pasteboardmac.mm

linux下开源浏览器WebKit的源码,市面上的很多商用浏览器都是移植自WebKit

/*
 * Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
 */

#import "config.h"
#import "Pasteboard.h"

#import "CachedResource.h"
#import "CharacterNames.h"
#import "DOMRangeInternal.h"
#import "Document.h"
#import "DocumentFragment.h"
#import "Editor.h"
#import "EditorClient.h"
#import "Frame.h"
#import "HitTestResult.h"
#import "Image.h"
#import "KURL.h"
#import "LegacyWebArchive.h"
#import "LoaderNSURLExtras.h"
#import "MIMETypeRegistry.h"
#import "RenderImage.h"
#import "WebCoreNSStringExtras.h"
#import "markup.h"

#import <wtf/StdLibExtras.h>
#import <wtf/RetainPtr.h>
#import <wtf/UnusedParam.h>

@interface NSAttributedString (AppKitSecretsIKnowAbout)
- (id)_initWithDOMRange:(DOMRange *)domRange;
@end

namespace WebCore {

// FIXME: It's not great to have these both here and in WebKit.
NSString *WebArchivePboardType = @"Apple Web Archive pasteboard type";
NSString *WebSmartPastePboardType = @"NeXT smart paste pasteboard type";
NSString *WebURLNamePboardType = @"public.url-name";
NSString *WebURLPboardType = @"public.url";
NSString *WebURLsWithTitlesPboardType = @"WebURLsWithTitlesPboardType";

#ifndef BUILDING_ON_TIGER
static NSArray* selectionPasteboardTypes(bool canSmartCopyOrDelete, bool selectionContainsAttachments)
{
    if (selectionContainsAttachments) {
        if (canSmartCopyOrDelete)
            return [NSArray arrayWithObjects:WebSmartPastePboardType, WebArchivePboardType, NSRTFDPboardType, NSRTFPboardType, NSStringPboardType, nil];
        else
            return [NSArray arrayWithObjects:WebArchivePboardType, NSRTFDPboardType, NSRTFPboardType, NSStringPboardType, nil];
    } else { // Don't write RTFD to the pasteboard when the copied attributed string has no attachments.
        if (canSmartCopyOrDelete)
            return [NSArray arrayWithObjects:WebSmartPastePboardType, WebArchivePboardType, NSRTFPboardType, NSStringPboardType, nil];
        else
            return [NSArray arrayWithObjects:WebArchivePboardType, NSRTFPboardType, NSStringPboardType, nil];
    }
}
#endif

static NSArray* writableTypesForURL()
{
    DEFINE_STATIC_LOCAL(RetainPtr<NSArray>, types, ([[NSArray alloc] initWithObjects:
            WebURLsWithTitlesPboardType,
            NSURLPboardType,
            WebURLPboardType,
            WebURLNamePboardType,
            NSStringPboardType,
            nil]));
    return types.get();
}

static inline NSArray* createWritableTypesForImage()
{
    NSMutableArray *types = [[NSMutableArray alloc] initWithObjects:NSTIFFPboardType, nil];
    [types addObjectsFromArray:writableTypesForURL()];
    [types addObject:NSRTFDPboardType];
    return types;
}

static NSArray* writableTypesForImage()
{
    DEFINE_STATIC_LOCAL(RetainPtr<NSArray>, types, (createWritableTypesForImage()));
    return types.get();
}

Pasteboard* Pasteboard::generalPasteboard() 
{
    static Pasteboard* pasteboard = new Pasteboard([NSPasteboard generalPasteboard]);
    return pasteboard;
}

Pasteboard::Pasteboard(NSPasteboard* pboard)
    : m_pasteboard(pboard)
{
}

void Pasteboard::clear()
{
    [m_pasteboard.get() declareTypes:[NSArray array] owner:nil];
}

static NSAttributedString *stripAttachmentCharacters(NSAttributedString *string)
{
    const unichar attachmentCharacter = NSAttachmentCharacter;
    DEFINE_STATIC_LOCAL(RetainPtr<NSString>, attachmentCharacterString, ([NSString stringWithCharacters:&attachmentCharacter length:1]));
    NSMutableAttributedString *result = [[string mutableCopy] autorelease];
    NSRange attachmentRange = [[result string] rangeOfString:attachmentCharacterString.get()];
    while (attachmentRange.location != NSNotFound) {
        [result replaceCharactersInRange:attachmentRange withString:@""];
        attachmentRange = [[result string] rangeOfString:attachmentCharacterString.get()];
    }
    return result;
}

void Pasteboard::writeSelection(NSPasteboard* pasteboard, Range* selectedRange, bool canSmartCopyOrDelete, Frame* frame)
{
    if (WebArchivePboardType == nil)
        Pasteboard::generalPasteboard(); //Initialises pasteboard types
    ASSERT(selectedRange);
    
    NSAttributedString *attributedString = [[[NSAttributedString alloc] _initWithDOMRange:[DOMRange _wrapRange:selectedRange]] autorelease];
#ifdef BUILDING_ON_TIGER
    // 4930197: Mail overrides [WebHTMLView pasteboardTypesForSelection] in order to add another type to the pasteboard
    // after WebKit does.  On Tiger we must call this function so that Mail code will be executed, meaning that 
    // we can't call WebCore::Pasteboard's method for setting types. 
    UNUSED_PARAM(canSmartCopyOrDelete);

    NSArray *types = frame->editor()->client()->pasteboardTypesForSelection(frame);
    // Don't write RTFD to the pasteboard when the copied attributed string has no attachments.
    NSMutableArray *mutableTypes = nil;
    if (![attributedString containsAttachments]) {
        mutableTypes = [[types mutableCopy] autorelease];
        [mutableTypes removeObject:NSRTFDPboardType];
        types = mutableTypes;
    }
    [pasteboard declareTypes:types owner:nil];    
#else
    NSArray *types = selectionPasteboardTypes(canSmartCopyOrDelete, [attributedString containsAttachments]);
    [pasteboard declareTypes:types owner:nil];
    frame->editor()->client()->didSetSelectionTypesForPasteboard();
#endif
    
    // Put HTML on the pasteboard.
    if ([types containsObject:WebArchivePboardType]) {
        RefPtr<LegacyWebArchive> archive = LegacyWebArchive::createFromSelection(frame);
        RetainPtr<CFDataRef> data = archive ? archive->rawDataRepresentation() : 0;
        [pasteboard setData:(NSData *)data.get() forType:WebArchivePboardType];
    }
    
    // Put the attributed string on the pasteboard (RTF/RTFD format).
    if ([types containsObject:NSRTFDPboardType]) {
        NSData *RTFDData = [attributedString RTFDFromRange:NSMakeRange(0, [attributedString length]) documentAttributes:nil];
        [pasteboard setData:RTFDData forType:NSRTFDPboardType];
    }
    if ([types containsObject:NSRTFPboardType]) {
        if ([attributedString containsAttachments])
            attributedString = stripAttachmentCharacters(attributedString);
        NSData *RTFData = [attributedString RTFFromRange:NSMakeRange(0, [attributedString length]) documentAttributes:nil];
        [pasteboard setData:RTFData forType:NSRTFPboardType];
    }
    
    // Put plain string on the pasteboard.
    if ([types containsObject:NSStringPboardType]) {
        // Map &nbsp; to a plain old space because this is better for source code, other browsers do it,
        // and because HTML forces you to do this any time you want two spaces in a row.
        String text = frame->displayStringModifiedByEncoding(selectedRange->text());
        NSMutableString *s = [[[(NSString*)text copy] autorelease] mutableCopy];
        
        NSString *NonBreakingSpaceString = [NSString stringWithCharacters:&noBreakSpace length:1];