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Issue 8742030: views: Move view.h to ui/views/. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: rebase and fix conflicts Created 9 years ago
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1 // Copyright (c) 2011 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 "views/view.h"
6
7 #include <algorithm>
8
9 #include "base/debug/trace_event.h"
10 #include "base/logging.h"
11 #include "base/memory/scoped_ptr.h"
12 #include "base/message_loop.h"
13 #include "base/stringprintf.h"
14 #include "base/utf_string_conversions.h"
15 #include "third_party/skia/include/core/SkRect.h"
16 #include "ui/base/accessibility/accessibility_types.h"
17 #include "ui/base/dragdrop/drag_drop_types.h"
18 #include "ui/gfx/canvas_skia.h"
19 #include "ui/gfx/compositor/compositor.h"
20 #include "ui/gfx/compositor/layer.h"
21 #include "ui/gfx/compositor/layer_animator.h"
22 #include "ui/gfx/interpolated_transform.h"
23 #include "ui/gfx/path.h"
24 #include "ui/gfx/point3.h"
25 #include "ui/gfx/transform.h"
26 #include "ui/views/context_menu_controller.h"
27 #include "ui/views/drag_controller.h"
28 #include "ui/views/layout/layout_manager.h"
29 #include "ui/views/widget/native_widget_private.h"
30 #include "ui/views/widget/root_view.h"
31 #include "ui/views/widget/tooltip_manager.h"
32 #include "ui/views/widget/widget.h"
33 #include "views/background.h"
34 #include "views/views_delegate.h"
35
36 #if defined(OS_WIN)
37 #include "base/win/scoped_gdi_object.h"
38 #include "ui/views/accessibility/native_view_accessibility_win.h"
39 #endif
40 #if defined(TOOLKIT_USES_GTK)
41 #include "ui/base/gtk/scoped_handle_gtk.h"
42 #endif
43
44 namespace {
45
46 // Whether to use accelerated compositing when necessary (e.g. when a view has a
47 // transformation).
48 #if defined(VIEWS_COMPOSITOR)
49 bool use_acceleration_when_possible = true;
50 #else
51 bool use_acceleration_when_possible = false;
52 #endif
53
54 // Saves the drawing state, and restores the state when going out of scope.
55 class ScopedCanvas {
56 public:
57 explicit ScopedCanvas(gfx::Canvas* canvas) : canvas_(canvas) {
58 if (canvas_)
59 canvas_->Save();
60 }
61 ~ScopedCanvas() {
62 if (canvas_)
63 canvas_->Restore();
64 }
65 void SetCanvas(gfx::Canvas* canvas) {
66 if (canvas_)
67 canvas_->Restore();
68 canvas_ = canvas;
69 canvas_->Save();
70 }
71
72 private:
73 gfx::Canvas* canvas_;
74
75 DISALLOW_COPY_AND_ASSIGN(ScopedCanvas);
76 };
77
78 // Returns the top view in |view|'s hierarchy.
79 const views::View* GetHierarchyRoot(const views::View* view) {
80 const views::View* root = view;
81 while (root && root->parent())
82 root = root->parent();
83 return root;
84 }
85
86 } // namespace
87
88 namespace views {
89
90 // static
91 ViewsDelegate* ViewsDelegate::views_delegate = NULL;
92
93 // static
94 const char View::kViewClassName[] = "views/View";
95
96 ////////////////////////////////////////////////////////////////////////////////
97 // View, public:
98
99 // TO BE MOVED -----------------------------------------------------------------
100
101 void View::SetHotTracked(bool flag) {
102 }
103
104 bool View::IsHotTracked() const {
105 return false;
106 }
107
108 // Creation and lifetime -------------------------------------------------------
109
110 View::View()
111 : parent_owned_(true),
112 id_(0),
113 group_(-1),
114 parent_(NULL),
115 visible_(true),
116 enabled_(true),
117 painting_enabled_(true),
118 registered_for_visible_bounds_notification_(false),
119 clip_x_(0.0),
120 clip_y_(0.0),
121 needs_layout_(true),
122 flip_canvas_on_paint_for_rtl_ui_(false),
123 paint_to_layer_(false),
124 accelerator_registration_delayed_(false),
125 accelerator_focus_manager_(NULL),
126 registered_accelerator_count_(0),
127 next_focusable_view_(NULL),
128 previous_focusable_view_(NULL),
129 focusable_(false),
130 accessibility_focusable_(false),
131 context_menu_controller_(NULL),
132 drag_controller_(NULL) {
133 }
134
135 View::~View() {
136 if (parent_)
137 parent_->RemoveChildView(this);
138
139 for (Views::const_iterator i(children_.begin()); i != children_.end(); ++i) {
140 (*i)->parent_ = NULL;
141 if ((*i)->parent_owned())
142 delete *i;
143 }
144
145 #if defined(OS_WIN)
146 if (native_view_accessibility_win_.get())
147 native_view_accessibility_win_->set_view(NULL);
148 #endif
149 }
150
151 // Tree operations -------------------------------------------------------------
152
153 const Widget* View::GetWidget() const {
154 // The root view holds a reference to this view hierarchy's Widget.
155 return parent_ ? parent_->GetWidget() : NULL;
156 }
157
158 Widget* View::GetWidget() {
159 return const_cast<Widget*>(const_cast<const View*>(this)->GetWidget());
160 }
161
162 void View::AddChildView(View* view) {
163 AddChildViewAt(view, child_count());
164 }
165
166 void View::AddChildViewAt(View* view, int index) {
167 CHECK_NE(view, this) << "You cannot add a view as its own child";
168
169 // If |view| has a parent, remove it from its parent.
170 View* parent = view->parent_;
171 if (parent)
172 parent->RemoveChildView(view);
173
174 // Sets the prev/next focus views.
175 InitFocusSiblings(view, index);
176
177 // Let's insert the view.
178 view->parent_ = this;
179 children_.insert(children_.begin() + index, view);
180
181 for (View* v = this; v; v = v->parent_)
182 v->ViewHierarchyChangedImpl(false, true, this, view);
183
184 view->PropagateAddNotifications(this, view);
185 UpdateTooltip();
186 if (GetWidget())
187 RegisterChildrenForVisibleBoundsNotification(view);
188
189 if (layout_manager_.get())
190 layout_manager_->ViewAdded(this, view);
191
192 if (use_acceleration_when_possible)
193 ReorderLayers();
194
195 // Make sure the visibility of the child layers are correct.
196 // If any of the parent View is hidden, then the layers of the subtree
197 // rooted at |this| should be hidden. Otherwise, all the child layers should
198 // inherit the visibility of the owner View.
199 UpdateLayerVisibility();
200 }
201
202 void View::ReorderChildView(View* view, int index) {
203 DCHECK_EQ(view->parent_, this);
204 if (index < 0)
205 index = child_count() - 1;
206 else if (index >= child_count())
207 return;
208 if (children_[index] == view)
209 return;
210
211 const Views::iterator i(std::find(children_.begin(), children_.end(), view));
212 DCHECK(i != children_.end());
213 children_.erase(i);
214
215 // Unlink the view first
216 View* next_focusable = view->next_focusable_view_;
217 View* prev_focusable = view->previous_focusable_view_;
218 if (prev_focusable)
219 prev_focusable->next_focusable_view_ = next_focusable;
220 if (next_focusable)
221 next_focusable->previous_focusable_view_ = prev_focusable;
222
223 // Add it in the specified index now.
224 InitFocusSiblings(view, index);
225 children_.insert(children_.begin() + index, view);
226
227 if (use_acceleration_when_possible)
228 ReorderLayers();
229 }
230
231 void View::RemoveChildView(View* view) {
232 DoRemoveChildView(view, true, true, false);
233 }
234
235 void View::RemoveAllChildViews(bool delete_children) {
236 while (!children_.empty())
237 DoRemoveChildView(children_.front(), false, false, delete_children);
238 UpdateTooltip();
239 }
240
241 bool View::Contains(const View* view) const {
242 for (const View* v = view; v; v = v->parent_) {
243 if (v == this)
244 return true;
245 }
246 return false;
247 }
248
249 int View::GetIndexOf(const View* view) const {
250 Views::const_iterator i(std::find(children_.begin(), children_.end(), view));
251 return i != children_.end() ? static_cast<int>(i - children_.begin()) : -1;
252 }
253
254 // Size and disposition --------------------------------------------------------
255
256 void View::SetBounds(int x, int y, int width, int height) {
257 SetBoundsRect(gfx::Rect(x, y, std::max(0, width), std::max(0, height)));
258 }
259
260 void View::SetBoundsRect(const gfx::Rect& bounds) {
261 if (bounds == bounds_) {
262 if (needs_layout_) {
263 needs_layout_ = false;
264 Layout();
265 SchedulePaint();
266 }
267 return;
268 }
269
270 if (IsVisible()) {
271 // Paint where the view is currently.
272 SchedulePaintBoundsChanged(
273 bounds_.size() == bounds.size() ? SCHEDULE_PAINT_SIZE_SAME :
274 SCHEDULE_PAINT_SIZE_CHANGED);
275 }
276
277 gfx::Rect prev = bounds_;
278 bounds_ = bounds;
279 BoundsChanged(prev);
280 }
281
282 void View::SetSize(const gfx::Size& size) {
283 SetBounds(x(), y(), size.width(), size.height());
284 }
285
286 void View::SetPosition(const gfx::Point& position) {
287 SetBounds(position.x(), position.y(), width(), height());
288 }
289
290 void View::SetX(int x) {
291 SetBounds(x, y(), width(), height());
292 }
293
294 void View::SetY(int y) {
295 SetBounds(x(), y, width(), height());
296 }
297
298 gfx::Rect View::GetContentsBounds() const {
299 gfx::Rect contents_bounds(GetLocalBounds());
300 if (border_.get()) {
301 gfx::Insets insets;
302 border_->GetInsets(&insets);
303 contents_bounds.Inset(insets);
304 }
305 return contents_bounds;
306 }
307
308 gfx::Rect View::GetLocalBounds() const {
309 return gfx::Rect(gfx::Point(), size());
310 }
311
312 gfx::Insets View::GetInsets() const {
313 gfx::Insets insets;
314 if (border_.get())
315 border_->GetInsets(&insets);
316 return insets;
317 }
318
319 gfx::Rect View::GetVisibleBounds() const {
320 if (!IsVisibleInRootView())
321 return gfx::Rect();
322 gfx::Rect vis_bounds(0, 0, width(), height());
323 gfx::Rect ancestor_bounds;
324 const View* view = this;
325 ui::Transform transform;
326
327 while (view != NULL && !vis_bounds.IsEmpty()) {
328 transform.ConcatTransform(view->GetTransform());
329 transform.ConcatTranslate(static_cast<float>(view->GetMirroredX()),
330 static_cast<float>(view->y()));
331
332 vis_bounds = view->ConvertRectToParent(vis_bounds);
333 const View* ancestor = view->parent_;
334 if (ancestor != NULL) {
335 ancestor_bounds.SetRect(0, 0, ancestor->width(), ancestor->height());
336 vis_bounds = vis_bounds.Intersect(ancestor_bounds);
337 } else if (!view->GetWidget()) {
338 // If the view has no Widget, we're not visible. Return an empty rect.
339 return gfx::Rect();
340 }
341 view = ancestor;
342 }
343 if (vis_bounds.IsEmpty())
344 return vis_bounds;
345 // Convert back to this views coordinate system.
346 transform.TransformRectReverse(&vis_bounds);
347 return vis_bounds;
348 }
349
350 gfx::Rect View::GetScreenBounds() const {
351 gfx::Point origin;
352 View::ConvertPointToScreen(this, &origin);
353 return gfx::Rect(origin, size());
354 }
355
356 gfx::Size View::GetPreferredSize() {
357 if (layout_manager_.get())
358 return layout_manager_->GetPreferredSize(this);
359 return gfx::Size();
360 }
361
362 int View::GetBaseline() const {
363 return -1;
364 }
365
366 void View::SizeToPreferredSize() {
367 gfx::Size prefsize = GetPreferredSize();
368 if ((prefsize.width() != width()) || (prefsize.height() != height()))
369 SetBounds(x(), y(), prefsize.width(), prefsize.height());
370 }
371
372 gfx::Size View::GetMinimumSize() {
373 return GetPreferredSize();
374 }
375
376 int View::GetHeightForWidth(int w) {
377 if (layout_manager_.get())
378 return layout_manager_->GetPreferredHeightForWidth(this, w);
379 return GetPreferredSize().height();
380 }
381
382 void View::SetVisible(bool visible) {
383 if (visible != visible_) {
384 // If the View is currently visible, schedule paint to refresh parent.
385 // TODO(beng): not sure we should be doing this if we have a layer.
386 if (visible_)
387 SchedulePaint();
388
389 visible_ = visible;
390
391 // This notifies all sub-views recursively.
392 PropagateVisibilityNotifications(this, visible_);
393 UpdateLayerVisibility();
394
395 // If we are newly visible, schedule paint.
396 if (visible_)
397 SchedulePaint();
398 }
399 }
400
401 bool View::IsVisible() const {
402 return visible_;
403 }
404
405 bool View::IsVisibleInRootView() const {
406 return IsVisible() && parent_ ? parent_->IsVisibleInRootView() : false;
407 }
408
409 void View::SetEnabled(bool enabled) {
410 if (enabled != enabled_) {
411 enabled_ = enabled;
412 OnEnabledChanged();
413 }
414 }
415
416 bool View::IsEnabled() const {
417 return enabled_;
418 }
419
420 void View::OnEnabledChanged() {
421 SchedulePaint();
422 }
423
424 // Transformations -------------------------------------------------------------
425
426 const ui::Transform& View::GetTransform() const {
427 static const ui::Transform* no_op = new ui::Transform;
428 return layer() ? layer()->transform() : *no_op;
429 }
430
431 void View::SetTransform(const ui::Transform& transform) {
432 if (!transform.HasChange()) {
433 if (layer()) {
434 layer()->SetTransform(transform);
435 if (!paint_to_layer_)
436 DestroyLayer();
437 } else {
438 // Nothing.
439 }
440 } else {
441 if (!layer())
442 CreateLayer();
443 layer()->SetTransform(transform);
444 layer()->ScheduleDraw();
445 }
446 }
447
448 void View::SetPaintToLayer(bool paint_to_layer) {
449 paint_to_layer_ = paint_to_layer;
450 if (paint_to_layer_ && !layer()) {
451 CreateLayer();
452 } else if (!paint_to_layer_ && layer()) {
453 DestroyLayer();
454 }
455 }
456
457 // RTL positioning -------------------------------------------------------------
458
459 gfx::Rect View::GetMirroredBounds() const {
460 gfx::Rect bounds(bounds_);
461 bounds.set_x(GetMirroredX());
462 return bounds;
463 }
464
465 gfx::Point View::GetMirroredPosition() const {
466 return gfx::Point(GetMirroredX(), y());
467 }
468
469 int View::GetMirroredX() const {
470 return parent_ ? parent_->GetMirroredXForRect(bounds_) : x();
471 }
472
473 int View::GetMirroredXForRect(const gfx::Rect& bounds) const {
474 return base::i18n::IsRTL() ?
475 (width() - bounds.x() - bounds.width()) : bounds.x();
476 }
477
478 int View::GetMirroredXInView(int x) const {
479 return base::i18n::IsRTL() ? width() - x : x;
480 }
481
482 int View::GetMirroredXWithWidthInView(int x, int w) const {
483 return base::i18n::IsRTL() ? width() - x - w : x;
484 }
485
486 // Layout ----------------------------------------------------------------------
487
488 void View::Layout() {
489 needs_layout_ = false;
490
491 // If we have a layout manager, let it handle the layout for us.
492 if (layout_manager_.get())
493 layout_manager_->Layout(this);
494
495 // Make sure to propagate the Layout() call to any children that haven't
496 // received it yet through the layout manager and need to be laid out. This
497 // is needed for the case when the child requires a layout but its bounds
498 // weren't changed by the layout manager. If there is no layout manager, we
499 // just propagate the Layout() call down the hierarchy, so whoever receives
500 // the call can take appropriate action.
501 for (int i = 0, count = child_count(); i < count; ++i) {
502 View* child = child_at(i);
503 if (child->needs_layout_ || !layout_manager_.get()) {
504 child->needs_layout_ = false;
505 child->Layout();
506 }
507 }
508 }
509
510 void View::InvalidateLayout() {
511 // Always invalidate up. This is needed to handle the case of us already being
512 // valid, but not our parent.
513 needs_layout_ = true;
514 if (parent_)
515 parent_->InvalidateLayout();
516 }
517
518 LayoutManager* View::GetLayoutManager() const {
519 return layout_manager_.get();
520 }
521
522 void View::SetLayoutManager(LayoutManager* layout_manager) {
523 if (layout_manager_.get())
524 layout_manager_->Uninstalled(this);
525
526 layout_manager_.reset(layout_manager);
527 if (layout_manager_.get())
528 layout_manager_->Installed(this);
529 }
530
531 // Attributes ------------------------------------------------------------------
532
533 std::string View::GetClassName() const {
534 return kViewClassName;
535 }
536
537 View* View::GetAncestorWithClassName(const std::string& name) {
538 for (View* view = this; view; view = view->parent_) {
539 if (view->GetClassName() == name)
540 return view;
541 }
542 return NULL;
543 }
544
545 const View* View::GetViewByID(int id) const {
546 if (id == id_)
547 return const_cast<View*>(this);
548
549 for (int i = 0, count = child_count(); i < count; ++i) {
550 const View* view = child_at(i)->GetViewByID(id);
551 if (view)
552 return view;
553 }
554 return NULL;
555 }
556
557 View* View::GetViewByID(int id) {
558 return const_cast<View*>(const_cast<const View*>(this)->GetViewByID(id));
559 }
560
561 void View::SetGroup(int gid) {
562 // Don't change the group id once it's set.
563 DCHECK(group_ == -1 || group_ == gid);
564 group_ = gid;
565 }
566
567 int View::GetGroup() const {
568 return group_;
569 }
570
571 bool View::IsGroupFocusTraversable() const {
572 return true;
573 }
574
575 void View::GetViewsInGroup(int group, Views* views) {
576 if (group_ == group)
577 views->push_back(this);
578
579 for (int i = 0, count = child_count(); i < count; ++i)
580 child_at(i)->GetViewsInGroup(group, views);
581 }
582
583 View* View::GetSelectedViewForGroup(int group) {
584 Views views;
585 GetWidget()->GetRootView()->GetViewsInGroup(group, &views);
586 return views.empty() ? NULL : views[0];
587 }
588
589 // Coordinate conversion -------------------------------------------------------
590
591 // static
592 void View::ConvertPointToView(const View* source,
593 const View* target,
594 gfx::Point* point) {
595 if (source == target)
596 return;
597
598 // |source| can be NULL.
599 const View* root = GetHierarchyRoot(target);
600 if (source) {
601 CHECK_EQ(GetHierarchyRoot(source), root);
602
603 if (source != root)
604 source->ConvertPointForAncestor(root, point);
605 }
606
607 if (target != root)
608 target->ConvertPointFromAncestor(root, point);
609
610 // API defines NULL |source| as returning the point in screen coordinates.
611 if (!source) {
612 *point = point->Subtract(
613 root->GetWidget()->GetClientAreaScreenBounds().origin());
614 }
615 }
616
617 // static
618 void View::ConvertPointToWidget(const View* src, gfx::Point* p) {
619 DCHECK(src);
620 DCHECK(p);
621
622 src->ConvertPointForAncestor(NULL, p);
623 }
624
625 // static
626 void View::ConvertPointFromWidget(const View* dest, gfx::Point* p) {
627 DCHECK(dest);
628 DCHECK(p);
629
630 dest->ConvertPointFromAncestor(NULL, p);
631 }
632
633 // static
634 void View::ConvertPointToScreen(const View* src, gfx::Point* p) {
635 DCHECK(src);
636 DCHECK(p);
637
638 // If the view is not connected to a tree, there's nothing we can do.
639 const Widget* widget = src->GetWidget();
640 if (widget) {
641 ConvertPointToWidget(src, p);
642 gfx::Rect r = widget->GetClientAreaScreenBounds();
643 p->SetPoint(p->x() + r.x(), p->y() + r.y());
644 }
645 }
646
647 gfx::Rect View::ConvertRectToParent(const gfx::Rect& rect) const {
648 gfx::Rect x_rect = rect;
649 GetTransform().TransformRect(&x_rect);
650 x_rect.Offset(GetMirroredPosition());
651 return x_rect;
652 }
653
654 gfx::Rect View::ConvertRectToWidget(const gfx::Rect& rect) const {
655 gfx::Rect x_rect = rect;
656 for (const View* v = this; v; v = v->parent_)
657 x_rect = v->ConvertRectToParent(x_rect);
658 return x_rect;
659 }
660
661 // Painting --------------------------------------------------------------------
662
663 void View::SchedulePaint() {
664 SchedulePaintInRect(GetLocalBounds());
665 }
666
667 void View::SchedulePaintInRect(const gfx::Rect& rect) {
668 if (!IsVisible() || !painting_enabled_)
669 return;
670
671 if (layer()) {
672 layer()->SchedulePaint(rect);
673 } else if (parent_) {
674 // Translate the requested paint rect to the parent's coordinate system
675 // then pass this notification up to the parent.
676 parent_->SchedulePaintInRect(ConvertRectToParent(rect));
677 }
678 }
679
680 void View::Paint(gfx::Canvas* canvas) {
681 TRACE_EVENT0("views", "View::Paint");
682
683 ScopedCanvas scoped_canvas(canvas);
684
685 // Paint this View and its children, setting the clip rect to the bounds
686 // of this View and translating the origin to the local bounds' top left
687 // point.
688 //
689 // Note that the X (or left) position we pass to ClipRectInt takes into
690 // consideration whether or not the view uses a right-to-left layout so that
691 // we paint our view in its mirrored position if need be.
692 if (!canvas->ClipRect(gfx::Rect(GetMirroredX(), y(),
693 width() - static_cast<int>(clip_x_),
694 height() - static_cast<int>(clip_y_)))) {
695 return;
696 }
697 // Non-empty clip, translate the graphics such that 0,0 corresponds to
698 // where this view is located (related to its parent).
699 canvas->Translate(GetMirroredPosition());
700 canvas->Transform(GetTransform());
701
702 PaintCommon(canvas);
703 }
704
705 ThemeProvider* View::GetThemeProvider() const {
706 const Widget* widget = GetWidget();
707 return widget ? widget->GetThemeProvider() : NULL;
708 }
709
710 // Accelerated Painting --------------------------------------------------------
711
712 // static
713 void View::set_use_acceleration_when_possible(bool use) {
714 use_acceleration_when_possible = use;
715 }
716
717 // static
718 bool View::get_use_acceleration_when_possible() {
719 return use_acceleration_when_possible;
720 }
721
722 // Input -----------------------------------------------------------------------
723
724 View* View::GetEventHandlerForPoint(const gfx::Point& point) {
725 // Walk the child Views recursively looking for the View that most
726 // tightly encloses the specified point.
727 for (int i = child_count() - 1; i >= 0; --i) {
728 View* child = child_at(i);
729 if (!child->IsVisible())
730 continue;
731
732 gfx::Point point_in_child_coords(point);
733 View::ConvertPointToView(this, child, &point_in_child_coords);
734 if (child->HitTest(point_in_child_coords))
735 return child->GetEventHandlerForPoint(point_in_child_coords);
736 }
737 return this;
738 }
739
740 gfx::NativeCursor View::GetCursor(const MouseEvent& event) {
741 #if defined(OS_WIN) && !defined(USE_AURA)
742 static HCURSOR arrow = LoadCursor(NULL, IDC_ARROW);
743 return arrow;
744 #else
745 return gfx::kNullCursor;
746 #endif
747 }
748
749 bool View::HitTest(const gfx::Point& l) const {
750 if (GetLocalBounds().Contains(l)) {
751 if (HasHitTestMask()) {
752 gfx::Path mask;
753 GetHitTestMask(&mask);
754 #if defined(USE_AURA)
755 // TODO: should we use this every where?
756 SkRegion clip_region;
757 clip_region.setRect(0, 0, width(), height());
758 SkRegion mask_region;
759 return mask_region.setPath(mask, clip_region) &&
760 mask_region.contains(l.x(), l.y());
761 #elif defined(OS_WIN)
762 base::win::ScopedRegion rgn(mask.CreateNativeRegion());
763 return !!PtInRegion(rgn, l.x(), l.y());
764 #elif defined(TOOLKIT_USES_GTK)
765 ui::ScopedRegion rgn(mask.CreateNativeRegion());
766 return gdk_region_point_in(rgn.Get(), l.x(), l.y());
767 #endif
768 }
769 // No mask, but inside our bounds.
770 return true;
771 }
772 // Outside our bounds.
773 return false;
774 }
775
776 bool View::OnMousePressed(const MouseEvent& event) {
777 return false;
778 }
779
780 bool View::OnMouseDragged(const MouseEvent& event) {
781 return false;
782 }
783
784 void View::OnMouseReleased(const MouseEvent& event) {
785 }
786
787 void View::OnMouseCaptureLost() {
788 }
789
790 void View::OnMouseMoved(const MouseEvent& event) {
791 }
792
793 void View::OnMouseEntered(const MouseEvent& event) {
794 }
795
796 void View::OnMouseExited(const MouseEvent& event) {
797 }
798
799 ui::TouchStatus View::OnTouchEvent(const TouchEvent& event) {
800 DVLOG(1) << "visited the OnTouchEvent";
801 return ui::TOUCH_STATUS_UNKNOWN;
802 }
803
804 void View::SetMouseHandler(View *new_mouse_handler) {
805 // It is valid for new_mouse_handler to be NULL
806 if (parent_)
807 parent_->SetMouseHandler(new_mouse_handler);
808 }
809
810 bool View::OnKeyPressed(const KeyEvent& event) {
811 return false;
812 }
813
814 bool View::OnKeyReleased(const KeyEvent& event) {
815 return false;
816 }
817
818 bool View::OnMouseWheel(const MouseWheelEvent& event) {
819 return false;
820 }
821
822 ui::TextInputClient* View::GetTextInputClient() {
823 return NULL;
824 }
825
826 InputMethod* View::GetInputMethod() {
827 Widget* widget = GetWidget();
828 return widget ? widget->GetInputMethod() : NULL;
829 }
830
831 // Accelerators ----------------------------------------------------------------
832
833 void View::AddAccelerator(const ui::Accelerator& accelerator) {
834 if (!accelerators_.get())
835 accelerators_.reset(new std::vector<ui::Accelerator>());
836
837 DCHECK(std::find(accelerators_->begin(), accelerators_->end(), accelerator) ==
838 accelerators_->end())
839 << "Registering the same accelerator multiple times";
840
841 accelerators_->push_back(accelerator);
842 RegisterPendingAccelerators();
843 }
844
845 void View::RemoveAccelerator(const ui::Accelerator& accelerator) {
846 if (!accelerators_.get()) {
847 NOTREACHED() << "Removing non-existing accelerator";
848 return;
849 }
850
851 std::vector<ui::Accelerator>::iterator i(
852 std::find(accelerators_->begin(), accelerators_->end(), accelerator));
853 if (i == accelerators_->end()) {
854 NOTREACHED() << "Removing non-existing accelerator";
855 return;
856 }
857
858 size_t index = i - accelerators_->begin();
859 accelerators_->erase(i);
860 if (index >= registered_accelerator_count_) {
861 // The accelerator is not registered to FocusManager.
862 return;
863 }
864 --registered_accelerator_count_;
865
866 // Providing we are attached to a Widget and registered with a focus manager,
867 // we should de-register from that focus manager now.
868 if (GetWidget() && accelerator_focus_manager_)
869 accelerator_focus_manager_->UnregisterAccelerator(accelerator, this);
870 }
871
872 void View::ResetAccelerators() {
873 if (accelerators_.get())
874 UnregisterAccelerators(false);
875 }
876
877 bool View::AcceleratorPressed(const ui::Accelerator& accelerator) {
878 return false;
879 }
880
881 // Focus -----------------------------------------------------------------------
882
883 bool View::HasFocus() const {
884 const FocusManager* focus_manager = GetFocusManager();
885 return focus_manager && (focus_manager->GetFocusedView() == this);
886 }
887
888 View* View::GetNextFocusableView() {
889 return next_focusable_view_;
890 }
891
892 const View* View::GetNextFocusableView() const {
893 return next_focusable_view_;
894 }
895
896 View* View::GetPreviousFocusableView() {
897 return previous_focusable_view_;
898 }
899
900 void View::SetNextFocusableView(View* view) {
901 view->previous_focusable_view_ = this;
902 next_focusable_view_ = view;
903 }
904
905 bool View::IsFocusableInRootView() const {
906 return IsFocusable() && IsVisibleInRootView();
907 }
908
909 bool View::IsAccessibilityFocusableInRootView() const {
910 return (focusable_ || accessibility_focusable_) && IsEnabled() &&
911 IsVisibleInRootView();
912 }
913
914 FocusManager* View::GetFocusManager() {
915 Widget* widget = GetWidget();
916 return widget ? widget->GetFocusManager() : NULL;
917 }
918
919 const FocusManager* View::GetFocusManager() const {
920 const Widget* widget = GetWidget();
921 return widget ? widget->GetFocusManager() : NULL;
922 }
923
924 void View::RequestFocus() {
925 FocusManager* focus_manager = GetFocusManager();
926 if (focus_manager && IsFocusableInRootView())
927 focus_manager->SetFocusedView(this);
928 }
929
930 bool View::SkipDefaultKeyEventProcessing(const KeyEvent& event) {
931 return false;
932 }
933
934 FocusTraversable* View::GetFocusTraversable() {
935 return NULL;
936 }
937
938 FocusTraversable* View::GetPaneFocusTraversable() {
939 return NULL;
940 }
941
942 // Tooltips --------------------------------------------------------------------
943
944 bool View::GetTooltipText(const gfx::Point& p, string16* tooltip) const {
945 return false;
946 }
947
948 bool View::GetTooltipTextOrigin(const gfx::Point& p, gfx::Point* loc) const {
949 return false;
950 }
951
952 // Context menus ---------------------------------------------------------------
953
954 void View::ShowContextMenu(const gfx::Point& p, bool is_mouse_gesture) {
955 if (!context_menu_controller_)
956 return;
957
958 context_menu_controller_->ShowContextMenuForView(this, p, is_mouse_gesture);
959 }
960
961 // Drag and drop ---------------------------------------------------------------
962
963 bool View::GetDropFormats(
964 int* formats,
965 std::set<OSExchangeData::CustomFormat>* custom_formats) {
966 return false;
967 }
968
969 bool View::AreDropTypesRequired() {
970 return false;
971 }
972
973 bool View::CanDrop(const OSExchangeData& data) {
974 // TODO(sky): when I finish up migration, this should default to true.
975 return false;
976 }
977
978 void View::OnDragEntered(const DropTargetEvent& event) {
979 }
980
981 int View::OnDragUpdated(const DropTargetEvent& event) {
982 return ui::DragDropTypes::DRAG_NONE;
983 }
984
985 void View::OnDragExited() {
986 }
987
988 int View::OnPerformDrop(const DropTargetEvent& event) {
989 return ui::DragDropTypes::DRAG_NONE;
990 }
991
992 void View::OnDragDone() {
993 }
994
995 // static
996 bool View::ExceededDragThreshold(int delta_x, int delta_y) {
997 return (abs(delta_x) > GetHorizontalDragThreshold() ||
998 abs(delta_y) > GetVerticalDragThreshold());
999 }
1000
1001 // Scrolling -------------------------------------------------------------------
1002
1003 void View::ScrollRectToVisible(const gfx::Rect& rect) {
1004 // We must take RTL UI mirroring into account when adjusting the position of
1005 // the region.
1006 if (parent_) {
1007 gfx::Rect scroll_rect(rect);
1008 scroll_rect.Offset(GetMirroredX(), y());
1009 parent_->ScrollRectToVisible(scroll_rect);
1010 }
1011 }
1012
1013 int View::GetPageScrollIncrement(ScrollView* scroll_view,
1014 bool is_horizontal, bool is_positive) {
1015 return 0;
1016 }
1017
1018 int View::GetLineScrollIncrement(ScrollView* scroll_view,
1019 bool is_horizontal, bool is_positive) {
1020 return 0;
1021 }
1022
1023 ////////////////////////////////////////////////////////////////////////////////
1024 // View, protected:
1025
1026 // Size and disposition --------------------------------------------------------
1027
1028 void View::OnBoundsChanged(const gfx::Rect& previous_bounds) {
1029 }
1030
1031 void View::PreferredSizeChanged() {
1032 InvalidateLayout();
1033 if (parent_)
1034 parent_->ChildPreferredSizeChanged(this);
1035 }
1036
1037 bool View::NeedsNotificationWhenVisibleBoundsChange() const {
1038 return false;
1039 }
1040
1041 void View::OnVisibleBoundsChanged() {
1042 }
1043
1044 // Tree operations -------------------------------------------------------------
1045
1046 void View::ViewHierarchyChanged(bool is_add, View* parent, View* child) {
1047 }
1048
1049 void View::VisibilityChanged(View* starting_from, bool is_visible) {
1050 }
1051
1052 void View::NativeViewHierarchyChanged(bool attached,
1053 gfx::NativeView native_view,
1054 internal::RootView* root_view) {
1055 FocusManager* focus_manager = GetFocusManager();
1056 if (!accelerator_registration_delayed_ &&
1057 accelerator_focus_manager_ &&
1058 accelerator_focus_manager_ != focus_manager) {
1059 UnregisterAccelerators(true);
1060 accelerator_registration_delayed_ = true;
1061 }
1062 if (accelerator_registration_delayed_ && attached) {
1063 if (focus_manager) {
1064 RegisterPendingAccelerators();
1065 accelerator_registration_delayed_ = false;
1066 }
1067 }
1068 }
1069
1070 // Painting --------------------------------------------------------------------
1071
1072 void View::PaintChildren(gfx::Canvas* canvas) {
1073 TRACE_EVENT0("views", "View::PaintChildren");
1074 for (int i = 0, count = child_count(); i < count; ++i)
1075 if (!child_at(i)->layer())
1076 child_at(i)->Paint(canvas);
1077 }
1078
1079 void View::OnPaint(gfx::Canvas* canvas) {
1080 TRACE_EVENT0("views", "View::OnPaint");
1081 OnPaintBackground(canvas);
1082 OnPaintFocusBorder(canvas);
1083 OnPaintBorder(canvas);
1084 }
1085
1086 void View::OnPaintBackground(gfx::Canvas* canvas) {
1087 if (background_.get()) {
1088 TRACE_EVENT2("views", "View::OnPaintBackground",
1089 "width", canvas->GetSkCanvas()->getDevice()->width(),
1090 "height", canvas->GetSkCanvas()->getDevice()->height());
1091 background_->Paint(canvas, this);
1092 }
1093 }
1094
1095 void View::OnPaintBorder(gfx::Canvas* canvas) {
1096 if (border_.get()) {
1097 TRACE_EVENT2("views", "View::OnPaintBorder",
1098 "width", canvas->GetSkCanvas()->getDevice()->width(),
1099 "height", canvas->GetSkCanvas()->getDevice()->height());
1100 border_->Paint(*this, canvas);
1101 }
1102 }
1103
1104 void View::OnPaintFocusBorder(gfx::Canvas* canvas) {
1105 if ((IsFocusable() || IsAccessibilityFocusableInRootView()) && HasFocus()) {
1106 TRACE_EVENT2("views", "views::OnPaintFocusBorder",
1107 "width", canvas->GetSkCanvas()->getDevice()->width(),
1108 "height", canvas->GetSkCanvas()->getDevice()->height());
1109 canvas->DrawFocusRect(GetLocalBounds());
1110 }
1111 }
1112
1113 // Accelerated Painting --------------------------------------------------------
1114
1115 void View::SetFillsBoundsOpaquely(bool fills_bounds_opaquely) {
1116 // This method should not have the side-effect of creating the layer.
1117 if (layer())
1118 layer()->SetFillsBoundsOpaquely(fills_bounds_opaquely);
1119 }
1120
1121 bool View::SetExternalTexture(ui::Texture* texture) {
1122 DCHECK(texture);
1123 SetPaintToLayer(true);
1124
1125 layer()->SetExternalTexture(texture);
1126
1127 // Child views must not paint into the external texture. So make sure each
1128 // child view has its own layer to paint into.
1129 for (Views::iterator i = children_.begin(); i != children_.end(); ++i)
1130 (*i)->SetPaintToLayer(true);
1131
1132 SchedulePaintInRect(GetLocalBounds());
1133 return true;
1134 }
1135
1136 void View::CalculateOffsetToAncestorWithLayer(gfx::Point* offset,
1137 ui::Layer** layer_parent) {
1138 if (layer()) {
1139 if (layer_parent)
1140 *layer_parent = layer();
1141 return;
1142 }
1143 if (!parent_)
1144 return;
1145
1146 offset->Offset(x(), y());
1147 parent_->CalculateOffsetToAncestorWithLayer(offset, layer_parent);
1148 }
1149
1150 void View::MoveLayerToParent(ui::Layer* parent_layer,
1151 const gfx::Point& point) {
1152 gfx::Point local_point(point);
1153 if (parent_layer != layer())
1154 local_point.Offset(x(), y());
1155 if (layer() && parent_layer != layer()) {
1156 parent_layer->Add(layer());
1157 layer()->SetBounds(gfx::Rect(local_point.x(), local_point.y(),
1158 width(), height()));
1159 } else {
1160 for (int i = 0, count = child_count(); i < count; ++i)
1161 child_at(i)->MoveLayerToParent(parent_layer, local_point);
1162 }
1163 }
1164
1165 void View::UpdateLayerVisibility() {
1166 if (!use_acceleration_when_possible)
1167 return;
1168 bool visible = IsVisible();
1169 for (const View* v = parent_; visible && v && !v->layer(); v = v->parent_)
1170 visible = v->IsVisible();
1171
1172 UpdateChildLayerVisibility(visible);
1173 }
1174
1175 void View::UpdateChildLayerVisibility(bool ancestor_visible) {
1176 if (layer()) {
1177 layer()->SetVisible(ancestor_visible && IsVisible());
1178 } else {
1179 for (int i = 0, count = child_count(); i < count; ++i)
1180 child_at(i)->UpdateChildLayerVisibility(ancestor_visible && IsVisible());
1181 }
1182 }
1183
1184 void View::UpdateChildLayerBounds(const gfx::Point& offset) {
1185 if (layer()) {
1186 layer()->SetBounds(gfx::Rect(offset.x(), offset.y(), width(), height()));
1187 } else {
1188 for (int i = 0, count = child_count(); i < count; ++i) {
1189 gfx::Point new_offset(offset.x() + child_at(i)->x(),
1190 offset.y() + child_at(i)->y());
1191 child_at(i)->UpdateChildLayerBounds(new_offset);
1192 }
1193 }
1194 }
1195
1196 void View::OnPaintLayer(gfx::Canvas* canvas) {
1197 if (!layer() || !layer()->fills_bounds_opaquely())
1198 canvas->GetSkCanvas()->drawColor(SK_ColorBLACK, SkXfermode::kClear_Mode);
1199 PaintCommon(canvas);
1200 }
1201
1202 void View::ReorderLayers() {
1203 View* v = this;
1204 while (v && !v->layer())
1205 v = v->parent();
1206
1207 // Forward to widget in case we're in a NativeWidgetView.
1208 if (!v) {
1209 if (GetWidget())
1210 GetWidget()->ReorderLayers();
1211 } else {
1212 for (Views::const_iterator i(v->children_.begin());
1213 i != v->children_.end();
1214 ++i)
1215 (*i)->ReorderChildLayers(v->layer());
1216 }
1217 }
1218
1219 void View::ReorderChildLayers(ui::Layer* parent_layer) {
1220 if (layer()) {
1221 DCHECK_EQ(parent_layer, layer()->parent());
1222 parent_layer->StackAtTop(layer());
1223 } else {
1224 for (Views::const_iterator i(children_.begin()); i != children_.end(); ++i)
1225 (*i)->ReorderChildLayers(parent_layer);
1226 }
1227 }
1228
1229 // Input -----------------------------------------------------------------------
1230
1231 bool View::HasHitTestMask() const {
1232 return false;
1233 }
1234
1235 void View::GetHitTestMask(gfx::Path* mask) const {
1236 DCHECK(mask);
1237 }
1238
1239 // Focus -----------------------------------------------------------------------
1240
1241 bool View::IsFocusable() const {
1242 return focusable_ && IsEnabled() && IsVisible();
1243 }
1244
1245 void View::OnFocus() {
1246 // TODO(beng): Investigate whether it's possible for us to move this to
1247 // Focus().
1248 // By default, we clear the native focus. This ensures that no visible native
1249 // view as the focus and that we still receive keyboard inputs.
1250 FocusManager* focus_manager = GetFocusManager();
1251 if (focus_manager)
1252 focus_manager->ClearNativeFocus();
1253
1254 // TODO(beng): Investigate whether it's possible for us to move this to
1255 // Focus().
1256 // Notify assistive technologies of the focus change.
1257 GetWidget()->NotifyAccessibilityEvent(
1258 this, ui::AccessibilityTypes::EVENT_FOCUS, true);
1259 }
1260
1261 void View::OnBlur() {
1262 }
1263
1264 void View::Focus() {
1265 SchedulePaint();
1266 OnFocus();
1267 }
1268
1269 void View::Blur() {
1270 SchedulePaint();
1271 OnBlur();
1272 }
1273
1274 // Tooltips --------------------------------------------------------------------
1275
1276 void View::TooltipTextChanged() {
1277 Widget* widget = GetWidget();
1278 // TooltipManager may be null if there is a problem creating it.
1279 if (widget && widget->native_widget_private()->GetTooltipManager()) {
1280 widget->native_widget_private()->GetTooltipManager()->
1281 TooltipTextChanged(this);
1282 }
1283 }
1284
1285 // Context menus ---------------------------------------------------------------
1286
1287 gfx::Point View::GetKeyboardContextMenuLocation() {
1288 gfx::Rect vis_bounds = GetVisibleBounds();
1289 gfx::Point screen_point(vis_bounds.x() + vis_bounds.width() / 2,
1290 vis_bounds.y() + vis_bounds.height() / 2);
1291 ConvertPointToScreen(this, &screen_point);
1292 return screen_point;
1293 }
1294
1295 // Drag and drop ---------------------------------------------------------------
1296
1297 int View::GetDragOperations(const gfx::Point& press_pt) {
1298 return drag_controller_ ?
1299 drag_controller_->GetDragOperationsForView(this, press_pt) :
1300 ui::DragDropTypes::DRAG_NONE;
1301 }
1302
1303 void View::WriteDragData(const gfx::Point& press_pt, OSExchangeData* data) {
1304 DCHECK(drag_controller_);
1305 drag_controller_->WriteDragDataForView(this, press_pt, data);
1306 }
1307
1308 bool View::InDrag() {
1309 Widget* widget = GetWidget();
1310 return widget ? widget->dragged_view() == this : false;
1311 }
1312
1313 // Debugging -------------------------------------------------------------------
1314
1315 #if !defined(NDEBUG)
1316
1317 std::string View::PrintViewGraph(bool first) {
1318 return DoPrintViewGraph(first, this);
1319 }
1320
1321 std::string View::DoPrintViewGraph(bool first, View* view_with_children) {
1322 // 64-bit pointer = 16 bytes of hex + "0x" + '\0' = 19.
1323 const size_t kMaxPointerStringLength = 19;
1324
1325 std::string result;
1326
1327 if (first)
1328 result.append("digraph {\n");
1329
1330 // Node characteristics.
1331 char p[kMaxPointerStringLength];
1332
1333 size_t baseNameIndex = GetClassName().find_last_of('/');
1334 if (baseNameIndex == std::string::npos)
1335 baseNameIndex = 0;
1336 else
1337 baseNameIndex++;
1338
1339 char bounds_buffer[512];
1340
1341 // Information about current node.
1342 base::snprintf(p, arraysize(bounds_buffer), "%p", view_with_children);
1343 result.append(" N");
1344 result.append(p+2);
1345 result.append(" [label=\"");
1346
1347 result.append(GetClassName().substr(baseNameIndex).c_str());
1348
1349 base::snprintf(bounds_buffer,
1350 arraysize(bounds_buffer),
1351 "\\n bounds: (%d, %d), (%dx%d)",
1352 this->bounds().x(),
1353 this->bounds().y(),
1354 this->bounds().width(),
1355 this->bounds().height());
1356 result.append(bounds_buffer);
1357
1358 if (layer() && !layer()->hole_rect().IsEmpty()) {
1359 base::snprintf(bounds_buffer,
1360 arraysize(bounds_buffer),
1361 "\\n hole bounds: (%d, %d), (%dx%d)",
1362 layer()->hole_rect().x(),
1363 layer()->hole_rect().y(),
1364 layer()->hole_rect().width(),
1365 layer()->hole_rect().height());
1366 result.append(bounds_buffer);
1367 }
1368
1369 if (GetTransform().HasChange()) {
1370 gfx::Point translation;
1371 float rotation;
1372 gfx::Point3f scale;
1373 if (ui::InterpolatedTransform::FactorTRS(GetTransform(),
1374 &translation,
1375 &rotation,
1376 &scale)) {
1377 if (translation != gfx::Point(0, 0)) {
1378 base::snprintf(bounds_buffer,
1379 arraysize(bounds_buffer),
1380 "\\n translation: (%d, %d)",
1381 translation.x(),
1382 translation.y());
1383 result.append(bounds_buffer);
1384 }
1385
1386 if (fabs(rotation) > 1e-5) {
1387 base::snprintf(bounds_buffer,
1388 arraysize(bounds_buffer),
1389 "\\n rotation: %3.2f", rotation);
1390 result.append(bounds_buffer);
1391 }
1392
1393 if (scale.AsPoint() != gfx::Point(0, 0)) {
1394 base::snprintf(bounds_buffer,
1395 arraysize(bounds_buffer),
1396 "\\n scale: (%2.4f, %2.4f)",
1397 scale.x(),
1398 scale.y());
1399 result.append(bounds_buffer);
1400 }
1401 }
1402 }
1403
1404 result.append("\"");
1405 if (!parent_)
1406 result.append(", shape=box");
1407 if (layer()) {
1408 if (layer()->texture())
1409 result.append(", color=green");
1410 else
1411 result.append(", color=red");
1412
1413 if (layer()->fills_bounds_opaquely())
1414 result.append(", style=filled");
1415 }
1416 result.append("]\n");
1417
1418 // Link to parent.
1419 if (parent_) {
1420 char pp[kMaxPointerStringLength];
1421
1422 base::snprintf(pp, kMaxPointerStringLength, "%p", parent_);
1423 result.append(" N");
1424 result.append(pp+2);
1425 result.append(" -> N");
1426 result.append(p+2);
1427 result.append("\n");
1428 }
1429
1430 // Children.
1431 for (int i = 0, count = view_with_children->child_count(); i < count; ++i)
1432 result.append(view_with_children->child_at(i)->PrintViewGraph(false));
1433
1434 if (first)
1435 result.append("}\n");
1436
1437 return result;
1438 }
1439
1440 #endif
1441
1442 ////////////////////////////////////////////////////////////////////////////////
1443 // View, private:
1444
1445 // DropInfo --------------------------------------------------------------------
1446
1447 void View::DragInfo::Reset() {
1448 possible_drag = false;
1449 start_pt = gfx::Point();
1450 }
1451
1452 void View::DragInfo::PossibleDrag(const gfx::Point& p) {
1453 possible_drag = true;
1454 start_pt = p;
1455 }
1456
1457 // Painting --------------------------------------------------------------------
1458
1459 void View::SchedulePaintBoundsChanged(SchedulePaintType type) {
1460 // If we have a layer and the View's size did not change, we do not need to
1461 // schedule any paints since the layer will be redrawn at its new location
1462 // during the next Draw() cycle in the compositor.
1463 if (!layer() || type == SCHEDULE_PAINT_SIZE_CHANGED) {
1464 // Otherwise, if the size changes or we don't have a layer then we need to
1465 // use SchedulePaint to invalidate the area occupied by the View.
1466 SchedulePaint();
1467 } else if (parent_ && type == SCHEDULE_PAINT_SIZE_SAME) {
1468 // The compositor doesn't Draw() until something on screen changes, so
1469 // if our position changes but nothing is being animated on screen, then
1470 // tell the compositor to redraw the scene. We know layer() exists due to
1471 // the above if clause.
1472 layer()->ScheduleDraw();
1473 }
1474 }
1475
1476 void View::PaintCommon(gfx::Canvas* canvas) {
1477 if (!IsVisible() || !painting_enabled_)
1478 return;
1479
1480 {
1481 // If the View we are about to paint requested the canvas to be flipped, we
1482 // should change the transform appropriately.
1483 // The canvas mirroring is undone once the View is done painting so that we
1484 // don't pass the canvas with the mirrored transform to Views that didn't
1485 // request the canvas to be flipped.
1486 ScopedCanvas scoped(canvas);
1487 if (FlipCanvasOnPaintForRTLUI()) {
1488 canvas->Translate(gfx::Point(width(), 0));
1489 canvas->Scale(-1, 1);
1490 }
1491
1492 OnPaint(canvas);
1493 }
1494
1495 PaintChildren(canvas);
1496 }
1497
1498 // Tree operations -------------------------------------------------------------
1499
1500 void View::DoRemoveChildView(View* view,
1501 bool update_focus_cycle,
1502 bool update_tool_tip,
1503 bool delete_removed_view) {
1504 DCHECK(view);
1505 const Views::iterator i(std::find(children_.begin(), children_.end(), view));
1506 scoped_ptr<View> view_to_be_deleted;
1507 if (i != children_.end()) {
1508 if (update_focus_cycle) {
1509 // Let's remove the view from the focus traversal.
1510 View* next_focusable = view->next_focusable_view_;
1511 View* prev_focusable = view->previous_focusable_view_;
1512 if (prev_focusable)
1513 prev_focusable->next_focusable_view_ = next_focusable;
1514 if (next_focusable)
1515 next_focusable->previous_focusable_view_ = prev_focusable;
1516 }
1517
1518 if (GetWidget())
1519 UnregisterChildrenForVisibleBoundsNotification(view);
1520 view->PropagateRemoveNotifications(this);
1521 view->parent_ = NULL;
1522 view->UpdateLayerVisibility();
1523
1524 if (delete_removed_view && view->parent_owned())
1525 view_to_be_deleted.reset(view);
1526
1527 children_.erase(i);
1528 }
1529
1530 if (update_tool_tip)
1531 UpdateTooltip();
1532
1533 if (layout_manager_.get())
1534 layout_manager_->ViewRemoved(this, view);
1535 }
1536
1537 void View::PropagateRemoveNotifications(View* parent) {
1538 for (int i = 0, count = child_count(); i < count; ++i)
1539 child_at(i)->PropagateRemoveNotifications(parent);
1540
1541 for (View* v = this; v; v = v->parent_)
1542 v->ViewHierarchyChangedImpl(true, false, parent, this);
1543 }
1544
1545 void View::PropagateAddNotifications(View* parent, View* child) {
1546 for (int i = 0, count = child_count(); i < count; ++i)
1547 child_at(i)->PropagateAddNotifications(parent, child);
1548 ViewHierarchyChangedImpl(true, true, parent, child);
1549 }
1550
1551 void View::PropagateNativeViewHierarchyChanged(bool attached,
1552 gfx::NativeView native_view,
1553 internal::RootView* root_view) {
1554 for (int i = 0, count = child_count(); i < count; ++i)
1555 child_at(i)->PropagateNativeViewHierarchyChanged(attached,
1556 native_view,
1557 root_view);
1558 NativeViewHierarchyChanged(attached, native_view, root_view);
1559 }
1560
1561 void View::ViewHierarchyChangedImpl(bool register_accelerators,
1562 bool is_add,
1563 View* parent,
1564 View* child) {
1565 if (register_accelerators) {
1566 if (is_add) {
1567 // If you get this registration, you are part of a subtree that has been
1568 // added to the view hierarchy.
1569 if (GetFocusManager()) {
1570 RegisterPendingAccelerators();
1571 } else {
1572 // Delay accelerator registration until visible as we do not have
1573 // focus manager until then.
1574 accelerator_registration_delayed_ = true;
1575 }
1576 } else {
1577 if (child == this)
1578 UnregisterAccelerators(true);
1579 }
1580 }
1581
1582 if (is_add && layer() && !layer()->parent()) {
1583 UpdateParentLayer();
1584 } else if (!is_add && child == this) {
1585 // Make sure the layers beloning to the subtree rooted at |child| get
1586 // removed from layers that do not belong in the same subtree.
1587 OrphanLayers();
1588 }
1589
1590 ViewHierarchyChanged(is_add, parent, child);
1591 parent->needs_layout_ = true;
1592 }
1593
1594 // Size and disposition --------------------------------------------------------
1595
1596 void View::PropagateVisibilityNotifications(View* start, bool is_visible) {
1597 for (int i = 0, count = child_count(); i < count; ++i)
1598 child_at(i)->PropagateVisibilityNotifications(start, is_visible);
1599 VisibilityChangedImpl(start, is_visible);
1600 }
1601
1602 void View::VisibilityChangedImpl(View* starting_from, bool is_visible) {
1603 if (is_visible)
1604 RegisterPendingAccelerators();
1605 else
1606 UnregisterAccelerators(true);
1607 VisibilityChanged(starting_from, is_visible);
1608 }
1609
1610 void View::BoundsChanged(const gfx::Rect& previous_bounds) {
1611 if (IsVisible()) {
1612 // Paint the new bounds.
1613 SchedulePaintBoundsChanged(
1614 bounds_.size() == previous_bounds.size() ? SCHEDULE_PAINT_SIZE_SAME :
1615 SCHEDULE_PAINT_SIZE_CHANGED);
1616 }
1617
1618 if (use_acceleration_when_possible) {
1619 if (layer()) {
1620 if (parent_) {
1621 gfx::Point offset;
1622 parent_->CalculateOffsetToAncestorWithLayer(&offset, NULL);
1623 offset.Offset(x(), y());
1624 layer()->SetBounds(gfx::Rect(offset, size()));
1625 } else {
1626 layer()->SetBounds(bounds_);
1627 }
1628 // TODO(beng): this seems redundant with the SchedulePaint at the top of
1629 // this function. explore collapsing.
1630 if (previous_bounds.size() != bounds_.size() &&
1631 !layer()->layer_updated_externally()) {
1632 // If our bounds have changed then we need to update the complete
1633 // texture.
1634 layer()->SchedulePaint(GetLocalBounds());
1635 }
1636 } else {
1637 // If our bounds have changed, then any descendant layer bounds may
1638 // have changed. Update them accordingly.
1639 gfx::Point offset;
1640 CalculateOffsetToAncestorWithLayer(&offset, NULL);
1641 UpdateChildLayerBounds(offset);
1642 }
1643 }
1644
1645 OnBoundsChanged(previous_bounds);
1646
1647 if (previous_bounds.size() != size()) {
1648 needs_layout_ = false;
1649 Layout();
1650 }
1651
1652 if (NeedsNotificationWhenVisibleBoundsChange())
1653 OnVisibleBoundsChanged();
1654
1655 // Notify interested Views that visible bounds within the root view may have
1656 // changed.
1657 if (descendants_to_notify_.get()) {
1658 for (Views::iterator i(descendants_to_notify_->begin());
1659 i != descendants_to_notify_->end(); ++i) {
1660 (*i)->OnVisibleBoundsChanged();
1661 }
1662 }
1663 }
1664
1665 // static
1666 void View::RegisterChildrenForVisibleBoundsNotification(View* view) {
1667 if (view->NeedsNotificationWhenVisibleBoundsChange())
1668 view->RegisterForVisibleBoundsNotification();
1669 for (int i = 0; i < view->child_count(); ++i)
1670 RegisterChildrenForVisibleBoundsNotification(view->child_at(i));
1671 }
1672
1673 // static
1674 void View::UnregisterChildrenForVisibleBoundsNotification(View* view) {
1675 if (view->NeedsNotificationWhenVisibleBoundsChange())
1676 view->UnregisterForVisibleBoundsNotification();
1677 for (int i = 0; i < view->child_count(); ++i)
1678 UnregisterChildrenForVisibleBoundsNotification(view->child_at(i));
1679 }
1680
1681 void View::RegisterForVisibleBoundsNotification() {
1682 if (registered_for_visible_bounds_notification_)
1683 return;
1684
1685 registered_for_visible_bounds_notification_ = true;
1686 for (View* ancestor = parent_; ancestor; ancestor = ancestor->parent_)
1687 ancestor->AddDescendantToNotify(this);
1688 }
1689
1690 void View::UnregisterForVisibleBoundsNotification() {
1691 if (!registered_for_visible_bounds_notification_)
1692 return;
1693
1694 registered_for_visible_bounds_notification_ = false;
1695 for (View* ancestor = parent_; ancestor; ancestor = ancestor->parent_)
1696 ancestor->RemoveDescendantToNotify(this);
1697 }
1698
1699 void View::AddDescendantToNotify(View* view) {
1700 DCHECK(view);
1701 if (!descendants_to_notify_.get())
1702 descendants_to_notify_.reset(new Views);
1703 descendants_to_notify_->push_back(view);
1704 }
1705
1706 void View::RemoveDescendantToNotify(View* view) {
1707 DCHECK(view && descendants_to_notify_.get());
1708 Views::iterator i(std::find(
1709 descendants_to_notify_->begin(), descendants_to_notify_->end(), view));
1710 DCHECK(i != descendants_to_notify_->end());
1711 descendants_to_notify_->erase(i);
1712 if (descendants_to_notify_->empty())
1713 descendants_to_notify_.reset();
1714 }
1715
1716 // Transformations -------------------------------------------------------------
1717
1718 bool View::GetTransformRelativeTo(const View* ancestor,
1719 ui::Transform* transform) const {
1720 const View* p = this;
1721
1722 while (p && p != ancestor) {
1723 transform->ConcatTransform(p->GetTransform());
1724 transform->ConcatTranslate(static_cast<float>(p->GetMirroredX()),
1725 static_cast<float>(p->y()));
1726
1727 p = p->parent_;
1728 }
1729
1730 return p == ancestor;
1731 }
1732
1733 // Coordinate conversion -------------------------------------------------------
1734
1735 bool View::ConvertPointForAncestor(const View* ancestor,
1736 gfx::Point* point) const {
1737 ui::Transform trans;
1738 // TODO(sad): Have some way of caching the transformation results.
1739 bool result = GetTransformRelativeTo(ancestor, &trans);
1740 gfx::Point3f p(*point);
1741 trans.TransformPoint(p);
1742 *point = p.AsPoint();
1743 return result;
1744 }
1745
1746 bool View::ConvertPointFromAncestor(const View* ancestor,
1747 gfx::Point* point) const {
1748 ui::Transform trans;
1749 bool result = GetTransformRelativeTo(ancestor, &trans);
1750 gfx::Point3f p(*point);
1751 trans.TransformPointReverse(p);
1752 *point = p.AsPoint();
1753 return result;
1754 }
1755
1756 // Accelerated painting --------------------------------------------------------
1757
1758 void View::CreateLayer() {
1759 // A new layer is being created for the view. So all the layers of the
1760 // sub-tree can inherit the visibility of the corresponding view.
1761 for (int i = 0, count = child_count(); i < count; ++i)
1762 child_at(i)->UpdateChildLayerVisibility(true);
1763
1764 layer_.reset(new ui::Layer());
1765 layer_->set_delegate(this);
1766 #if !defined(NDEBUG)
1767 layer_->set_name(GetClassName());
1768 #endif
1769
1770 UpdateParentLayers();
1771 UpdateLayerVisibility();
1772
1773 // The new layer needs to be ordered in the layer tree according
1774 // to the view tree. Children of this layer were added in order
1775 // in UpdateParentLayers().
1776 if (parent())
1777 parent()->ReorderLayers();
1778 }
1779
1780 void View::UpdateParentLayers() {
1781 // Attach all top-level un-parented layers.
1782 if (layer() && !layer()->parent()) {
1783 UpdateParentLayer();
1784 } else {
1785 for (int i = 0, count = child_count(); i < count; ++i)
1786 child_at(i)->UpdateParentLayers();
1787 }
1788 }
1789
1790 void View::UpdateParentLayer() {
1791 if (!layer())
1792 return;
1793
1794 ui::Layer* parent_layer = NULL;
1795 gfx::Point offset(x(), y());
1796
1797 // TODO(sad): The NULL check here for parent_ essentially is to check if this
1798 // is the RootView. Instead of doing this, this function should be made
1799 // virtual and overridden from the RootView.
1800 if (parent_)
1801 parent_->CalculateOffsetToAncestorWithLayer(&offset, &parent_layer);
1802 else if (!parent_ && GetWidget())
1803 GetWidget()->CalculateOffsetToAncestorWithLayer(&offset, &parent_layer);
1804
1805 ReparentLayer(offset, parent_layer);
1806 }
1807
1808 void View::OrphanLayers() {
1809 if (layer()) {
1810 if (layer()->parent())
1811 layer()->parent()->Remove(layer());
1812
1813 // The layer belonging to this View has already been orphaned. It is not
1814 // necessary to orphan the child layers.
1815 return;
1816 }
1817 for (int i = 0, count = child_count(); i < count; ++i)
1818 child_at(i)->OrphanLayers();
1819 }
1820
1821 void View::ReparentLayer(const gfx::Point& offset, ui::Layer* parent_layer) {
1822 layer_->SetBounds(gfx::Rect(offset.x(), offset.y(), width(), height()));
1823 DCHECK_NE(layer(), parent_layer);
1824 if (parent_layer)
1825 parent_layer->Add(layer());
1826 layer_->SchedulePaint(GetLocalBounds());
1827 MoveLayerToParent(layer(), gfx::Point());
1828 }
1829
1830 void View::DestroyLayer() {
1831 ui::Layer* new_parent = layer()->parent();
1832 std::vector<ui::Layer*> children = layer()->children();
1833 for (size_t i = 0; i < children.size(); ++i) {
1834 layer()->Remove(children[i]);
1835 if (new_parent)
1836 new_parent->Add(children[i]);
1837 }
1838
1839 layer_.reset();
1840
1841 if (new_parent)
1842 ReorderLayers();
1843
1844 gfx::Point offset;
1845 CalculateOffsetToAncestorWithLayer(&offset, NULL);
1846 UpdateChildLayerBounds(offset);
1847
1848 SchedulePaint();
1849 }
1850
1851 // Input -----------------------------------------------------------------------
1852
1853 bool View::ProcessMousePressed(const MouseEvent& event, DragInfo* drag_info) {
1854 const bool enabled = IsEnabled();
1855 int drag_operations =
1856 (enabled && event.IsOnlyLeftMouseButton() && HitTest(event.location())) ?
1857 GetDragOperations(event.location()) : 0;
1858 ContextMenuController* context_menu_controller = event.IsRightMouseButton() ?
1859 context_menu_controller_ : 0;
1860
1861 const bool result = OnMousePressed(event);
1862 // WARNING: we may have been deleted, don't use any View variables.
1863
1864 if (!enabled)
1865 return result;
1866
1867 if (drag_operations != ui::DragDropTypes::DRAG_NONE) {
1868 drag_info->PossibleDrag(event.location());
1869 return true;
1870 }
1871 return !!context_menu_controller || result;
1872 }
1873
1874 bool View::ProcessMouseDragged(const MouseEvent& event, DragInfo* drag_info) {
1875 // Copy the field, that way if we're deleted after drag and drop no harm is
1876 // done.
1877 ContextMenuController* context_menu_controller = context_menu_controller_;
1878 const bool possible_drag = drag_info->possible_drag;
1879 if (possible_drag && ExceededDragThreshold(
1880 drag_info->start_pt.x() - event.x(),
1881 drag_info->start_pt.y() - event.y())) {
1882 if (!drag_controller_ ||
1883 drag_controller_->CanStartDragForView(
1884 this, drag_info->start_pt, event.location()))
1885 DoDrag(event, drag_info->start_pt);
1886 } else {
1887 if (OnMouseDragged(event))
1888 return true;
1889 // Fall through to return value based on context menu controller.
1890 }
1891 // WARNING: we may have been deleted.
1892 return (context_menu_controller != NULL) || possible_drag;
1893 }
1894
1895 void View::ProcessMouseReleased(const MouseEvent& event) {
1896 if (context_menu_controller_ && event.IsOnlyRightMouseButton()) {
1897 // Assume that if there is a context menu controller we won't be deleted
1898 // from mouse released.
1899 gfx::Point location(event.location());
1900 OnMouseReleased(event);
1901 if (HitTest(location)) {
1902 ConvertPointToScreen(this, &location);
1903 ShowContextMenu(location, true);
1904 }
1905 } else {
1906 OnMouseReleased(event);
1907 }
1908 // WARNING: we may have been deleted.
1909 }
1910
1911 ui::TouchStatus View::ProcessTouchEvent(const TouchEvent& event) {
1912 // TODO(rjkroege): Implement a grab scheme similar to as as is found in
1913 // MousePressed.
1914 return OnTouchEvent(event);
1915 }
1916
1917 // Accelerators ----------------------------------------------------------------
1918
1919 void View::RegisterPendingAccelerators() {
1920 if (!accelerators_.get() ||
1921 registered_accelerator_count_ == accelerators_->size()) {
1922 // No accelerators are waiting for registration.
1923 return;
1924 }
1925
1926 if (!GetWidget()) {
1927 // The view is not yet attached to a widget, defer registration until then.
1928 return;
1929 }
1930
1931 accelerator_focus_manager_ = GetFocusManager();
1932 if (!accelerator_focus_manager_) {
1933 // Some crash reports seem to show that we may get cases where we have no
1934 // focus manager (see bug #1291225). This should never be the case, just
1935 // making sure we don't crash.
1936
1937 // TODO(jcampan): This fails for a view under NativeWidgetGtk with
1938 // TYPE_CHILD. (see http://crbug.com/21335) reenable
1939 // NOTREACHED assertion and verify accelerators works as
1940 // expected.
1941 #if defined(OS_WIN)
1942 NOTREACHED();
1943 #endif
1944 return;
1945 }
1946 // Only register accelerators if we are visible.
1947 if (!IsVisibleInRootView() || !GetWidget()->IsVisible())
1948 return;
1949 for (std::vector<ui::Accelerator>::const_iterator i(
1950 accelerators_->begin() + registered_accelerator_count_);
1951 i != accelerators_->end(); ++i) {
1952 accelerator_focus_manager_->RegisterAccelerator(*i, this);
1953 }
1954 registered_accelerator_count_ = accelerators_->size();
1955 }
1956
1957 void View::UnregisterAccelerators(bool leave_data_intact) {
1958 if (!accelerators_.get())
1959 return;
1960
1961 if (GetWidget()) {
1962 if (accelerator_focus_manager_) {
1963 // We may not have a FocusManager if the window containing us is being
1964 // closed, in which case the FocusManager is being deleted so there is
1965 // nothing to unregister.
1966 accelerator_focus_manager_->UnregisterAccelerators(this);
1967 accelerator_focus_manager_ = NULL;
1968 }
1969 if (!leave_data_intact) {
1970 accelerators_->clear();
1971 accelerators_.reset();
1972 }
1973 registered_accelerator_count_ = 0;
1974 }
1975 }
1976
1977 // Focus -----------------------------------------------------------------------
1978
1979 void View::InitFocusSiblings(View* v, int index) {
1980 int count = child_count();
1981
1982 if (count == 0) {
1983 v->next_focusable_view_ = NULL;
1984 v->previous_focusable_view_ = NULL;
1985 } else {
1986 if (index == count) {
1987 // We are inserting at the end, but the end of the child list may not be
1988 // the last focusable element. Let's try to find an element with no next
1989 // focusable element to link to.
1990 View* last_focusable_view = NULL;
1991 for (Views::iterator i(children_.begin()); i != children_.end(); ++i) {
1992 if (!(*i)->next_focusable_view_) {
1993 last_focusable_view = *i;
1994 break;
1995 }
1996 }
1997 if (last_focusable_view == NULL) {
1998 // Hum... there is a cycle in the focus list. Let's just insert ourself
1999 // after the last child.
2000 View* prev = children_[index - 1];
2001 v->previous_focusable_view_ = prev;
2002 v->next_focusable_view_ = prev->next_focusable_view_;
2003 prev->next_focusable_view_->previous_focusable_view_ = v;
2004 prev->next_focusable_view_ = v;
2005 } else {
2006 last_focusable_view->next_focusable_view_ = v;
2007 v->next_focusable_view_ = NULL;
2008 v->previous_focusable_view_ = last_focusable_view;
2009 }
2010 } else {
2011 View* prev = children_[index]->GetPreviousFocusableView();
2012 v->previous_focusable_view_ = prev;
2013 v->next_focusable_view_ = children_[index];
2014 if (prev)
2015 prev->next_focusable_view_ = v;
2016 children_[index]->previous_focusable_view_ = v;
2017 }
2018 }
2019 }
2020
2021 // System events ---------------------------------------------------------------
2022
2023 void View::PropagateThemeChanged() {
2024 for (int i = child_count() - 1; i >= 0; --i)
2025 child_at(i)->PropagateThemeChanged();
2026 OnThemeChanged();
2027 }
2028
2029 void View::PropagateLocaleChanged() {
2030 for (int i = child_count() - 1; i >= 0; --i)
2031 child_at(i)->PropagateLocaleChanged();
2032 OnLocaleChanged();
2033 }
2034
2035 // Tooltips --------------------------------------------------------------------
2036
2037 void View::UpdateTooltip() {
2038 Widget* widget = GetWidget();
2039 // TODO(beng): The TooltipManager NULL check can be removed when we
2040 // consolidate Init() methods and make views_unittests Init() all
2041 // Widgets that it uses.
2042 if (widget && widget->native_widget_private()->GetTooltipManager())
2043 widget->native_widget_private()->GetTooltipManager()->UpdateTooltip();
2044 }
2045
2046 // Drag and drop ---------------------------------------------------------------
2047
2048 void View::DoDrag(const MouseEvent& event, const gfx::Point& press_pt) {
2049 int drag_operations = GetDragOperations(press_pt);
2050 if (drag_operations == ui::DragDropTypes::DRAG_NONE)
2051 return;
2052
2053 OSExchangeData data;
2054 WriteDragData(press_pt, &data);
2055
2056 // Message the RootView to do the drag and drop. That way if we're removed
2057 // the RootView can detect it and avoid calling us back.
2058 GetWidget()->RunShellDrag(this, data, drag_operations);
2059 }
2060
2061 } // namespace views
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