/*

 * Copyright (C) 2005 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. 

 * 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 "WebSearchableTextView.h"

#import "WebDocumentPrivate.h"

#import "WebTypesInternal.h"

@interface NSString (_Web_StringTextFinding)

- (NSRange)findString:(NSString *)string selectedRange:(NSRange)selectedRange options:(unsigned)mask wrap:(BOOL)wrapFlag;

@end

@implementation WebSearchableTextView

- (BOOL)searchFor: (NSString *)string direction: (BOOL)forward caseSensitive: (BOOL)caseFlag wrap: (BOOL)wrapFlag;

{

    if (![string length])

        return NO;

    BOOL lastFindWasSuccessful = NO;

    NSString *textContents = [self string];

    unsigned textLength;

    if (textContents && (textLength = [textContents length])) {

        NSRange range;

        unsigned options = 0;

        if (!forward)

            options |= NSBackwardsSearch;

        if (!caseFlag)

            options |= NSCaseInsensitiveSearch;

        range = [textContents findString:string selectedRange:[self selectedRange] options:options wrap:wrapFlag];

        if (range.length) {

            [self setSelectedRange:range];

            [self scrollRangeToVisible:range];

            lastFindWasSuccessful = YES;

        }

    }

    return lastFindWasSuccessful;

}

- (void)copy:(id)sender

{

    if ([self isRichText]) {

        [super copy:sender];

    }else{

        //Convert CRLF to LF to workaround: 3105538 - Carbon doesn't convert text with CRLF to LF

        NSMutableString *string = [[[self string] substringWithRange:[self selectedRange]] mutableCopy];

        [string replaceOccurrencesOfString:@"\r\n" withString:@"\n" options:0 range:NSMakeRange(0, [string length])];

        NSPasteboard *pasteboard = [NSPasteboard generalPasteboard];

        [pasteboard declareTypes:[NSArray arrayWithObject:NSStringPboardType] owner:self];

        [pasteboard setString:string forType:NSStringPboardType];

    }

}

- (NSRect)selectionRect

{

    // Note that this method would work for any NSTextView; some day we might want to use it

    // for an NSTextView that isn't a WebTextView.

    NSRect result = NSZeroRect;

    // iterate over multiple selected ranges

    NSEnumerator *rangeEnumerator = [[self selectedRanges] objectEnumerator];

    NSValue *rangeAsValue;

    while ((rangeAsValue = [rangeEnumerator nextObject]) != nil) {

        NSRange range = [rangeAsValue rangeValue];

        NSUInteger rectCount;

        NSRectArray rectArray = [[self layoutManager] rectArrayForCharacterRange:range 

                                                    withinSelectedCharacterRange:range 

                                                                 inTextContainer:[self textContainer] 

                                                                       rectCount:&rectCount];

        unsigned i;

        // iterate over multiple rects in each selected range

        for (i = 0; i < rectCount; ++i) {

            NSRect rect = rectArray[i];

            if (NSEqualRects(result, NSZeroRect)) {

                result = rect;

            } else {

                result = NSUnionRect(result, rect);

            }

        }

    }

    return result;

}

- (NSImage *)selectionImageForcingBlackText:(BOOL)forceBlackText

{

    // This is here to complete the <WebDocumentSelection> protocol, but it was introduced after this

    // class was deprecated so there's no implementation.

    return nil;

}

- (NSImage *)selectionImageForcingWhiteText:(BOOL)forceWhiteText

{

    // This is here to complete the <WebDocumentSelection> protocol, but it was introduced after this

    // class was deprecated so there's no implementation.

    return nil;

}

- (NSRect)selectionImageRect

{

    // This is here to complete the <WebDocumentSelection> protocol, but it was introduced after this

    // class was deprecated so there's no implementation.

    return NSZeroRect;

}

- (NSArray *)selectionTextRects

{

    // This is here to complete the <WebDocumentSelection> protocol, but it was introduced after this

    // class was deprecated so there's no implementation.

    return nil;

}

- (NSView *)selectionView

{

    return self;

}

- (NSArray *)pasteboardTypesForSelection

{

    return [self writablePasteboardTypes];

}

- (void)writeSelectionWithPasteboardTypes:(NSArray *)types toPasteboard:(NSPasteboard *)pasteboard

{

    [self writeSelectionToPasteboard:pasteboard types:types];

}

- (BOOL)supportsTextEncoding

{

    return YES;

}

- (NSString *)string

{

    return [super string];

}

- (NSAttributedString *)attributedString

{

    return [self attributedSubstringFromRange:NSMakeRange(0, [[self string] length])];

}

- (NSString *)selectedString

{

    return [[self string] substringWithRange:[self selectedRange]];

}

- (NSAttributedString *)selectedAttributedString

{

    return [self attributedSubstringFromRange:[self selectedRange]];

}

- (void)selectAll

{

    [self setSelectedRange:NSMakeRange(0, [[self string] length])];

}

- (void)deselectAll

{

    [self setSelectedRange:NSMakeRange(0,0)];

}

@end

@implementation NSString (_Web_StringTextFinding)

- (NSRange)findString:(NSString *)string selectedRange:(NSRange)selectedRange options:(unsigned)options wrap:(BOOL)wrap

{

    BOOL forwards = (options & NSBackwardsSearch) == 0;

    unsigned length = [self length];

    NSRange searchRange, range;

    // Our search algorithm, used in WebCore also, is to search in the selection first. If the found text is the

    // entire selection, then we search again from just past the selection.

    if (forwards) {

        // FIXME: If selectedRange has length of 0, we ignore it, which is appropriate for non-editable text (since

        // a zero-length selection in non-editable is invisible). We might want to change this someday to only ignore the

        // selection if its location is NSNotFound when the text is editable (and similarly for the backwards case).

        searchRange.location = selectedRange.length > 0 ? selectedRange.location : 0;

        searchRange.length = length - searchRange.location;

        range = [self rangeOfString:string options:options range:searchRange];

        // If found range matches (non-empty) selection, search again from just past selection

        if (range.location != NSNotFound && NSEqualRanges(range, selectedRange)) {

            searchRange.location = NSMaxRange(selectedRange);

            searchRange.length = length - searchRange.location;

            range = [self rangeOfString:string options:options range:searchRange];

        }

        // If not found, search again from the beginning. Make search range large enough that

        // we'll find a match even if it partially overlapped the existing selection (including the

        // case where it exactly matches the existing selection).

        if ((range.length == 0) && wrap) {

            searchRange.location = 0;

            searchRange.length = selectedRange.location + selectedRange.length + [string length];

            if (searchRange.length > length) {

                searchRange.length = length;

            }

            range = [self rangeOfString:string options:options range:searchRange];

        }

    } else {

        searchRange.location = 0;

        searchRange.length = selectedRange.length > 0 ? NSMaxRange(selectedRange) : length;

        range = [self rangeOfString:string options:options range:searchRange];

        // If found range matches (non-empty) selection, search again from just before selection

        if (range.location != NSNotFound && NSEqualRanges(range, selectedRange)) {

            searchRange.location = 0;

            searchRange.length = selectedRange.location;

            range = [self rangeOfString:string options:options range:searchRange];

        }

        // If not found, search again from the end. Make search range large enough that

        // we'll find a match even if it partially overlapped the existing selection (including the

        // case where it exactly matches the existing selection).

        if ((range.length == 0) && wrap) {

            unsigned stringLength = [string length];

            if (selectedRange.location > stringLength) {

                searchRange.location = selectedRange.location - stringLength;

            } else {

                searchRange.location = 0;

            }

            searchRange.length = length - searchRange.location;

            range = [self rangeOfString:string options:options range:searchRange];

        }

}

return range;

}

@end