webnetscapepluginpackage.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) 2005, 2006, 2007 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.
 */

#if ENABLE(NETSCAPE_PLUGIN_API)
#import "WebNetscapePluginPackage.h"

#import "WebKitLogging.h"
#import "WebKitNSStringExtras.h"
#import "WebNSObjectExtras.h"
#import "WebNetscapeDeprecatedFunctions.h"
#import <WebCore/npruntime_impl.h>

#if USE(PLUGIN_HOST_PROCESS)
#import "NetscapePluginHostManager.h"

using namespace WebKit;
#endif

#ifdef SUPPORT_CFM
typedef void (* FunctionPointer)(void);
typedef void (* TransitionVector)(void);
static FunctionPointer functionPointerForTVector(TransitionVector);
static TransitionVector tVectorForFunctionPointer(FunctionPointer);
#endif

#define PluginNameOrDescriptionStringNumber     126
#define MIMEDescriptionStringNumber             127
#define MIMEListStringStringNumber              128

#define RealPlayerAppIndentifier                @"com.RealNetworks.RealOne Player"
#define RealPlayerPluginFilename                @"RealPlayer Plugin"

@interface WebNetscapePluginPackage (Internal)
- (void)_unloadWithShutdown:(BOOL)shutdown;
@end

@implementation WebNetscapePluginPackage

#ifndef __LP64__
+ (void)initialize
{
    // The Shockwave plugin requires a valid file in CurApRefNum.
    // But it doesn't seem to matter what file it is.
    // If we're called inside a Cocoa application which won't have a
    // CurApRefNum, we set it to point to the system resource file.

    // Call CurResFile before testing the result of WebLMGetCurApRefNum.
    // If we are called before the bundle resource map has been opened
    // for a Carbon application (or a Cocoa app with Resource Manager
    // resources) we *do not* want to set CurApRefNum to point at the
    // system resource file. CurResFile triggers Resource Manager lazy
    // initialization, and will open the bundle resource map as necessary.

    CurResFile();

    if (WebLMGetCurApRefNum() == -1) {
        // To get the refNum for the system resource file, we have to do
        // UseResFile(kSystemResFile) and then look at CurResFile().
        short savedCurResFile = CurResFile();
        UseResFile(kSystemResFile);
        WebLMSetCurApRefNum(CurResFile());
        UseResFile(savedCurResFile);
    }
}
#endif

- (ResFileRefNum)openResourceFile
{
#ifdef SUPPORT_CFM
    if (!isBundle) {
        FSRef fref;
        OSErr err = FSPathMakeRef((const UInt8 *)[path fileSystemRepresentation], &fref, NULL);
        if (err != noErr)
            return -1;
        
        return FSOpenResFile(&fref, fsRdPerm);
    }
#endif

    return CFBundleOpenBundleResourceMap(cfBundle);
}

- (void)closeResourceFile:(ResFileRefNum)resRef
{
#ifdef SUPPORT_CFM
    if (!isBundle) {
        CloseResFile(resRef);
        return;
    }
#endif

    CFBundleCloseBundleResourceMap(cfBundle, resRef);
}

- (NSString *)stringForStringListID:(SInt16)stringListID andIndex:(SInt16)index
{
    // Get resource, and dereference the handle.
    Handle stringHandle = Get1Resource('STR#', stringListID);
    if (stringHandle == NULL) {
        return nil;
    }
    unsigned char *p = (unsigned char *)*stringHandle;
    if (!p)
        return nil;
    
    // Check the index against the length of the string list, then skip the length.
    if (index < 1 || index > *(SInt16 *)p)
        return nil;
    p += sizeof(SInt16);
    
    // Skip any strings that come before the one we are looking for.
    while (--index)
        p += 1 + *p;
    
    // Convert the one we found into an NSString.
    return [[[NSString alloc] initWithBytes:(p + 1) length:*p encoding:[NSString _web_encodingForResource:stringHandle]] autorelease];
}

- (BOOL)getPluginInfoFromResources
{
    SInt16 resRef = [self openResourceFile];
    if (resRef == -1)
        return NO;
    
    UseResFile(resRef);
    if (ResError() != noErr)
        return NO;

    NSString *MIME, *extensionsList, *description;
    NSArray *extensions;
    unsigned i;
    
    NSMutableDictionary *MIMEToExtensionsDictionary = [NSMutableDictionary dictionary];
    NSMutableDictionary *MIMEToDescriptionDictionary = [NSMutableDictionary dictionary];

    for (i=1; 1; i+=2) {
        MIME = [[self stringForStringListID:MIMEListStringStringNumber
                                   andIndex:i] lowercaseString];
        if (!MIME)
            break;

        extensionsList = [[self stringForStringListID:MIMEListStringStringNumber andIndex:i+1] lowercaseString];
        if (extensionsList) {
            extensions = [extensionsList componentsSeparatedByString:@","];
            [MIMEToExtensionsDictionary setObject:extensions forKey:MIME];
        } else
            // DRM and WMP claim MIMEs without extensions. Use a @"" extension in this case.
            [MIMEToExtensionsDictionary setObject:[NSArray arrayWithObject:@""] forKey:MIME];
        
        description = [self stringForStringListID:MIMEDescriptionStringNumber
                                         andIndex:[MIMEToExtensionsDictionary count]];
        if (description)
            [MIMEToDescriptionDictionary setObject:description forKey:MIME];
        else
            [MIMEToDescriptionDictionary setObject:@"" forKey:MIME];
    }

    [self setMIMEToDescriptionDictionary:MIMEToDescriptionDictionary];
    [self setMIMEToExtensionsDictionary:MIMEToExtensionsDictionary];

    NSString *filename = [self filename];
    
    description = [self stringForStringListID:PluginNameOrDescriptionStringNumber andIndex:1];
    if (!description)
        description = filename;
    [self setPluginDescription:description];
    
    
    NSString *theName = [self stringForStringListID:PluginNameOrDescriptionStringNumber andIndex:2];
    if (!theName)
        theName = filename;
    [self setName:theName];
    
    [self closeResourceFile:resRef];
    
    return YES;
}

- (BOOL)_initWithPath:(NSString *)pluginPath
{
    resourceRef = -1;
    
    OSType type = 0;

    if (bundle) {
        // Bundle
        CFBundleGetPackageInfo(cfBundle, &type, NULL);
#ifdef SUPPORT_CFM
        isBundle = YES;
#endif
    } else {
#ifdef SUPPORT_CFM
        // Single-file plug-in with resource fork
        type = [[[NSFileManager defaultManager] fileAttributesAtPath:path traverseLink:YES] fileHFSTypeCode];
        isBundle = NO;
        isCFM = YES;
#else
        return NO;
#endif
    }
    
    if (type != FOUR_CHAR_CODE('BRPL'))
        return NO;

    // Check if the executable is Mach-O or CFM.
    if (bundle) {
        NSFileHandle *executableFile = [NSFileHandle fileHandleForReadingAtPath:[bundle executablePath]];
        NSData *data = [executableFile readDataOfLength:512];
        [executableFile closeFile];
        // Check the length of the data before calling memcmp. We think this fixes 3782543.
        if (data == nil || [data length] < 8)
            return NO;
        BOOL hasCFMHeader = memcmp([data bytes], "Joy!peff", 8) == 0;
#ifdef SUPPORT_CFM
        isCFM = hasCFMHeader;
#else
        if (hasCFMHeader)
            return NO;
#endif

#if USE(PLUGIN_HOST_PROCESS)
        NSArray *archs = [bundle executableArchitectures];
        
        if ([archs containsObject:[NSNumber numberWithInteger:NSBundleExecutableArchitectureX86_64]])
            pluginHostArchitecture = CPU_TYPE_X86_64;
        else if ([archs containsObject:[NSNumber numberWithInteger:NSBundleExecutableArchitectureI386]])
            pluginHostArchitecture = CPU_TYPE_X86;
        else
            return NO;
#else
        if (![self isNativeLibraryData:data])
            return NO;
#endif
    }

    if (![self getPluginInfoFromPLists] && ![self getPluginInfoFromResources])
        return NO;
    
    return YES;
}

- (id)initWithPath:(NSString *)pluginPath
{
    if (!(self = [super initWithPath:pluginPath]))
        return nil;
    
    // Initializing a plugin package can cause it to be loaded.  If there was an error initializing the plugin package,
    // ensure that it is unloaded before deallocating it (WebBasePluginPackage requires & asserts this).
    if (![self _initWithPath:pluginPath]) {
        [self _unloadWithShutdown:YES];
        [self release];
        return nil;
    }
        
    return self;
}

- (WebExecutableType)executableType
{
#ifdef SUPPORT_CFM
    if (isCFM)
        return WebCFMExecutableType;
#endif
    return WebMachOExecutableType;
}

#if USE(PLUGIN_HOST_PROCESS)
- (cpu_type_t)pluginHostArchitecture
{
    return pluginHostArchitecture;
}

- (void)createPropertyListFile
{
    NetscapePluginHostManager::createPropertyListFile(self);
}

#endif

- (void)launchRealPlayer
{
    CFURLRef appURL = NULL;
    OSStatus error = LSFindApplicationForInfo(kLSUnknownCreator, (CFStringRef)RealPlayerAppIndentifier, NULL, NULL, &appURL);
    if (!error) {
        LSLaunchURLSpec URLSpec;
        bzero(&URLSpec, sizeof(URLSpec));
        URLSpec.launchFlags = kLSLaunchDefaults | kLSLaunchDontSwitch;
        URLSpec.appURL = appURL;
        LSOpenFromURLSpec(&URLSpec, NULL);
        CFRelease(appURL);
    }
}

- (void)_applyDjVuWorkaround
{
    if (!cfBundle)
        return;
    
    if ([(NSString *)CFBundleGetIdentifier(cfBundle) isEqualToString:@"com.lizardtech.NPDjVu"]) {
        // The DjVu plug-in will crash copying the vtable if it's too big so we cap it to 
        // what the plug-in expects here. 
        // size + version + 40 function pointers.
        browserFuncs.size = 2 + 2 + sizeof(void *) * 40;
    }
        
}

- (void)unload
{
    [self _unloadWithShutdown:YES];
}

- (BOOL)_tryLoad
{
    NP_GetEntryPointsFuncPtr NP_GetEntryPoints = NULL;
    NP_InitializeFuncPtr NP_Initialize = NULL;
    NPError npErr;

#ifdef SUPPORT_CFM
    MainFuncPtr pluginMainFunc = NULL;
#endif

#if !LOG_DISABLED
    CFAbsoluteTime start = CFAbsoluteTimeGetCurrent();
    CFAbsoluteTime currentTime;
    CFAbsoluteTime duration;
#endif
    LOG(Plugins, "%f Load timing started for: %@", start, [self name]);

    if (isLoaded)
        return YES;
    
#ifdef SUPPORT_CFM
    if (isBundle) {
#endif
        if (!CFBundleLoadExecutable(cfBundle))
            return NO;
#if !LOG_DISABLED
        currentTime = CFAbsoluteTimeGetCurrent();
        duration = currentTime - start;
#endif
        LOG(Plugins, "%f CFBundleLoadExecutable took %f seconds", currentTime, duration);
        isLoaded = YES;
        
#ifdef SUPPORT_CFM
        if (isCFM) {
            pluginMainFunc = (MainFuncPtr)CFBundleGetFunctionPointerForName(cfBundle, CFSTR("main") );
            if (!pluginMainFunc)
                return NO;
        } else {
#endif
            NP_Initialize = (NP_InitializeFuncPtr)CFBundleGetFunctionPointerForName(cfBundle, CFSTR("NP_Initialize"));
            NP_GetEntryPoints = (NP_GetEntryPointsFuncPtr)CFBundleGetFunctionPointerForName(cfBundle, CFSTR("NP_GetEntryPoints"));
            NP_Shutdown = (NPP_ShutdownProcPtr)CFBundleGetFunctionPointerForName(cfBundle, CFSTR("NP_Shutdown"));