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https://bitbucket.org/chromiumembedded/cef
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09bf0b039f
git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@364 5089003a-bbd8-11dd-ad1f-f1f9622dbc98
365 lines
13 KiB
Plaintext
365 lines
13 KiB
Plaintext
// Copyright (c) 2008-2009 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#import <Cocoa/Cocoa.h>
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#import "webwidget_host.h"
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#import "base/logging.h"
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#import "skia/ext/platform_canvas.h"
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#import "third_party/WebKit/Source/WebKit/chromium/public/mac/WebInputEventFactory.h"
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#import "third_party/WebKit/Source/WebKit/chromium/public/mac/WebScreenInfoFactory.h"
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#import "third_party/WebKit/Source/WebKit/chromium/public/WebInputEvent.h"
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#import "third_party/WebKit/Source/WebKit/chromium/public/WebPopupMenu.h"
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#import "third_party/WebKit/Source/WebKit/chromium/public/WebScreenInfo.h"
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#import "third_party/WebKit/Source/WebKit/chromium/public/WebSize.h"
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#import "ui/gfx/rect.h"
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#import "ui/gfx/size.h"
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#import "webkit/glue/webkit_glue.h"
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using WebKit::WebInputEvent;
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using WebKit::WebInputEventFactory;
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using WebKit::WebKeyboardEvent;
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using WebKit::WebMouseEvent;
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using WebKit::WebMouseWheelEvent;
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using WebKit::WebPopupMenu;
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using WebKit::WebScreenInfo;
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using WebKit::WebScreenInfoFactory;
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using WebKit::WebSize;
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using WebKit::WebWidgetClient;
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/*static*/
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WebWidgetHost* WebWidgetHost::Create(NSView* parent_view,
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WebWidgetClient* client,
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PaintDelegate* paint_delegate) {
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WebWidgetHost* host = new WebWidgetHost();
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const NSRect bounds = [parent_view bounds];
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host->view_ = [[NSView alloc] initWithFrame:bounds];
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[parent_view addSubview:host->view_];
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host->painting_ = false;
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host->layouting_ = false;
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host->webwidget_ = WebPopupMenu::create(client);
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host->webwidget_->resize(WebSize(NSWidth(bounds), NSHeight(bounds)));
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return host;
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}
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void WebWidgetHost::DidInvalidateRect(const gfx::Rect& damaged_rect) {
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const gfx::Rect client_rect(NSRectToCGRect([view_ bounds]));
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const gfx::Rect damaged_rect_in_client = client_rect.Intersect(damaged_rect);
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if (!damaged_rect_in_client.IsEmpty()) {
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paint_rect_ = paint_rect_.Union(damaged_rect_in_client);
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NSRect r = NSRectFromCGRect(damaged_rect_in_client.ToCGRect());
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r.origin.y = NSHeight([view_ bounds]) - NSMaxY(r);
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[view_ setNeedsDisplayInRect:r];
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}
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}
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void WebWidgetHost::DidScrollRect(int dx, int dy, const gfx::Rect& clip_rect) {
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DCHECK(dx || dy);
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const gfx::Rect client_rect(NSRectToCGRect([view_ bounds]));
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gfx::Rect rect = clip_rect.Intersect(client_rect);
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const int x = rect.x();
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const int y = rect.y();
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const int r = rect.right();
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const int b = rect.bottom();
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const int w = rect.width();
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const int h = rect.height();
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const int Dx = ABS(dx);
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const int Dy = ABS(dy);
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// If we're in a state right now where we cannot draw into the view then just
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// mark the scrolling rect as dirty and it will be completely redrawn instead.
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// The Paint() method can end up calling this method indirectly if the view
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// needs to be laid out; calling scrollRect:by: in this situation leads to
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// unwanted behavior. Finally, scrolling the rectangle by more than the size
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// of the view means we can just invalidate the entire scroll rect.
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if (![view_ canDraw] || painting_ || layouting_ || Dx >= w || Dy >= h) {
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DidInvalidateRect(clip_rect);
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return;
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}
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// The scrolling rect must not scroll outside the clip rect because that will
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// clobber the scrollbars. As a result we shorten the rectangle a bit from the
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// leading side of the scroll (could be either horizontally or vertically).
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if (dx > 0)
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rect = gfx::Rect(x, y, w - dx, h);
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else if (dx < 0)
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rect = gfx::Rect(x - dx, y, w + dx, h);
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else if (dy > 0)
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rect = gfx::Rect(x, y, w, h - dy);
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else if (dy < 0)
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rect = gfx::Rect(x, y - dy, w, h + dy);
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// Convert the scroll rectangle to the view's coordinate system and perform
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// the scroll directly without invalidating the view. In theory this could
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// cause some kind of performance issue since we're not coalescing redraw
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// events. In practice, however, we get much smoother scrolling of big views
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// since just copying the pixels within the window is much faster than
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// redrawing them.
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NSRect cocoa_rect = NSRectFromCGRect(rect.ToCGRect());
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cocoa_rect.origin.y = NSHeight([view_ bounds]) - NSMaxY(cocoa_rect);
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[view_ scrollRect:cocoa_rect by:NSMakeSize(dx, -dy)];
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const gfx::Rect saved_paint_rect = paint_rect_;
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if (![view_ lockFocusIfCanDraw])
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return;
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// Repaint the rectangle that was revealed when scrolling the given rectangle.
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// We don't want to invalidate this rectangle because that would cause the
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// invalidated area to be L-shaped due to the combination of this narrow area
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// and the scrollbar area that may also be invalidated. The union of these two
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// rectangles is pretty much the entire view area and we would not save any
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// work by doing the scrollRect: call above.
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if (dx > 0)
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paint_rect_ = gfx::Rect(x, y, dx, h);
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else if (dx < 0)
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paint_rect_ = gfx::Rect(r + dx, y, -dx, h);
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else if (dy > 0)
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paint_rect_ = gfx::Rect(x, y, w, dy);
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else if (dy < 0)
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paint_rect_ = gfx::Rect(x, b + dy, w, -dy);
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paint_rect_ = paint_rect_.Intersect(client_rect);
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if (!paint_rect_.IsEmpty())
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Paint(paint_rect_);
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// If any part of the scrolled rect was marked as dirty make sure to redraw
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// it in the new scrolled-to location. Otherwise we can end up with artifacts
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// for overlapping elements.
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gfx::Rect moved_paint_rect = saved_paint_rect.Intersect(clip_rect);
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if (!moved_paint_rect.IsEmpty()) {
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moved_paint_rect.Offset(dx, dy);
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paint_rect_ = moved_paint_rect;
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paint_rect_ = paint_rect_.Intersect(client_rect);
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if (!paint_rect_.IsEmpty())
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Paint(paint_rect_);
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}
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[view_ unlockFocus];
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paint_rect_ = saved_paint_rect;
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}
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void WebWidgetHost::ScheduleComposite() {
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if (!webwidget_)
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return;
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const WebSize size = webwidget_->size();
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[view_ setNeedsDisplayInRect:NSMakeRect(0, 0, size.width, size.height)];
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}
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WebWidgetHost::WebWidgetHost()
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: view_(NULL),
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paint_delegate_(NULL),
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webwidget_(NULL),
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canvas_w_(0),
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canvas_h_(0),
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popup_(false),
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has_update_task_(false),
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ALLOW_THIS_IN_INITIALIZER_LIST(weak_factory_(this)) {
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set_painting(false);
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}
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WebWidgetHost::~WebWidgetHost() {
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}
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void WebWidgetHost::Paint(const gfx::Rect& dirty_rect) {
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gfx::Rect client_rect(NSRectToCGRect([view_ bounds]));
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gfx::Rect copy_rect = dirty_rect;
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// Union the rectangle that WebKit think needs repainting with the rectangle
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// of the view that must be painted now. In most situations this will not
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// affect the painted rectangle. In some situations we could end up re-
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// painting areas that are already in the canvas and only dirty in the view
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// itself. However, if we don't do this we can get artifacts when scrolling
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// because contents of the canvas are no longer correct after scrolling only
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// in the view.
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paint_rect_ = paint_rect_.Union(dirty_rect);
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// When we are not using accelerated compositing the canvas area is allowed
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// to differ in size from the client by a certain number of pixels (128 in
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// this case). When accelerated compositing is in effect the size must match
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// exactly.
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const int extra_w = (webwidget_->isAcceleratedCompositingActive()? 0: 128);
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const int extra_h = (webwidget_->isAcceleratedCompositingActive()? 0: 128);
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const int min_w = client_rect.width();
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const int min_h = client_rect.height();
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const int max_w = client_rect.width() + extra_w * 2;
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const int max_h = client_rect.height() + extra_h * 2;
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const bool too_small = (canvas_w_ < min_w || canvas_h_ < min_h);
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const bool too_large = (canvas_w_ > max_w || canvas_h_ > max_h);
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if (!canvas_.get() || too_small || too_large) {
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canvas_w_ = client_rect.width() + extra_w;
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canvas_h_ = client_rect.height() + extra_h;
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canvas_.reset(new skia::PlatformCanvas(canvas_w_, canvas_h_, true));
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}
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// Animate the view and layout any views that have not been laid out yet. The
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// latter may result in more invalidation. Keep track of the fact that we are
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// laying out views, because this will sometimes cause ScrollRect to be called
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// and we don't want to try to scrollRect:by: then.
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layouting_ = true;
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webwidget_->animate(0.0);
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webwidget_->layout();
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layouting_ = false;
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// Draw into the graphics context of the canvas instead of the view's context.
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// The view's context is pushed onto the context stack to be restored below.
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CGContextRef bitmap = skia::GetBitmapContext(skia::GetTopDevice(*canvas_));
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NSGraphicsContext* paint_context =
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[NSGraphicsContext graphicsContextWithGraphicsPort:bitmap flipped:YES];
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[NSGraphicsContext saveGraphicsState];
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[NSGraphicsContext setCurrentContext:paint_context];
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// Paint the canvas if necessary. The painting operation can cause additional
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// rectangles to be invalidated because some elements are laid out only the
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// first time they are painted.
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paint_rect_ = client_rect.Intersect(paint_rect_);
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const gfx::Rect paint_rect = paint_rect_;
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paint_rect_ = gfx::Rect();
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PaintRect(paint_rect);
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if (!paint_rect_.IsEmpty()) {
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copy_rect = copy_rect.Union(paint_rect_);
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const gfx::Rect paint_rect = paint_rect_;
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paint_rect_ = gfx::Rect();
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PaintRect(paint_rect);
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}
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// Set the context back to our view and copy the bitmap that we just painted
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// into to the view. Only the region that was updated is copied.
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[NSGraphicsContext restoreGraphicsState];
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NSGraphicsContext* view_context = [NSGraphicsContext currentContext];
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CGContextRef context = static_cast<CGContextRef>([view_context graphicsPort]);
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CGRect bitmap_rect = { { copy_rect.x(), copy_rect.y() },
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{ copy_rect.width(), copy_rect.height() } };
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skia::DrawToNativeContext(canvas_.get(), context, copy_rect.x(),
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client_rect.height() - copy_rect.bottom(), &bitmap_rect);
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}
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void WebWidgetHost::SetTooltipText(const CefString& tooltip_text)
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{
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// TODO(port): Implement this method as part of tooltip support.
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}
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void WebWidgetHost::InvalidateRect(const gfx::Rect& rect)
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{
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// TODO(port): Implement this method as part of off-screen rendering support.
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NOTIMPLEMENTED();
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}
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bool WebWidgetHost::GetImage(int width, int height, void* rgba_buffer)
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{
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if (!canvas_.get())
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return false;
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// TODO(port): Implement this method as part of off-screen rendering support.
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NOTIMPLEMENTED();
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return false;
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}
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WebScreenInfo WebWidgetHost::GetScreenInfo() {
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return WebScreenInfoFactory::screenInfo(view_);
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}
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void WebWidgetHost::Resize(const gfx::Rect& rect) {
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SetSize(rect.width(), rect.height());
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}
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void WebWidgetHost::MouseEvent(NSEvent *event) {
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const WebMouseEvent& web_event = WebInputEventFactory::mouseEvent(
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event, view_);
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webwidget_->handleInputEvent(web_event);
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}
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void WebWidgetHost::WheelEvent(NSEvent *event) {
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webwidget_->handleInputEvent(
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WebInputEventFactory::mouseWheelEvent(event, view_));
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}
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void WebWidgetHost::KeyEvent(NSEvent *event) {
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WebKeyboardEvent keyboard_event(WebInputEventFactory::keyboardEvent(event));
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last_key_event_ = keyboard_event;
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webwidget_->handleInputEvent(keyboard_event);
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if ([event type] == NSKeyDown &&
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!([event modifierFlags] & NSNumericPadKeyMask)) {
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// Send a Char event here to emulate the keyboard events. Do not send a
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// Char event for arrow keys (NSNumericPadKeyMask modifier will be set).
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// TODO(hbono): Bug 20852 <http://crbug.com/20852> implement the
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// NSTextInput protocol and remove this code.
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keyboard_event.type = WebInputEvent::Char;
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last_key_event_ = keyboard_event;
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webwidget_->handleInputEvent(keyboard_event);
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}
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}
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void WebWidgetHost::SetFocus(bool enable) {
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webwidget_->setFocus(enable);
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}
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void WebWidgetHost::PaintRect(const gfx::Rect& rect) {
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#ifndef NDEBUG
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DCHECK(!painting_);
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#endif
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DCHECK(canvas_.get());
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if (!rect.IsEmpty()) {
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set_painting(true);
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webwidget_->paint(webkit_glue::ToWebCanvas(canvas_.get()), rect);
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set_painting(false);
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}
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}
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void WebWidgetHost::SendKeyEvent(cef_key_type_t type, int key, int modifiers,
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bool sysChar, bool imeChar)
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{
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// TODO(port): Implement this method as part of off-screen rendering support.
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NOTIMPLEMENTED();
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}
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void WebWidgetHost::SendMouseClickEvent(int x, int y,
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cef_mouse_button_type_t type,
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bool mouseUp, int clickCount)
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{
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// TODO(port): Implement this method as part of off-screen rendering support.
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NOTIMPLEMENTED();
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}
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void WebWidgetHost::SendMouseMoveEvent(int x, int y, bool mouseLeave)
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{
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// TODO(port): Implement this method as part of off-screen rendering support.
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NOTIMPLEMENTED();
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}
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void WebWidgetHost::SendMouseWheelEvent(int x, int y, int delta)
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{
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// TODO(port): Implement this method as part of off-screen rendering support.
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NOTIMPLEMENTED();
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}
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void WebWidgetHost::SendFocusEvent(bool setFocus)
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{
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// TODO(port): Implement this method as part of off-screen rendering support.
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NOTIMPLEMENTED();
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}
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void WebWidgetHost::SendCaptureLostEvent()
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{
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// TODO(port): Implement this method as part of off-screen rendering support.
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NOTIMPLEMENTED();
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}
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void WebWidgetHost::EnsureTooltip()
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{
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// TODO(port): Implement this method as part of tooltip support.
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}
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void WebWidgetHost::ResetTooltip()
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{
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// TODO(port): Implement this method as part of tooltip support.
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}
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