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// Copyright (c) 2010 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 "chrome/browser/ui/cocoa/web_contents_drag_source.h"
#include "app/mac/nsimage_cache.h"
#include "base/string_util.h"
#include "base/sys_string_conversions.h"
#include "chrome/browser/renderer_host/render_view_host.h"
#include "chrome/browser/tab_contents/tab_contents.h"
#include "chrome/browser/tab_contents/tab_contents_view_mac.h"
namespace {
// Make a drag image from the drop data.
// TODO(feldstein): Make this work
NSImage* MakeDragImage() {
// TODO(feldstein): Just a stub for now. Make it do something (see, e.g.,
// WebKit/WebKit/mac/Misc/WebNSViewExtras.m: |-_web_DragImageForElement:...|).
// Default to returning a generic image.
return app::mac::GetCachedImageWithName(@"nav.pdf");
}
// Flips screen and point coordinates over the y axis to work with webkit
// coordinate systems.
void FlipPointCoordinates(NSPoint& screenPoint,
NSPoint& localPoint,
NSView* view) {
NSRect viewFrame = [view frame];
localPoint.y = NSHeight(viewFrame) - localPoint.y;
// Flip |screenPoint|.
NSRect screenFrame = [[[view window] screen] frame];
screenPoint.y = NSHeight(screenFrame) - screenPoint.y;
}
} // namespace
@implementation WebContentsDragSource
- (id)initWithContentsView:(TabContentsViewCocoa*)contentsView
pasteboard:(NSPasteboard*)pboard
dragOperationMask:(NSDragOperation)dragOperationMask {
if ((self = [super init])) {
contentsView_ = contentsView;
DCHECK(contentsView_);
pasteboard_.reset([pboard retain]);
DCHECK(pasteboard_.get());
dragOperationMask_ = dragOperationMask;
}
return self;
}
- (NSImage*)dragImage {
return MakeDragImage();
}
- (void)fillPasteboard {
NOTIMPLEMENTED() << "Subclasses should implement fillPasteboard";
}
- (NSDragOperation)draggingSourceOperationMaskForLocal:(BOOL)isLocal {
return dragOperationMask_;
}
- (void)startDrag {
[self fillPasteboard];
NSEvent* currentEvent = [NSApp currentEvent];
// Synthesize an event for dragging, since we can't be sure that
// [NSApp currentEvent] will return a valid dragging event.
NSWindow* window = [contentsView_ window];
NSPoint position = [window mouseLocationOutsideOfEventStream];
NSTimeInterval eventTime = [currentEvent timestamp];
NSEvent* dragEvent = [NSEvent mouseEventWithType:NSLeftMouseDragged
location:position
modifierFlags:NSLeftMouseDraggedMask
timestamp:eventTime
windowNumber:[window windowNumber]
context:nil
eventNumber:0
clickCount:1
pressure:1.0];
[window dragImage:[self dragImage]
at:position
offset:NSZeroSize
event:dragEvent
pasteboard:pasteboard_
source:self
slideBack:YES];
}
- (void)draggedImage:(NSImage *)anImage endedAt:(NSPoint)aPoint
operation:(NSDragOperation)operation {
}
- (void)endDragAt:(NSPoint)screenPoint
operation:(NSDragOperation)operation {
RenderViewHost* rvh = [contentsView_ tabContents]->render_view_host();
if (rvh) {
rvh->DragSourceSystemDragEnded();
NSPoint localPoint = [contentsView_ convertPoint:screenPoint fromView: nil];
FlipPointCoordinates(screenPoint, localPoint, contentsView_);
rvh->DragSourceEndedAt(localPoint.x, localPoint.y,
screenPoint.x, screenPoint.y,
static_cast<WebKit::WebDragOperation>(operation));
}
// Make sure the pasteboard owner isn't us.
[pasteboard_ declareTypes:[NSArray array] owner:nil];
}
- (void)moveDragTo:(NSPoint)screenPoint {
RenderViewHost* rvh = [contentsView_ tabContents]->render_view_host();
if (rvh) {
NSPoint localPoint = [contentsView_ convertPoint:screenPoint fromView:nil];
FlipPointCoordinates(screenPoint, localPoint, contentsView_);
rvh->DragSourceMovedTo(localPoint.x, localPoint.y,
screenPoint.x, screenPoint.y);
}
}
@end // @implementation WebContentsDragSource
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