1 /*

     2  * Copyright (C) 2006, 2007 Apple Inc. All rights reserved.

     3  *

     4  * Redistribution and use in source and binary forms, with or without

     5  * modification, are permitted provided that the following conditions

     6  * are met:

     7  *

     8  * 1.  Redistributions of source code must retain the above copyright

     9  *     notice, this list of conditions and the following disclaimer. 

    10  * 2.  Redistributions in binary form must reproduce the above copyright

    11  *     notice, this list of conditions and the following disclaimer in the

    12  *     documentation and/or other materials provided with the distribution. 

    13  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of

    14  *     its contributors may be used to endorse or promote products derived

    15  *     from this software without specific prior written permission. 

    16  *

    17  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY

    18  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

    19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

    20  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY

    21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

    22  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

    23     * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND

    24  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

    25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

    26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

    27  */

    28 

    29 #import "WebDocumentLoaderMac.h"

    30 

    31 #import "WebKitVersionChecks.h"

    32 #import "WebView.h"

    33 

    34 using namespace WebCore;

    35 

    36 WebDocumentLoaderMac::WebDocumentLoaderMac(const ResourceRequest& request, const SubstituteData& substituteData)

    37     : DocumentLoader(request, substituteData)

    38     , m_dataSource(nil)

    39     , m_isDataSourceRetained(false)

    40 {

    41 }

    42 

    43 static inline bool needsDataLoadWorkaround(WebView *webView)

    44 {

    45 #ifdef BUILDING_ON_TIGER

    46     // Tiger has to be a little less efficient.

    47     id frameLoadDelegate = [webView frameLoadDelegate];

    48     if (!frameLoadDelegate)

    49         return false;

    50 

    51     NSString *bundleIdentifier = [[NSBundle bundleForClass:[frameLoadDelegate class]] bundleIdentifier];

    52 

    53     if ([bundleIdentifier isEqualToString:@"com.apple.AppKit"])

    54         return true;

    55     if ([bundleIdentifier isEqualToString:@"com.adobe.Installers.Setup"])

    56         return true;

    57     return false;

    58 #else

    59     static bool needsWorkaround = !WebKitLinkedOnOrAfter(WEBKIT_FIRST_VERSION_WITHOUT_VITALSOURCE_QUIRK) 

    60                                   && [[[NSBundle mainBundle] bundleIdentifier] isEqualToString:@"com.adobe.Installers.Setup"];

    61     return needsWorkaround;

    62 #endif

    63 }

    64 

    65 void WebDocumentLoaderMac::setDataSource(WebDataSource *dataSource, WebView *webView)

    66 {

    67     ASSERT(!m_dataSource);

    68     ASSERT(!m_isDataSourceRetained);

    69 

    70     m_dataSource = dataSource;

    71     retainDataSource();

    72 

    73     m_resourceLoadDelegate = [webView resourceLoadDelegate];

    74     m_downloadDelegate = [webView downloadDelegate];

    75     

    76     // Some clients run the run loop in a way that prevents the data load timer

    77     // from firing. We work around that issue here. See <rdar://problem/5266289>

    78     // and <rdar://problem/5049509>.

    79     if (needsDataLoadWorkaround(webView))

    80         m_deferMainResourceDataLoad = false;

    81 }

    82 

    83 WebDataSource *WebDocumentLoaderMac::dataSource() const

    84 {

    85     return m_dataSource;

    86 }

    87 

    88 void WebDocumentLoaderMac::attachToFrame()

    89 {

    90     DocumentLoader::attachToFrame();

    91 

    92     retainDataSource();

    93 }

    94 

    95 void WebDocumentLoaderMac::detachFromFrame()

    96 {

    97     DocumentLoader::detachFromFrame();

    98 

    99     if (m_loadingResources.isEmpty())

   100         releaseDataSource();

   101 

   102     // FIXME: What prevents the data source from getting deallocated while the

   103     // frame is not attached?

   104 }

   105 

   106 void WebDocumentLoaderMac::increaseLoadCount(unsigned long identifier)

   107 {

   108     ASSERT(m_dataSource);

   109 

   110     if (m_loadingResources.contains(identifier))

   111         return;

   112     m_loadingResources.add(identifier);

   113 

   114     retainDataSource();

   115 }

   116 

   117 void WebDocumentLoaderMac::decreaseLoadCount(unsigned long identifier)

   118 {

   119     HashSet<unsigned long>::iterator it = m_loadingResources.find(identifier);

   120     

   121     // It is valid for a load to be cancelled before it's started.

   122     if (it == m_loadingResources.end())

   123         return;

   124     

   125     m_loadingResources.remove(it);

   126     

   127     if (m_loadingResources.isEmpty()) {

   128         m_resourceLoadDelegate = 0;

   129         m_downloadDelegate = 0;

   130         if (!frame())

   131             releaseDataSource();

   132     }

   133 }

   134 

   135 void WebDocumentLoaderMac::retainDataSource()

   136 {

   137     if (m_isDataSourceRetained || !m_dataSource)

   138         return;

   139     m_isDataSourceRetained = true;

   140     CFRetain(m_dataSource);

   141 }

   142 

   143 void WebDocumentLoaderMac::releaseDataSource()

   144 {

   145     if (!m_isDataSourceRetained)

   146         return;

   147     ASSERT(m_dataSource);

   148     m_isDataSourceRetained = false;

   149     CFRelease(m_dataSource);

   150 }

   151 

   152 void WebDocumentLoaderMac::detachDataSource()

   153 {

   154     ASSERT(!m_isDataSourceRetained);

   155     m_dataSource = nil;

   156 }