cef/libcef/web_drop_target_mac.mm

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// Copyright (c) 2011 The Chromium Embedded Framework Authors.
// Portions copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "browser_impl.h"
#import "browser_webview_mac.h"
#include "cef_context.h"
#include "drag_data_impl.h"
#import "web_drop_target_mac.h"
#import "web_drag_utils_mac.h"
#include "base/logging.h"
#include "base/sys_string_conversions.h"
#import "third_party/mozilla/NSPasteboard+Utils.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebDragData.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebDragOperation.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebPoint.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebView.h"
#include "webkit/glue/webdropdata.h"
#include "webkit/glue/window_open_disposition.h"
using WebKit::WebDragOperation;
using WebKit::WebDragOperationsMask;
using WebKit::WebPoint;
using WebKit::WebView;
@implementation WebDropTarget
// |view| is the WebView representing this browser window, used to communicate
// drag&drop messages to WebCore and handle navigation on a successful drop
// (if necessary).
- (id)initWithWebView:(BrowserWebView*)view {
if ((self = [super init])) {
view_ = view;
canceled_ = false;
}
return self;
}
// Given a point in window coordinates and a view in that window, return a
// flipped point in the coordinate system of |view|.
- (NSPoint)flipWindowPointToView:(const NSPoint&)windowPoint
view:(NSView*)view {
DCHECK(view);
NSPoint viewPoint = [view convertPoint:windowPoint fromView:nil];
NSRect viewFrame = [view frame];
viewPoint.y = viewFrame.size.height - viewPoint.y;
return viewPoint;
}
// Given a point in window coordinates and a view in that window, return a
// flipped point in screen coordinates.
- (NSPoint)flipWindowPointToScreen:(const NSPoint&)windowPoint
view:(NSView*)view {
DCHECK(view);
NSPoint screenPoint = [[view window] convertBaseToScreen:windowPoint];
NSScreen* screen = [[view window] screen];
NSRect screenFrame = [screen frame];
screenPoint.y = screenFrame.size.height - screenPoint.y;
return screenPoint;
}
// Return YES if the drop site only allows drops that would navigate. If this
// is the case, we don't want to pass messages to the renderer because there's
// really no point (i.e., there's nothing that cares about the mouse position or
// entering and exiting). One example is an interstitial page (e.g., safe
// browsing warning).
- (BOOL)onlyAllowsNavigation {
return false;
}
// Messages to send during the tracking of a drag, usually upon receiving
// calls from the view system. Communicates the drag messages to WebCore.
- (NSDragOperation)draggingEntered:(id<NSDraggingInfo>)info
view:(NSView*)view {
// Save off the current WebViewHost so we can tell if it changes during a
// drag. If it does, we need to send a new enter message in draggingUpdated:.
current_wvh_ = _Context->current_webviewhost();
DCHECK(current_wvh_);
if ([self onlyAllowsNavigation]) {
if ([[info draggingPasteboard] containsURLData])
return NSDragOperationCopy;
return NSDragOperationNone;
}
WebView* webview = view_.browser->UIT_GetWebView();
// Fill out a WebDropData from pasteboard.
WebDropData drop_data;
[self populateWebDropData:&drop_data
fromPasteboard:[info draggingPasteboard]];
NSDragOperation mask = [info draggingSourceOperationMask];
canceled_ = false;
CefRefPtr<CefClient> client = view_.browser->GetClient();
if (client.get()) {
CefRefPtr<CefDragHandler> handler = client->GetDragHandler();
if (handler.get()) {
CefRefPtr<CefDragData> data(new CefDragDataImpl(drop_data));
if (handler->OnDragEnter(view_.browser, data,
static_cast<CefDragHandler::DragOperationsMask>(mask))) {
canceled_ = true;
return NSDragOperationNone;
}
}
}
// Create the appropriate mouse locations for WebCore. The draggingLocation
// is in window coordinates. Both need to be flipped.
NSPoint windowPoint = [info draggingLocation];
NSPoint viewPoint = [self flipWindowPointToView:windowPoint view:view];
NSPoint screenPoint = [self flipWindowPointToScreen:windowPoint view:view];
WebDragOperation op =
webview->dragTargetDragEnter(drop_data.ToDragData(),
WebPoint(viewPoint.x, viewPoint.y),
WebPoint(screenPoint.x, screenPoint.y),
static_cast<WebDragOperationsMask>(mask));
return static_cast<NSDragOperation>(op);
}
- (void)draggingExited:(id<NSDraggingInfo>)info {
DCHECK(current_wvh_);
if (current_wvh_ != _Context->current_webviewhost())
return;
if (canceled_)
return;
WebView* webview = view_.browser->UIT_GetWebView();
// Nothing to do in the interstitial case.
webview->dragTargetDragLeave();
}
- (NSDragOperation)draggingUpdated:(id<NSDraggingInfo>)info
view:(NSView*)view {
DCHECK(current_wvh_);
if (current_wvh_ != _Context->current_webviewhost())
[self draggingEntered:info view:view];
if ([self onlyAllowsNavigation]) {
if ([[info draggingPasteboard] containsURLData])
return NSDragOperationCopy;
return NSDragOperationNone;
}
if (canceled_)
return NSDragOperationNone;
WebView* webview = view_.browser->UIT_GetWebView();
// Create the appropriate mouse locations for WebCore. The draggingLocation
// is in window coordinates.
NSPoint windowPoint = [info draggingLocation];
NSPoint viewPoint = [self flipWindowPointToView:windowPoint view:view];
NSPoint screenPoint = [self flipWindowPointToScreen:windowPoint view:view];
NSDragOperation mask = [info draggingSourceOperationMask];
WebDragOperation op =
webview->dragTargetDragOver(WebPoint(viewPoint.x, viewPoint.y),
WebPoint(screenPoint.x, screenPoint.y),
static_cast<WebDragOperationsMask>(mask));
return static_cast<NSDragOperation>(op);
}
- (BOOL)performDragOperation:(id<NSDraggingInfo>)info
view:(NSView*)view {
DCHECK(current_wvh_);
if (current_wvh_ != _Context->current_webviewhost())
[self draggingEntered:info view:view];
// Check if we only allow navigation and navigate to a url on the pasteboard.
if ([self onlyAllowsNavigation]) {
NSPasteboard* pboard = [info draggingPasteboard];
if ([pboard containsURLData]) {
GURL url;
drag_util::PopulateURLAndTitleFromPasteBoard(&url, NULL, pboard, YES);
view_.browser->GetMainFrame()->LoadURL(url.spec());
return YES;
}
return NO;
}
current_wvh_ = NULL;
WebView* webview = view_.browser->UIT_GetWebView();
// Create the appropriate mouse locations for WebCore. The draggingLocation
// is in window coordinates. Both need to be flipped.
NSPoint windowPoint = [info draggingLocation];
NSPoint viewPoint = [self flipWindowPointToView:windowPoint view:view];
NSPoint screenPoint = [self flipWindowPointToScreen:windowPoint view:view];
view_.browser->set_is_dropping(true);
webview->dragTargetDrop(gfx::Point(viewPoint.x, viewPoint.y),
gfx::Point(screenPoint.x, screenPoint.y));
view_.browser->set_is_dropping(false);
return YES;
}
// Given |data|, which should not be nil, fill it in using the contents of the
// given pasteboard.
- (void)populateWebDropData:(WebDropData*)data
fromPasteboard:(NSPasteboard*)pboard {
DCHECK(data);
DCHECK(pboard);
NSArray* types = [pboard types];
// Get URL if possible. To avoid exposing file system paths to web content,
// filenames in the drag are not converted to file URLs.
drag_util::PopulateURLAndTitleFromPasteBoard(&data->url,
&data->url_title,
pboard,
NO);
// Get plain text.
if ([types containsObject:NSStringPboardType]) {
data->plain_text =
base::SysNSStringToUTF16([pboard stringForType:NSStringPboardType]);
}
// Get HTML. If there's no HTML, try RTF.
if ([types containsObject:NSHTMLPboardType]) {
data->text_html =
base::SysNSStringToUTF16([pboard stringForType:NSHTMLPboardType]);
} else if ([types containsObject:NSRTFPboardType]) {
NSString* html = [pboard htmlFromRtf];
data->text_html = base::SysNSStringToUTF16(html);
}
// Get files.
if ([types containsObject:NSFilenamesPboardType]) {
NSArray* files = [pboard propertyListForType:NSFilenamesPboardType];
if ([files isKindOfClass:[NSArray class]] && [files count]) {
for (NSUInteger i = 0; i < [files count]; i++) {
NSString* filename = [files objectAtIndex:i];
BOOL isDir = NO;
BOOL exists = [[NSFileManager defaultManager] fileExistsAtPath:filename
isDirectory:&isDir];
if (exists && !isDir)
data->filenames.push_back(base::SysNSStringToUTF16(filename));
}
}
}
// TODO(pinkerton): Get file contents. http://crbug.com/34661
}
@end