing us is being
// closed, in which case the FocusManager is being deleted so there is
// nothing to unregister.
focus_manager->UnregisterAccelerator(accelerator, this);
}
#endif
}
void View::ResetAccelerators() {
if (accelerators_.get())
UnregisterAccelerators();
}
void View::RegisterPendingAccelerators() {
if (!accelerators_.get() ||
registered_accelerator_count_ == accelerators_->size()) {
// No accelerators are waiting for registration.
return;
}
RootView* root_view = GetRootView();
if (!root_view) {
// We are not yet part of a view hierarchy, we'll register ourselves once
// added to one.
return;
}
FocusManager* focus_manager = GetFocusManager();
if (!focus_manager) {
// Some crash reports seem to show that we may get cases where we have no