/*

 * 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.

 */

#import "WebHTMLRepresentation.h"

#import "DOMElementInternal.h"

#import "DOMNodeInternal.h"

#import "DOMRangeInternal.h"

#import "WebArchive.h"

#import "WebBasePluginPackage.h"

#import "WebDataSourceInternal.h"

#import "WebDocumentPrivate.h"

#import "WebFrameInternal.h"

#import "WebKitNSStringExtras.h"

#import "WebKitStatisticsPrivate.h"

#import "WebNSAttributedStringExtras.h"

#import "WebNSObjectExtras.h"

#import "WebTypesInternal.h"

#import "WebView.h"

#import <Foundation/NSURLResponse.h>

#import <WebCore/Document.h>

#import <WebCore/DocumentLoader.h>

#import <WebCore/Frame.h>

#import <WebCore/FrameLoader.h>

#import <WebCore/FrameLoaderClient.h>

#import <WebCore/HTMLFormControlElement.h>

#import <WebCore/HTMLFormElement.h>

#import <WebCore/HTMLInputElement.h>

#import <WebCore/HTMLNames.h>

#import <WebCore/MIMETypeRegistry.h>

#import <WebCore/Range.h>

#import <WebCore/TextResourceDecoder.h>

#import <WebKit/DOMHTMLInputElement.h>

#import <wtf/Assertions.h>

#import <wtf/StdLibExtras.h>

using namespace WebCore;

using namespace HTMLNames;

@interface WebHTMLRepresentationPrivate : NSObject {

@public

    WebDataSource *dataSource;

    BOOL hasSentResponseToPlugin;

    BOOL includedInWebKitStatistics;

    id <WebPluginManualLoader> manualLoader;

    NSView *pluginView;

}

@end

@implementation WebHTMLRepresentationPrivate

@end

@implementation WebHTMLRepresentation

static NSArray *stringArray(const HashSet<String>& set)

{

    NSMutableArray *array = [NSMutableArray arrayWithCapacity:set.size()];

    HashSet<String>::const_iterator end = set.end();

    for (HashSet<String>::const_iterator it = set.begin(); it != end; ++it)

        [array addObject:(NSString *)(*it)];

    return array;

}

static NSArray *concatenateArrays(NSArray *first, NSArray *second)

{

    NSMutableArray *result = [[first mutableCopy] autorelease];

    [result addObjectsFromArray:second];

    return result;

}

+ (NSArray *)supportedMIMETypes

{

    DEFINE_STATIC_LOCAL(RetainPtr<NSArray>, staticSupportedMIMETypes, (concatenateArrays([self supportedNonImageMIMETypes], [self supportedImageMIMETypes])));

    return staticSupportedMIMETypes.get();

}

+ (NSArray *)supportedNonImageMIMETypes

{

    DEFINE_STATIC_LOCAL(RetainPtr<NSArray>, staticSupportedNonImageMIMETypes, (stringArray(MIMETypeRegistry::getSupportedNonImageMIMETypes())));

    return staticSupportedNonImageMIMETypes.get();

}

+ (NSArray *)supportedImageMIMETypes

{

    DEFINE_STATIC_LOCAL(RetainPtr<NSArray>, staticSupportedImageMIMETypes, (stringArray(MIMETypeRegistry::getSupportedImageMIMETypes())));

    return staticSupportedImageMIMETypes.get();

}

- (id)init

{

    self = [super init];

    if (!self)

        return nil;

    _private = [[WebHTMLRepresentationPrivate alloc] init];

    return self;

}

- (void)dealloc

{

    if (_private && _private->includedInWebKitStatistics)

        --WebHTMLRepresentationCount;

    [_private release];

    [super dealloc];

}

- (void)finalize

{

    if (_private && _private->includedInWebKitStatistics)

        --WebHTMLRepresentationCount;

    [super finalize];

}

- (void)_redirectDataToManualLoader:(id<WebPluginManualLoader>)manualLoader forPluginView:(NSView *)pluginView

{

    _private->manualLoader = manualLoader;

    _private->pluginView = pluginView;

}

- (void)setDataSource:(WebDataSource *)dataSource

{

    _private->dataSource = dataSource;

    if (!_private->includedInWebKitStatistics && [[dataSource webFrame] _isIncludedInWebKitStatistics]) {

        _private->includedInWebKitStatistics = YES;

        ++WebHTMLRepresentationCount;

    }

}

- (BOOL)_isDisplayingWebArchive

{

    return [[_private->dataSource _responseMIMEType] _webkit_isCaseInsensitiveEqualToString:@"application/x-webarchive"];

}

- (void)receivedData:(NSData *)data withDataSource:(WebDataSource *)dataSource

{

    WebFrame *webFrame = [dataSource webFrame];

    if (webFrame) {

        if (!_private->pluginView)

            [webFrame _receivedData:data textEncodingName:[[_private->dataSource response] textEncodingName]];

        // If the document is a stand-alone media document, now is the right time to cancel the WebKit load

        Frame* coreFrame = core(webFrame);

        if (coreFrame->document() && coreFrame->document()->isMediaDocument())

            coreFrame->loader()->documentLoader()->cancelMainResourceLoad(coreFrame->loader()->client()->pluginWillHandleLoadError(coreFrame->loader()->documentLoader()->response()));

        if (_private->pluginView) {

            if (!_private->hasSentResponseToPlugin) {

                [_private->manualLoader pluginView:_private->pluginView receivedResponse:[dataSource response]];

                _private->hasSentResponseToPlugin = YES;

            }

            [_private->manualLoader pluginView:_private->pluginView receivedData:data];

        }

    }

}

- (void)receivedError:(NSError *)error withDataSource:(WebDataSource *)dataSource

{

    if (_private->pluginView) {

        [_private->manualLoader pluginView:_private->pluginView receivedError:error];

    }

}

- (void)finishedLoadingWithDataSource:(WebDataSource *)dataSource

{

    WebFrame *frame = [dataSource webFrame];

    if (_private->pluginView) {

        [_private->manualLoader pluginViewFinishedLoading:_private->pluginView];

        return;

    }

    if (frame) {

        if (![self _isDisplayingWebArchive]) {

            // Telling the frame we received some data and passing nil as the data is our

            // way to get work done that is normally done when the first bit of data is

            // received, even for the case of a document with no data (like about:blank).

            [frame _receivedData:nil textEncodingName:[[_private->dataSource response] textEncodingName]];

        }

        WebView *webView = [frame webView];

        if ([webView isEditable])

            core(frame)->applyEditingStyleToBodyElement();

    }

}

- (BOOL)canProvideDocumentSource

{

    return [[_private->dataSource webFrame] _canProvideDocumentSource];

}

- (BOOL)canSaveAsWebArchive

{

    return [[_private->dataSource webFrame] _canSaveAsWebArchive];

}

- (NSString *)documentSource

{

    if ([self _isDisplayingWebArchive]) {            

        SharedBuffer *parsedArchiveData = [_private->dataSource _documentLoader]->parsedArchiveData();

        NSData *nsData = parsedArchiveData ? parsedArchiveData->createNSData() : nil;

        NSString *result = [[NSString alloc] initWithData:nsData encoding:NSUTF8StringEncoding];

        [nsData release];

        return [result autorelease];

    }

    Frame* coreFrame = core([_private->dataSource webFrame]);

    if (!coreFrame)

        return nil;

    Document* document = coreFrame->document();

    if (!document)

        return nil;

    TextResourceDecoder* decoder = document->decoder();

    if (!decoder)

        return nil;

    NSData *data = [_private->dataSource data];

    if (!data)

        return nil;

    return decoder->encoding().decode(reinterpret_cast<const char*>([data bytes]), [data length]);

}

- (NSString *)title

{

    return nsStringNilIfEmpty([_private->dataSource _documentLoader]->title());

}

- (DOMDocument *)DOMDocument

{

    return [[_private->dataSource webFrame] DOMDocument];

}

- (NSAttributedString *)attributedText

{

    // FIXME: Implement

    return nil;

}

- (NSAttributedString *)attributedStringFrom:(DOMNode *)startNode startOffset:(int)startOffset to:(DOMNode *)endNode endOffset:(int)endOffset

{

    return [NSAttributedString _web_attributedStringFromRange:Range::create(core(startNode)->document(), core(startNode), startOffset, core(endNode), endOffset).get()];

}

static HTMLFormElement* formElementFromDOMElement(DOMElement *element)

{

    Element* node = core(element);

    return node && node->hasTagName(formTag) ? static_cast<HTMLFormElement*>(node) : 0;

}

- (DOMElement *)elementWithName:(NSString *)name inForm:(DOMElement *)form

{

    HTMLFormElement* formElement = formElementFromDOMElement(form);

    if (!formElement)

        return nil;

    const Vector<HTMLFormControlElement*>& elements = formElement->associatedElements();

    AtomicString targetName = name;

    for (unsigned i = 0; i < elements.size(); i++) {

        HTMLFormControlElement* elt = elements[i];

        if (elt->name() == targetName)

            return kit(elt);

    }

    return nil;

}

static HTMLInputElement* inputElementFromDOMElement(DOMElement* element)

{

    Element* node = core(element);

    return node && node->hasTagName(inputTag) ? static_cast<HTMLInputElement*>(node) : 0;

}

- (BOOL)elementDoesAutoComplete:(DOMElement *)element

{

    HTMLInputElement* inputElement = inputElementFromDOMElement(element);

    return inputElement

        && inputElement->isTextField()

        && inputElement->inputType() != HTMLInputElement::PASSWORD

        && inputElement->autoComplete();

}

- (BOOL)elementIsPassword:(DOMElement *)element

{

    HTMLInputElement* inputElement = inputElementFromDOMElement(element);

    return inputElement

        && inputElement->inputType() == HTMLInputElement::PASSWORD;

}

- (DOMElement *)formForElement:(DOMElement *)element

{

    HTMLInputElement* inputElement = inputElementFromDOMElement(element);

    return inputElement ? kit(inputElement->form()) : 0;

}

- (DOMElement *)currentForm

{

    return kit(core([_private->dataSource webFrame])->currentForm());

}

- (NSArray *)controlsInForm:(DOMElement *)form

{

    HTMLFormElement* formElement = formElementFromDOMElement(form);

    if (!formElement)

        return nil;

    NSMutableArray *results = nil;

    const Vector<HTMLFormControlElement*>& elements = formElement->associatedElements();

    for (unsigned i = 0; i < elements.size(); i++) {

        if (elements[i]->isEnumeratable()) { // Skip option elements, other duds

            DOMElement* de = kit(elements[i]);

            if (!results)

                results = [NSMutableArray arrayWithObject:de];

            else

                [results addObject:de];

        }

    }

    return results;

}

- (NSString *)searchForLabels:(NSArray *)labels beforeElement:(DOMElement *)element

{

    return [self searchForLabels:labels beforeElement:element resultDistance:0 resultIsInCellAbove:0];

}

- (NSString *)searchForLabels:(NSArray *)labels beforeElement:(DOMElement *)element resultDistance:(NSUInteger*)outDistance resultIsInCellAbove:(BOOL*)outIsInCellAbove

{

    size_t distance;

    bool isInCellAbove;

    NSString *result = core([_private->dataSource webFrame])->searchForLabelsBeforeElement(labels, core(element), &distance, &isInCellAbove);

    if (outDistance) {

        if (distance == notFound)

            *outDistance = NSNotFound;

        else

            *outDistance = distance;

    }

    if (outIsInCellAbove)

        *outIsInCellAbove = isInCellAbove;

    return result;

}

- (NSString *)matchLabels:(NSArray *)labels againstElement:(DOMElement *)element

{

    return core([_private->dataSource webFrame])->matchLabelsAgainstElement(labels, core(element));

}

@end