mirror of
https://github.com/mozilla/gecko-dev.git
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567 lines
20 KiB
Plaintext
567 lines
20 KiB
Plaintext
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifdef MOZ_LOGGING
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#define FORCE_PR_LOG
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#endif
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#include "prlog.h"
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#include "nsDragService.h"
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#include "nsObjCExceptions.h"
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#include "nsITransferable.h"
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#include "nsString.h"
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#include "nsClipboard.h"
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#include "nsXPCOM.h"
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#include "nsISupportsPrimitives.h"
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#include "nsCOMPtr.h"
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#include "nsPrimitiveHelpers.h"
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#include "nsLinebreakConverter.h"
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#include "nsIMacUtils.h"
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#include "nsIDOMNode.h"
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#include "nsRect.h"
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#include "nsPoint.h"
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#include "nsIIOService.h"
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#include "nsNetUtil.h"
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#include "nsIDocument.h"
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#include "nsIContent.h"
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#include "nsView.h"
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#include "gfxASurface.h"
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#include "gfxContext.h"
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#include "nsCocoaUtils.h"
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#ifdef PR_LOGGING
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extern PRLogModuleInfo* sCocoaLog;
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#endif
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extern void EnsureLogInitialized();
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extern NSPasteboard* globalDragPboard;
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extern NSView* gLastDragView;
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extern NSEvent* gLastDragMouseDownEvent;
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extern bool gUserCancelledDrag;
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// This global makes the transferable array available to Cocoa's promised
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// file destination callback.
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nsISupportsArray *gDraggedTransferables = nullptr;
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NSString* const kWildcardPboardType = @"MozillaWildcard";
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NSString* const kCorePboardType_url = @"CorePasteboardFlavorType 0x75726C20"; // 'url ' url
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NSString* const kCorePboardType_urld = @"CorePasteboardFlavorType 0x75726C64"; // 'urld' desc
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NSString* const kCorePboardType_urln = @"CorePasteboardFlavorType 0x75726C6E"; // 'urln' title
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nsDragService::nsDragService()
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{
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mNativeDragView = nil;
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mNativeDragEvent = nil;
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EnsureLogInitialized();
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}
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nsDragService::~nsDragService()
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{
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}
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static nsresult SetUpDragClipboard(nsISupportsArray* aTransferableArray)
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{
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NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;
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if (!aTransferableArray)
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return NS_ERROR_FAILURE;
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uint32_t count = 0;
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aTransferableArray->Count(&count);
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NSPasteboard* dragPBoard = [NSPasteboard pasteboardWithName:NSDragPboard];
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for (uint32_t i = 0; i < count; i++) {
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nsCOMPtr<nsISupports> currentTransferableSupports;
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aTransferableArray->GetElementAt(i, getter_AddRefs(currentTransferableSupports));
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if (!currentTransferableSupports)
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return NS_ERROR_FAILURE;
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nsCOMPtr<nsITransferable> currentTransferable(do_QueryInterface(currentTransferableSupports));
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if (!currentTransferable)
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return NS_ERROR_FAILURE;
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// Transform the transferable to an NSDictionary
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NSDictionary* pasteboardOutputDict = nsClipboard::PasteboardDictFromTransferable(currentTransferable);
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if (!pasteboardOutputDict)
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return NS_ERROR_FAILURE;
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// write everything out to the general pasteboard
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unsigned int typeCount = [pasteboardOutputDict count];
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NSMutableArray* types = [NSMutableArray arrayWithCapacity:typeCount + 1];
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[types addObjectsFromArray:[pasteboardOutputDict allKeys]];
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// Gecko is initiating this drag so we always want its own views to consider
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// it. Add our wildcard type to the pasteboard to accomplish this.
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[types addObject:kWildcardPboardType]; // we don't increase the count for the loop below on purpose
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[dragPBoard declareTypes:types owner:nil];
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for (unsigned int i = 0; i < typeCount; i++) {
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NSString* currentKey = [types objectAtIndex:i];
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id currentValue = [pasteboardOutputDict valueForKey:currentKey];
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if (currentKey == NSStringPboardType ||
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currentKey == kCorePboardType_url ||
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currentKey == kCorePboardType_urld ||
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currentKey == kCorePboardType_urln) {
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[dragPBoard setString:currentValue forType:currentKey];
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}
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else if (currentKey == NSHTMLPboardType) {
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[dragPBoard setString:(nsClipboard::WrapHtmlForSystemPasteboard(currentValue))
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forType:currentKey];
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}
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else if (currentKey == NSTIFFPboardType) {
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[dragPBoard setData:currentValue forType:currentKey];
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}
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else if (currentKey == NSFilesPromisePboardType ||
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currentKey == NSFilenamesPboardType) {
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[dragPBoard setPropertyList:currentValue forType:currentKey];
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}
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}
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}
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return NS_OK;
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NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
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}
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NSImage*
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nsDragService::ConstructDragImage(nsIDOMNode* aDOMNode,
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nsIntRect* aDragRect,
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nsIScriptableRegion* aRegion)
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{
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NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL;
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NSPoint screenPoint =
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[[gLastDragView window] convertBaseToScreen:
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[gLastDragMouseDownEvent locationInWindow]];
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// Y coordinates are bottom to top, so reverse this
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screenPoint.y = nsCocoaUtils::FlippedScreenY(screenPoint.y);
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CGFloat scaleFactor = nsCocoaUtils::GetBackingScaleFactor(gLastDragView);
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nsRefPtr<gfxASurface> surface;
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nsPresContext* pc;
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nsresult rv = DrawDrag(aDOMNode, aRegion,
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NSToIntRound(screenPoint.x),
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NSToIntRound(screenPoint.y),
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aDragRect, getter_AddRefs(surface), &pc);
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if (!aDragRect->width || !aDragRect->height) {
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// just use some suitable defaults
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int32_t size = nsCocoaUtils::CocoaPointsToDevPixels(20, scaleFactor);
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aDragRect->SetRect(nsCocoaUtils::CocoaPointsToDevPixels(screenPoint.x, scaleFactor),
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nsCocoaUtils::CocoaPointsToDevPixels(screenPoint.y, scaleFactor),
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size, size);
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}
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if (NS_FAILED(rv) || !surface)
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return nil;
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uint32_t width = aDragRect->width;
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uint32_t height = aDragRect->height;
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nsRefPtr<gfxImageSurface> imgSurface = new gfxImageSurface(
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gfxIntSize(width, height), gfxImageFormatARGB32);
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if (!imgSurface)
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return nil;
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nsRefPtr<gfxContext> context = new gfxContext(imgSurface);
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if (!context)
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return nil;
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context->SetOperator(gfxContext::OPERATOR_SOURCE);
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context->SetSource(surface);
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context->Paint();
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uint32_t* imageData = (uint32_t*)imgSurface->Data();
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int32_t stride = imgSurface->Stride();
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NSBitmapImageRep* imageRep =
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[[NSBitmapImageRep alloc] initWithBitmapDataPlanes:NULL
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pixelsWide:width
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pixelsHigh:height
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bitsPerSample:8
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samplesPerPixel:4
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hasAlpha:YES
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isPlanar:NO
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colorSpaceName:NSDeviceRGBColorSpace
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bytesPerRow:width * 4
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bitsPerPixel:32];
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uint8_t* dest = [imageRep bitmapData];
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for (uint32_t i = 0; i < height; ++i) {
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uint8_t* src = (uint8_t *)imageData + i * stride;
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for (uint32_t j = 0; j < width; ++j) {
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// Reduce transparency overall by multipying by a factor. Remember, Alpha
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// is premultipled here. Also, Quartz likes RGBA, so do that translation as well.
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#ifdef IS_BIG_ENDIAN
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dest[0] = uint8_t(src[1] * DRAG_TRANSLUCENCY);
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dest[1] = uint8_t(src[2] * DRAG_TRANSLUCENCY);
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dest[2] = uint8_t(src[3] * DRAG_TRANSLUCENCY);
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dest[3] = uint8_t(src[0] * DRAG_TRANSLUCENCY);
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#else
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dest[0] = uint8_t(src[2] * DRAG_TRANSLUCENCY);
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dest[1] = uint8_t(src[1] * DRAG_TRANSLUCENCY);
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dest[2] = uint8_t(src[0] * DRAG_TRANSLUCENCY);
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dest[3] = uint8_t(src[3] * DRAG_TRANSLUCENCY);
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#endif
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src += 4;
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dest += 4;
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}
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}
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NSImage* image =
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[[NSImage alloc] initWithSize:NSMakeSize(width / scaleFactor,
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height / scaleFactor)];
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[image addRepresentation:imageRep];
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[imageRep release];
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return [image autorelease];
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NS_OBJC_END_TRY_ABORT_BLOCK_NIL;
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}
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// We can only invoke NSView's 'dragImage:at:offset:event:pasteboard:source:slideBack:' from
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// within NSView's 'mouseDown:' or 'mouseDragged:'. Luckily 'mouseDragged' is always on the
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// stack when InvokeDragSession gets called.
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NS_IMETHODIMP
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nsDragService::InvokeDragSession(nsIDOMNode* aDOMNode, nsISupportsArray* aTransferableArray,
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nsIScriptableRegion* aDragRgn, uint32_t aActionType)
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{
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NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;
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nsresult rv = nsBaseDragService::InvokeDragSession(aDOMNode,
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aTransferableArray,
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aDragRgn, aActionType);
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NS_ENSURE_SUCCESS(rv, rv);
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mDataItems = aTransferableArray;
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// put data on the clipboard
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if (NS_FAILED(SetUpDragClipboard(aTransferableArray)))
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return NS_ERROR_FAILURE;
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nsIntRect dragRect(0, 0, 20, 20);
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NSImage* image = ConstructDragImage(aDOMNode, &dragRect, aDragRgn);
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if (!image) {
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// if no image was returned, just draw a rectangle
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NSSize size;
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size.width = dragRect.width;
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size.height = dragRect.height;
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image = [[NSImage alloc] initWithSize:size];
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[image lockFocus];
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[[NSColor grayColor] set];
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NSBezierPath* path = [NSBezierPath bezierPath];
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[path setLineWidth:2.0];
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[path moveToPoint:NSMakePoint(0, 0)];
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[path lineToPoint:NSMakePoint(0, size.height)];
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[path lineToPoint:NSMakePoint(size.width, size.height)];
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[path lineToPoint:NSMakePoint(size.width, 0)];
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[path lineToPoint:NSMakePoint(0, 0)];
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[path stroke];
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[image unlockFocus];
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}
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nsIntPoint pt(dragRect.x, dragRect.YMost());
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CGFloat scaleFactor = nsCocoaUtils::GetBackingScaleFactor(gLastDragView);
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NSPoint point = nsCocoaUtils::DevPixelsToCocoaPoints(pt, scaleFactor);
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point.y = nsCocoaUtils::FlippedScreenY(point.y);
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point = [[gLastDragView window] convertScreenToBase: point];
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NSPoint localPoint = [gLastDragView convertPoint:point fromView:nil];
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// Save the transferables away in case a promised file callback is invoked.
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gDraggedTransferables = aTransferableArray;
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nsBaseDragService::StartDragSession();
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nsBaseDragService::OpenDragPopup();
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// We need to retain the view and the event during the drag in case either gets destroyed.
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mNativeDragView = [gLastDragView retain];
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mNativeDragEvent = [gLastDragMouseDownEvent retain];
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gUserCancelledDrag = false;
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[mNativeDragView dragImage:image
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at:localPoint
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offset:NSZeroSize
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event:mNativeDragEvent
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pasteboard:[NSPasteboard pasteboardWithName:NSDragPboard]
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source:mNativeDragView
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slideBack:YES];
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gUserCancelledDrag = false;
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if (mDoingDrag)
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nsBaseDragService::EndDragSession(false);
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return NS_OK;
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NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
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}
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NS_IMETHODIMP
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nsDragService::GetData(nsITransferable* aTransferable, uint32_t aItemIndex)
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{
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NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;
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if (!aTransferable)
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return NS_ERROR_FAILURE;
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// get flavor list that includes all acceptable flavors (including ones obtained through conversion)
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nsCOMPtr<nsISupportsArray> flavorList;
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nsresult rv = aTransferable->FlavorsTransferableCanImport(getter_AddRefs(flavorList));
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if (NS_FAILED(rv))
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return NS_ERROR_FAILURE;
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uint32_t acceptableFlavorCount;
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flavorList->Count(&acceptableFlavorCount);
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// if this drag originated within Mozilla we should just use the cached data from
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// when the drag started if possible
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if (mDataItems) {
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nsCOMPtr<nsISupports> currentTransferableSupports;
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mDataItems->GetElementAt(aItemIndex, getter_AddRefs(currentTransferableSupports));
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if (currentTransferableSupports) {
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nsCOMPtr<nsITransferable> currentTransferable(do_QueryInterface(currentTransferableSupports));
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if (currentTransferable) {
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for (uint32_t i = 0; i < acceptableFlavorCount; i++) {
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nsCOMPtr<nsISupports> genericFlavor;
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flavorList->GetElementAt(i, getter_AddRefs(genericFlavor));
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nsCOMPtr<nsISupportsCString> currentFlavor(do_QueryInterface(genericFlavor));
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if (!currentFlavor)
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continue;
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nsXPIDLCString flavorStr;
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currentFlavor->ToString(getter_Copies(flavorStr));
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nsCOMPtr<nsISupports> dataSupports;
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uint32_t dataSize = 0;
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rv = currentTransferable->GetTransferData(flavorStr, getter_AddRefs(dataSupports), &dataSize);
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if (NS_SUCCEEDED(rv)) {
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aTransferable->SetTransferData(flavorStr, dataSupports, dataSize);
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return NS_OK; // maybe try to fill in more types? Is there a point?
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}
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}
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}
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}
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}
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// now check the actual clipboard for data
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for (uint32_t i = 0; i < acceptableFlavorCount; i++) {
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nsCOMPtr<nsISupports> genericFlavor;
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flavorList->GetElementAt(i, getter_AddRefs(genericFlavor));
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nsCOMPtr<nsISupportsCString> currentFlavor(do_QueryInterface(genericFlavor));
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if (!currentFlavor)
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continue;
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nsXPIDLCString flavorStr;
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currentFlavor->ToString(getter_Copies(flavorStr));
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PR_LOG(sCocoaLog, PR_LOG_ALWAYS, ("nsDragService::GetData: looking for clipboard data of type %s\n", flavorStr.get()));
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if (flavorStr.EqualsLiteral(kFileMime)) {
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NSArray* pFiles = [globalDragPboard propertyListForType:NSFilenamesPboardType];
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if (!pFiles || [pFiles count] < (aItemIndex + 1))
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continue;
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NSString* filePath = [pFiles objectAtIndex:aItemIndex];
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if (!filePath)
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continue;
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unsigned int stringLength = [filePath length];
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unsigned int dataLength = (stringLength + 1) * sizeof(PRUnichar); // in bytes
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PRUnichar* clipboardDataPtr = (PRUnichar*)malloc(dataLength);
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if (!clipboardDataPtr)
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return NS_ERROR_OUT_OF_MEMORY;
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[filePath getCharacters:reinterpret_cast<unichar*>(clipboardDataPtr)];
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clipboardDataPtr[stringLength] = 0; // null terminate
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nsCOMPtr<nsIFile> file;
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nsresult rv = NS_NewLocalFile(nsDependentString(clipboardDataPtr), true, getter_AddRefs(file));
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free(clipboardDataPtr);
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if (NS_FAILED(rv))
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continue;
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aTransferable->SetTransferData(flavorStr, file, dataLength);
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break;
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}
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NSString *pboardType = NSStringPboardType;
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if (nsClipboard::IsStringType(flavorStr, &pboardType) ||
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flavorStr.EqualsLiteral(kURLMime) ||
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flavorStr.EqualsLiteral(kURLDataMime) ||
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flavorStr.EqualsLiteral(kURLDescriptionMime)) {
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NSString* pString = [globalDragPboard stringForType:pboardType];
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if (!pString)
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continue;
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NSData* stringData = [pString dataUsingEncoding:NSUnicodeStringEncoding];
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unsigned int dataLength = [stringData length];
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void* clipboardDataPtr = malloc(dataLength);
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if (!clipboardDataPtr)
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return NS_ERROR_OUT_OF_MEMORY;
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[stringData getBytes:clipboardDataPtr];
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// The DOM only wants LF, so convert from MacOS line endings to DOM line endings.
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int32_t signedDataLength = dataLength;
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nsLinebreakHelpers::ConvertPlatformToDOMLinebreaks(flavorStr, &clipboardDataPtr, &signedDataLength);
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dataLength = signedDataLength;
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// skip BOM (Byte Order Mark to distinguish little or big endian)
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PRUnichar* clipboardDataPtrNoBOM = (PRUnichar*)clipboardDataPtr;
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if ((dataLength > 2) &&
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((clipboardDataPtrNoBOM[0] == 0xFEFF) ||
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(clipboardDataPtrNoBOM[0] == 0xFFFE))) {
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dataLength -= sizeof(PRUnichar);
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clipboardDataPtrNoBOM += 1;
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}
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nsCOMPtr<nsISupports> genericDataWrapper;
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nsPrimitiveHelpers::CreatePrimitiveForData(flavorStr, clipboardDataPtrNoBOM, dataLength,
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getter_AddRefs(genericDataWrapper));
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aTransferable->SetTransferData(flavorStr, genericDataWrapper, dataLength);
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free(clipboardDataPtr);
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break;
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}
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// We have never supported this on Mac OS X, we should someday. Normally dragging images
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// in is accomplished with a file path drag instead of the image data itself.
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/*
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if (flavorStr.EqualsLiteral(kPNGImageMime) || flavorStr.EqualsLiteral(kJPEGImageMime) ||
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flavorStr.EqualsLiteral(kJPGImageMime) || flavorStr.EqualsLiteral(kGIFImageMime)) {
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}
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*/
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}
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return NS_OK;
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NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
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}
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NS_IMETHODIMP
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nsDragService::IsDataFlavorSupported(const char *aDataFlavor, bool *_retval)
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{
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NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;
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*_retval = false;
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if (!globalDragPboard)
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return NS_ERROR_FAILURE;
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nsDependentCString dataFlavor(aDataFlavor);
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// first see if we have data for this in our cached transferable
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if (mDataItems) {
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uint32_t dataItemsCount;
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mDataItems->Count(&dataItemsCount);
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for (unsigned int i = 0; i < dataItemsCount; i++) {
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nsCOMPtr<nsISupports> currentTransferableSupports;
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mDataItems->GetElementAt(i, getter_AddRefs(currentTransferableSupports));
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if (!currentTransferableSupports)
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continue;
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nsCOMPtr<nsITransferable> currentTransferable(do_QueryInterface(currentTransferableSupports));
|
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if (!currentTransferable)
|
|
continue;
|
|
|
|
nsCOMPtr<nsISupportsArray> flavorList;
|
|
nsresult rv = currentTransferable->FlavorsTransferableCanImport(getter_AddRefs(flavorList));
|
|
if (NS_FAILED(rv))
|
|
continue;
|
|
|
|
uint32_t flavorCount;
|
|
flavorList->Count(&flavorCount);
|
|
for (uint32_t j = 0; j < flavorCount; j++) {
|
|
nsCOMPtr<nsISupports> genericFlavor;
|
|
flavorList->GetElementAt(j, getter_AddRefs(genericFlavor));
|
|
nsCOMPtr<nsISupportsCString> currentFlavor(do_QueryInterface(genericFlavor));
|
|
if (!currentFlavor)
|
|
continue;
|
|
nsXPIDLCString flavorStr;
|
|
currentFlavor->ToString(getter_Copies(flavorStr));
|
|
if (dataFlavor.Equals(flavorStr)) {
|
|
*_retval = true;
|
|
return NS_OK;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
NSString *pboardType = nil;
|
|
|
|
if (dataFlavor.EqualsLiteral(kFileMime)) {
|
|
NSString* availableType = [globalDragPboard availableTypeFromArray:[NSArray arrayWithObject:NSFilenamesPboardType]];
|
|
if (availableType && [availableType isEqualToString:NSFilenamesPboardType])
|
|
*_retval = true;
|
|
}
|
|
else if (dataFlavor.EqualsLiteral(kURLMime)) {
|
|
NSString* availableType = [globalDragPboard availableTypeFromArray:[NSArray arrayWithObject:kCorePboardType_url]];
|
|
if (availableType && [availableType isEqualToString:kCorePboardType_url])
|
|
*_retval = true;
|
|
}
|
|
else if (nsClipboard::IsStringType(dataFlavor, &pboardType)) {
|
|
NSString* availableType = [globalDragPboard availableTypeFromArray:[NSArray arrayWithObject:pboardType]];
|
|
if (availableType && [availableType isEqualToString:pboardType])
|
|
*_retval = true;
|
|
}
|
|
|
|
return NS_OK;
|
|
|
|
NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsDragService::GetNumDropItems(uint32_t* aNumItems)
|
|
{
|
|
NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;
|
|
|
|
*aNumItems = 0;
|
|
|
|
// first check to see if we have a number of items cached
|
|
if (mDataItems) {
|
|
mDataItems->Count(aNumItems);
|
|
return NS_OK;
|
|
}
|
|
|
|
// if there is a clipboard and there is something on it, then there is at least 1 item
|
|
NSArray* clipboardTypes = [globalDragPboard types];
|
|
if (globalDragPboard && [clipboardTypes count] > 0)
|
|
*aNumItems = 1;
|
|
else
|
|
return NS_OK;
|
|
|
|
// if there is a list of files, send the number of files in that list
|
|
NSArray* fileNames = [globalDragPboard propertyListForType:NSFilenamesPboardType];
|
|
if (fileNames)
|
|
*aNumItems = [fileNames count];
|
|
|
|
return NS_OK;
|
|
|
|
NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsDragService::EndDragSession(bool aDoneDrag)
|
|
{
|
|
NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;
|
|
|
|
if (mNativeDragView) {
|
|
[mNativeDragView release];
|
|
mNativeDragView = nil;
|
|
}
|
|
if (mNativeDragEvent) {
|
|
[mNativeDragEvent release];
|
|
mNativeDragEvent = nil;
|
|
}
|
|
|
|
mUserCancelled = gUserCancelledDrag;
|
|
|
|
nsresult rv = nsBaseDragService::EndDragSession(aDoneDrag);
|
|
mDataItems = nullptr;
|
|
return rv;
|
|
|
|
NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
|
|
}
|