webframeloaderclient.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, 2007, 2008, 2009 Apple 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. 
 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
 *     its contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission. 
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "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 OR ITS 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 "WebFrameLoaderClient.h"

// Terrible hack; lets us get at the WebFrame private structure.
#define private public
#import "WebFrame.h"
#undef private

#import "DOMElementInternal.h"
#import "WebBackForwardList.h"
#import "WebCachedFramePlatformData.h"
#import "WebChromeClient.h"
#import "WebDataSourceInternal.h"
#import "WebDocumentInternal.h"
#import "WebDocumentLoaderMac.h"
#import "WebDownloadInternal.h"
#import "WebDynamicScrollBarsViewInternal.h"
#import "WebElementDictionary.h"
#import "WebFormDelegate.h"
#import "WebFrameInternal.h"
#import "WebFrameLoadDelegate.h"
#import "WebFrameViewInternal.h"
#import "WebHTMLRepresentationPrivate.h"
#import "WebHTMLViewInternal.h"
#import "WebHistoryItemInternal.h"
#import "WebHistoryInternal.h"
#import "WebIconDatabaseInternal.h"
#import "WebKitErrorsPrivate.h"
#import "WebKitLogging.h"
#import "WebKitNSStringExtras.h"
#import "WebNSURLExtras.h"
#import "WebNetscapePluginView.h"
#import "WebNetscapePluginPackage.h"
#import "WebNullPluginView.h"
#import "WebPanelAuthenticationHandler.h"
#import "WebPluginController.h"
#import "WebPluginPackage.h"
#import "WebPluginViewFactoryPrivate.h"
#import "WebPolicyDelegate.h"
#import "WebPolicyDelegatePrivate.h"
#import "WebPreferences.h"
#import "WebResourceLoadDelegate.h"
#import "WebUIDelegate.h"
#import "WebUIDelegatePrivate.h"
#import "WebViewInternal.h"
#import <WebKitSystemInterface.h>
#import <WebCore/AuthenticationMac.h>
#import <WebCore/BlockExceptions.h>
#import <WebCore/CachedFrame.h>
#import <WebCore/Chrome.h>
#import <WebCore/Document.h>
#import <WebCore/DocumentLoader.h>
#import <WebCore/EventHandler.h>
#import <WebCore/FormState.h>
#import <WebCore/Frame.h>
#import <WebCore/FrameLoader.h>
#import <WebCore/FrameLoaderTypes.h>
#import <WebCore/FrameTree.h>
#import <WebCore/FrameView.h>
#import <WebCore/HTMLAppletElement.h>
#import <WebCore/HTMLHeadElement.h>
#import <WebCore/HTMLFormElement.h>
#import <WebCore/HTMLFrameElement.h>
#import <WebCore/HTMLFrameOwnerElement.h>
#import <WebCore/HTMLNames.h>
#import <WebCore/HTMLPlugInElement.h>
#import <WebCore/HistoryItem.h>
#import <WebCore/HitTestResult.h>
#import <WebCore/IconDatabase.h>
#import <WebCore/LoaderNSURLExtras.h>
#import <WebCore/MIMETypeRegistry.h>
#import <WebCore/MouseEvent.h>
#import <WebCore/Page.h>
#import <WebCore/PlatformString.h>
#import <WebCore/ResourceError.h>
#import <WebCore/ResourceHandle.h>
#import <WebCore/ResourceLoader.h>
#import <WebCore/ResourceRequest.h>
#import <WebCore/ScriptController.h>
#import <WebCore/SharedBuffer.h>
#import <WebCore/WebCoreObjCExtras.h>
#import <WebCore/Widget.h>
#import <WebKit/DOMElement.h>
#import <WebKit/DOMHTMLFormElement.h>
#import <runtime/InitializeThreading.h>
#import <wtf/PassRefPtr.h>

#if ENABLE(MAC_JAVA_BRIDGE)
#import "WebJavaPlugIn.h"
#endif

#if USE(PLUGIN_HOST_PROCESS)
#import "WebHostedNetscapePluginView.h"
#endif

using namespace WebCore;
using namespace HTMLNames;

#if ENABLE(MAC_JAVA_BRIDGE)
@interface NSView (WebJavaPluginDetails)
- (jobject)pollForAppletInWindow:(NSWindow *)window;
@end
#endif

@interface NSURLDownload (WebNSURLDownloadDetails)
- (void)_setOriginatingURL:(NSURL *)originatingURL;
@end

// For backwards compatibility with older WebKit plug-ins.
NSString *WebPluginBaseURLKey = @"WebPluginBaseURL";
NSString *WebPluginAttributesKey = @"WebPluginAttributes";
NSString *WebPluginContainerKey = @"WebPluginContainer";

@interface WebFramePolicyListener : NSObject <WebPolicyDecisionListener, WebFormSubmissionListener> {
    Frame* m_frame;
}
- (id)initWithWebCoreFrame:(Frame*)frame;
- (void)invalidate;
@end

static inline WebDataSource *dataSource(DocumentLoader* loader)
{
    return loader ? static_cast<WebDocumentLoaderMac*>(loader)->dataSource() : nil;
}

// Quirk for the Apple Dictionary application.
//
// If a top level frame has a <script> element in its <head> for a script named MainPageJavaScript.js,
// then for that frame's document, ignore changes to the scrolling attribute of frames. That script
// has a bug in it where it sets the scrolling attribute on frames, and that erroneous scrolling
// attribute needs to be ignored to avoid showing extra scroll bars in the window.
// This quirk can be removed when Apple Dictionary is fixed (see <rdar://problem/6471058>).

static void applyAppleDictionaryApplicationQuirkNonInlinePart(WebFrameLoaderClient* client, const ResourceRequest& request)
{
    if (!request.url().isLocalFile())
        return;
    if (!request.url().string().endsWith("MainPageJavaScript.js"))
        return;
    Frame* frame = core(client->webFrame());
    if (!frame)
        return;
    if (frame->tree()->parent())
        return;
    Document* document = frame->document();
    if (!document)
        return;
    HTMLHeadElement* head = document->head();
    if (!head)
        return;
    for (Node* c = head->firstChild(); c; c = c->nextSibling()) {
        if (c->hasTagName(scriptTag) && static_cast<Element*>(c)->getAttribute(srcAttr) == "MainPageJavaScript.js") {
            document->setFrameElementsShouldIgnoreScrolling(true);
            return;
        }
    }
}

static inline void applyAppleDictionaryApplicationQuirk(WebFrameLoaderClient* client, const ResourceRequest& request)
{
    // Use a one-time-initialized global variable so we can quickly determine there's nothing to do in
    // all applications other than Apple Dictionary.
    static bool isAppleDictionary = [[[NSBundle mainBundle] bundleIdentifier] isEqualToString:@"com.apple.Dictionary"];
    if (isAppleDictionary)
        applyAppleDictionaryApplicationQuirkNonInlinePart(client, request);
}

WebFrameLoaderClient::WebFrameLoaderClient(WebFrame *webFrame)
    : m_webFrame(webFrame)
    , m_policyFunction(0)
{
}

void WebFrameLoaderClient::frameLoaderDestroyed()
{
    [m_webFrame.get() _clearCoreFrame];
    delete this;
}

bool WebFrameLoaderClient::hasWebView() const
{
    return [m_webFrame.get() webView] != nil;
}

void WebFrameLoaderClient::makeRepresentation(DocumentLoader* loader)
{
    [dataSource(loader) _makeRepresentation];
}

bool WebFrameLoaderClient::hasHTMLView() const
{
    NSView <WebDocumentView> *view = [m_webFrame->_private->webFrameView documentView];
    return [view isKindOfClass:[WebHTMLView class]];
}

void WebFrameLoaderClient::forceLayout()
{
    NSView <WebDocumentView> *view = [m_webFrame->_private->webFrameView documentView];
    if ([view isKindOfClass:[WebHTMLView class]])
        [(WebHTMLView *)view setNeedsToApplyStyles:YES];
    [view setNeedsLayout:YES];
    [view layout];
}

void WebFrameLoaderClient::forceLayoutForNonHTML()
{
    WebFrameView *thisView = m_webFrame->_private->webFrameView;
    if (!thisView) // Viewless mode.
        return;
    NSView <WebDocumentView> *thisDocumentView = [thisView documentView];
    ASSERT(thisDocumentView != nil);
    
    // Tell the just loaded document to layout.  This may be necessary
    // for non-html content that needs a layout message.
    if (!([[m_webFrame.get() _dataSource] _isDocumentHTML])) {
        [thisDocumentView setNeedsLayout:YES];
        [thisDocumentView layout];
        [thisDocumentView setNeedsDisplay:YES];
    }
}

void WebFrameLoaderClient::setCopiesOnScroll()
{
    [[[m_webFrame->_private->webFrameView _scrollView] contentView] setCopiesOnScroll:YES];
}

void WebFrameLoaderClient::detachedFromParent2()
{
    //remove any NetScape plugins that are children of this frame because they are about to be detached
    WebView *webView = getWebView(m_webFrame.get());
    [webView removePluginInstanceViewsFor:(m_webFrame.get())];
    [m_webFrame->_private->webFrameView _setWebFrame:nil]; // needed for now to be compatible w/ old behavior
}

void WebFrameLoaderClient::detachedFromParent3()
{
    [m_webFrame->_private->webFrameView release];
    m_webFrame->_private->webFrameView = nil;
}

void WebFrameLoaderClient::download(ResourceHandle* handle, const ResourceRequest& request, const ResourceRequest& initialRequest, const ResourceResponse& response)
{
    id proxy = handle->releaseProxy();
    ASSERT(proxy);
    
    WebView *webView = getWebView(m_webFrame.get());
    WebDownload *download = [WebDownload _downloadWithLoadingConnection:handle->connection()
                                                                request:request.nsURLRequest()
                                                               response:response.nsURLResponse()
                                                               delegate:[webView downloadDelegate]
                                                                  proxy:proxy];
    
    setOriginalURLForDownload(download, initialRequest);    
}

void WebFrameLoaderClient::setOriginalURLForDownload(WebDownload *download, const ResourceRequest& initialRequest) const
{
    NSURLRequest *initialURLRequest = initialRequest.nsURLRequest();
    NSURL *originalURL = nil;
    
    // If there was no referrer, don't traverse the back/forward history
    // since this download was initiated directly. <rdar://problem/5294691>
    if ([initialURLRequest valueForHTTPHeaderField:@"Referer"]) {
        // find the first item in the history that was originated by the user
        WebView *webView = getWebView(m_webFrame.get());
        WebBackForwardList *history = [webView backForwardList];
        int backListCount = [history backListCount];
        for (int backIndex = 0; backIndex <= backListCount && !originalURL; backIndex++) {
            // FIXME: At one point we had code here to check a "was user gesture" flag.
            // Do we need to restore that logic?
            originalURL = [[history itemAtIndex:-backIndex] URL];
        }
    }

    if (!originalURL)
        originalURL = [initialURLRequest URL];

    if ([download respondsToSelector:@selector(_setOriginatingURL:)]) {
        NSString *scheme = [originalURL scheme];
        NSString *host = [originalURL host];
        if (scheme && host && [scheme length] && [host length]) {
            NSNumber *port = [originalURL port];
            if (port && [port intValue] < 0)
                port = nil;
            NSString *hostOnlyURLString;
            if (port)
                hostOnlyURLString = [[NSString alloc] initWithFormat:@"%@://%@:%d", scheme, host, [port intValue]];