Extending the Views-on-Mac experiment: whole app list grid.

ui/views_core/bridged_view_impl_mac.mm

+// Copyright 2014 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.
+
+#import "ui/views_core/bridged_view_impl_mac.h"
+
+#include "base/memory/scoped_ptr.h"
+#include "ui/accessibility/ax_view_state.h"
+#include "ui/base/layout.h"
+#include "ui/gfx/canvas.h"
+#include "ui/gfx/canvas_paint_mac.h"
+#include "ui/gfx/geometry/vector2d_f.h"
+#include "ui/gfx/image/image.h"
+#include "ui/views/view.h"
+#include "ui/views/widget/root_view.h"
+#include "ui/views/widget/widget.h"
+
+#include "base/debug/stack_trace.h"
+
+namespace {
+
+template <class OSTREAM>
+OSTREAM& operator<<(OSTREAM& out, const NSRect& rect) {
+  CGFloat x = rect.origin.x;
+  CGFloat y = rect.origin.y;
+  out << '[' << rect.size.width << 'x' << rect.size.height
+      << (x < 0 ? '-' : '+') << x << (y < 0 ? '-' : '+') << y << ']';
+  return out;
+}
+
+template <class OSTREAM>
+OSTREAM& operator<<(OSTREAM& out, const NSPoint& point) {
+  out << '(' << point.x << ',' << point.y << ')';
+  return out;
+}
+
+}
+
+@interface BridgedViewImpl ()
+
+- (void)handleMouseEvent:(NSEvent*)theEvent;
+
+@end
+
+namespace views {
+
+class NSViewNativeWidget : public internal::NativeWidgetPrivate {
+
+};
+
+class NSViewBridgeWidget : public views::Widget {
+ public:
+  NSViewBridgeWidget(BridgedViewImpl* parent) : parent_(parent) {}
+
+ protected:
+  // views::Widget:
+  virtual internal::RootView* CreateRootView() OVERRIDE;
+
+ private:
+  BridgedViewImpl* parent_;  // Weak. Owns us.
+};
+
+class NSViewBridge : public internal::RootView {
+ public:
+  NSViewBridge(views::Widget* widget, BridgedViewImpl* parent)
+      : internal::RootView(widget),
+        parent_(parent) {
+  }
+
+ protected:
+  // views::View:
+  virtual void OnBoundsChanged(const gfx::Rect& previous_bounds) OVERRIDE;
+  virtual void ViewHierarchyChanged(
+      const ViewHierarchyChangedDetails& details) OVERRIDE;
+  virtual void ChildPreferredSizeChanged(View* child) OVERRIDE;
+  virtual void OnVisibleBoundsChanged() OVERRIDE;
+  virtual void SchedulePaintInRect(const gfx::Rect& r) OVERRIDE;
+
+ private:
+  BridgedViewImpl* parent_;  // Weak. Owns us.
+};
+
+internal::RootView* NSViewBridgeWidget::CreateRootView() {
+  return new NSViewBridge(this, parent_);
+}
+
+void NSViewBridge::OnBoundsChanged(const gfx::Rect& previous_bounds) {
+  [parent_ setFrame:NSRectFromCGRect(bounds().ToCGRect())];
+}
+
+void NSViewBridge::ViewHierarchyChanged(
+    const ViewHierarchyChangedDetails& details) {
+  if (details.is_add && details.parent == this) {
+    DCHECK_EQ(1, child_count());
+
+    // This is kinda backwards, but we need notification of bounds changes.
+    details.child->AddDescendantToNotify(this);
+
+    DLOG(INFO) << "NSViewBridge hosting: " << details.child->GetClassName();
+  }
+}
+
+void NSViewBridge::ChildPreferredSizeChanged(View* child) {
+  SetBoundsRect(child->bounds());
+}
+
+void NSViewBridge::OnVisibleBoundsChanged() {
+  ChildPreferredSizeChanged([parent_ view]);
+}
+
+void NSViewBridge::SchedulePaintInRect(const gfx::Rect& r) {
+  [parent_ setNeedsDisplay:YES];
+}
+
+}  // namespace views
+
+@implementation BridgedViewImpl
+
+- (id)initWithView:(scoped_ptr<views::View>)viewToHost {
+  DCHECK(viewToHost);
+  CGRect initialFrame = viewToHost->bounds().ToCGRect();
+  if ((self = [super initWithFrame:NSRectFromCGRect(initialFrame)])) {
+    widget_.reset(new views::NSViewBridgeWidget(self));
+    views::Widget::InitParams initParams;
+    initParams.type = views::Widget::InitParams::TYPE_CONTROL;
+    widget_->Init(initParams);
+
+    widget_->GetRootView()->AddChildView(viewToHost.release());
+    hostedView_ = widget_->GetRootView()->child_at(0);
+  }
+  return self;
+}
+
+- (views::View*)view {
+  return hostedView_;
+}
+
+- (void)clearView {
+  hostedView_ = NULL;
+  bridge_.reset();
+}
+
+// BridgedViewImpl private implementation.
+
+- (void)handleMouseEvent:(NSEvent*)theEvent {
+  if (!hostedView_)
+    return;
+
+  ui::MouseEvent event(theEvent);
+
+  NSPoint windowLocation = [theEvent locationInWindow];
+  NSPoint viewLocation = [self convertPoint:windowLocation fromView:nil];
+  event.set_location(event.location() + gfx::Vector2dF(
+      viewLocation.x - windowLocation.x,
+      viewLocation.y - windowLocation.y));
+
+  {
+    gfx::Point uiViewLocation = event.location();
+    views::View::ConvertPointFromWidget(hostedView_, &uiViewLocation);
+
+    DLOG(INFO) << "Forwarding mouse event in " << [self frame]
+        << " " << hostedView_->GetClassName() << ":"
+        << " window" << windowLocation
+        << " view" << viewLocation
+        << " ui.Location: " << event.location_f().ToString()
+        << " ui.ViewLocation: " << uiViewLocation.ToString();
+  }
+
+  widget_->OnMouseEvent(&event);
+}
+
+// NSView implementation.
+
+- (void)drawRect:(NSRect)dirtyRect {
+  if (!hostedView_)
+    return;
+
+  DLOG(INFO) << "Painting.";
+  gfx::CanvasSkiaPaint canvas(dirtyRect, false /* opaque */);
+  hostedView_->Paint(&canvas);
+}
+
+- (void)mouseDown:(NSEvent*)theEvent {
+  [self handleMouseEvent:theEvent];
+}
+
+- (void)mouseDragged:(NSEvent*)theEvent {
+  [self handleMouseEvent:theEvent];
+}
+
+- (void)mouseUp:(NSEvent*)theEvent {
+  [self handleMouseEvent:theEvent];
+}
+
+// NSAccessibility informal protocol implementation.
+
+- (NSArray*)accessibilityAttributeNames {
+  NSMutableArray* attributes =
+      [[super accessibilityAttributeNames] mutableCopy];
+  if (!hostedView_)
+    return [attributes autorelease];
+
+  [attributes addObject:NSAccessibilityValueAttribute];
+  [attributes addObject:NSAccessibilityDescriptionAttribute];
+  return [attributes autorelease];
+}
+
+- (id)accessibilityAttributeValue:(NSString*)attribute {
+  if (!hostedView_)
+    return [super accessibilityAttributeValue:attribute];
+
+  ui::AXViewState state;
+  hostedView_->GetAccessibleState(&state);
+  switch (state.role) {
+    default:
+      NOTREACHED();
+  }
+#if 0
+  if ([attribute isEqual:NSAccessibilityRoleAttribute])
+    return NSAccessibilityTabGroupRole;
+  if ([attribute isEqual:NSAccessibilityTabsAttribute]) {
+    NSMutableArray* tabs = [[[NSMutableArray alloc] init] autorelease];
+    NSArray* children =
+        [self accessibilityAttributeValue:NSAccessibilityChildrenAttribute];
+    for (id child in children) {
+      if ([[child accessibilityAttributeValue:NSAccessibilityRoleAttribute]
+          isEqual:NSAccessibilityRadioButtonRole]) {
+        [tabs addObject:child];
+      }
+    }
+    return tabs;
+  }
+  if ([attribute isEqual:NSAccessibilityContentsAttribute])
+    return [self accessibilityAttributeValue:NSAccessibilityChildrenAttribute];
+  if ([attribute isEqual:NSAccessibilityValueAttribute])
+    return [controller_ activeTabView];
+#endif
+
+  return [super accessibilityAttributeValue:attribute];
+}
+
+@end