mirror of
https://github.com/darlinghq/darling-TextEdit.git
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185 lines
10 KiB
Objective-C
185 lines
10 KiB
Objective-C
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/*
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File: LinePanelController.m
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Abstract: "Select Line" panel controller for TextEdit.
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Enables selecting a single line, range of lines, from start or relative to current selected range.
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Version: 1.9
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Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple
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Inc. ("Apple") in consideration of your agreement to the following
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terms, and your use, installation, modification or redistribution of
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this Apple software constitutes acceptance of these terms. If you do
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not agree with these terms, please do not use, install, modify or
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redistribute this Apple software.
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In consideration of your agreement to abide by the following terms, and
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subject to these terms, Apple grants you a personal, non-exclusive
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license, under Apple's copyrights in this original Apple software (the
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"Apple Software"), to use, reproduce, modify and redistribute the Apple
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Software, with or without modifications, in source and/or binary forms;
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provided that if you redistribute the Apple Software in its entirety and
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without modifications, you must retain this notice and the following
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text and disclaimers in all such redistributions of the Apple Software.
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Neither the name, trademarks, service marks or logos of Apple Inc. may
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be used to endorse or promote products derived from the Apple Software
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without specific prior written permission from Apple. Except as
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expressly stated in this notice, no other rights or licenses, express or
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implied, are granted by Apple herein, including but not limited to any
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patent rights that may be infringed by your derivative works or by other
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works in which the Apple Software may be incorporated.
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The Apple Software is provided by Apple on an "AS IS" basis. APPLE
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MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
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THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS
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FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND
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OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.
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IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL
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OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION,
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MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED
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AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE),
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STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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Copyright (C) 2013 Apple Inc. All Rights Reserved.
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*/
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#import "LinePanelController.h"
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#import "TextEditErrors.h"
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#import "TextEditMisc.h"
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#import "Controller.h"
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@implementation LinePanelController
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- (id)init {
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return [super initWithWindowNibName:@"SelectLinePanel"];
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}
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- (void)windowDidLoad {
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NSWindow *window = [self window];
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[window setIdentifier:@"Line"];
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[window setRestorationClass:[self class]];
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[super windowDidLoad]; // It's documented to do nothing, but still a good idea to invoke...
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}
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/* Reopen the line panel when the app's persistent state is restored.
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*/
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+ (void)restoreWindowWithIdentifier:(NSString *)identifier state:(NSCoder *)state completionHandler:(void (^)(NSWindow *, NSError *))completionHandler {
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completionHandler([[(Controller *)[NSApp delegate] lineController] window], NULL);
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}
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/* A short and sweet example of use of NSScanner. Parses user's line specification, in the form of N, or N-M, or +N-M, or -N-M. Returns NO on error. Assumes none of the out parameters are NULL!
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*/
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- (BOOL)parseLineDescription:(NSString *)desc fromLineSpec:(NSInteger *)fromLine toLineSpec:(NSInteger *)toLine relative:(NSInteger *)relative {
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NSScanner *scanner = [NSScanner localizedScannerWithString:desc];
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*relative = [scanner scanString:@"+" intoString:NULL] ? 1 : ([scanner scanString:@"-" intoString:NULL] ? -1 : 0); // Look for "+" or "-"; set relative to 1 or -1, or 0 if neither found
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if (![scanner scanInteger:fromLine]) return NO; // Get the "from" spec
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if ([scanner scanString:@"-" intoString:NULL]) { // If "-" seen, look for the "to" spec
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if (![scanner scanInteger:toLine] || (*toLine < *fromLine)) return NO; // There needs to be a number that is not less than the "from" spec
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} else {
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*toLine = *fromLine; // If not a range, set the "to" spec to be the same as "from"
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}
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return [scanner isAtEnd] ? YES : NO; // If more stuff, error. Note that the scanner skips over white space
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}
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/* getRange:... gets the range to be selected in the specified textView using the indicated start, end, and relative values
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If relative = 0, then select from start of fromLine to end of toLine. The first line of the text is line 1.
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If relative != 0 then select from start of fromLine lines from current selected range to toLine lines from current selected range.
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toLine == fromLine means a one-line selection
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*/
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- (BOOL)getRange:(NSRange *)rangePtr inTextView:(NSTextView *)textView fromLineSpec:(NSInteger)fromLine toLineSpec:(NSInteger)toLine relative:(NSInteger)relative {
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NSRange newSelection = {0, 0}; // Character locations for the new selection
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NSString *textString = [textView string];
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if (relative != 0) { // Depending on relative direction, set the starting point to beginning of line at the start or end of the existing selected range
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NSRange curSel = [textView selectedRange];
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if (relative > 0) curSel.location = NSMaxRange(curSel) - ((curSel.length > 0) ? 1 : 0);
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[textString getLineStart:&newSelection.location end:NULL contentsEnd:NULL forRange:NSMakeRange(curSel.location, 0)];
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} else {
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if (fromLine == 0) return NO; // "0" is not a valid absolute line spec
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}
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// At this point, newSelection.location points at the beginning of the line we want to start from
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if (relative < 0) { // Backwards relative from that spot
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for (NSInteger cnt = 1; cnt < fromLine; cnt++) {
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if (newSelection.location == 0) return NO; // Invalid specification
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NSRange lineRange = [textString lineRangeForRange:NSMakeRange(newSelection.location - 1, 0)];
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newSelection.location = lineRange.location;
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}
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NSInteger end = newSelection.location; // This now marks the end of the range to be selected
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for (NSInteger cnt = fromLine; cnt <= toLine; cnt++) {
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if (newSelection.location == 0) return NO; // Invalid specification
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NSRange lineRange = [textString lineRangeForRange:NSMakeRange(newSelection.location - 1, 0)];
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newSelection.location = lineRange.location;
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}
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newSelection.length = end - newSelection.location;
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} else { // Forwards
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NSInteger textLength = [textString length];
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for (NSInteger cnt = (relative == 0) ? 1 : 0; cnt < fromLine; cnt++) { // If not a relative selection, we start counting from 1, since the first line is "line 1" to the user
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if (newSelection.location == textLength) return NO; // Invalid specification
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NSRange lineRange = [textString lineRangeForRange:NSMakeRange(newSelection.location, 0)];
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newSelection.location = NSMaxRange(lineRange);
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}
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NSInteger end = newSelection.location;
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for (NSInteger cnt = fromLine; cnt <= toLine; cnt++) { // If not relative, the end of the range is an absolute line number; otherwise it's relative
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if (end == textLength) return NO; // Invalid specification
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NSRange lineRange = [textString lineRangeForRange:NSMakeRange(end, 0)];
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end = NSMaxRange(lineRange);
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}
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newSelection.length = end - newSelection.location;
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}
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if (rangePtr) *rangePtr = newSelection;
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return YES;
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}
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/* selectLinesUsingDescription:error: selects the specified lines. On error it returns NO and sets *error if not NULL.
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*/
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- (BOOL)selectLinesUsingDescription:(NSString *)desc error:(NSError **)error {
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id firstResponder = [[NSApp mainWindow] firstResponder];
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if ([firstResponder isKindOfClass:[NSTextView class]]) {
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NSInteger fromLine, toLine, relative;
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if (![self parseLineDescription:desc fromLineSpec:&fromLine toLineSpec:&toLine relative:&relative]) {
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if (error) *error = [NSError errorWithDomain:TextEditErrorDomain code:TextEditInvalidLineSpecification userInfo:[NSDictionary dictionaryWithObjectsAndKeys:[NSString stringWithFormat:NSLocalizedStringFromTable(@"Invalid line specification \\U201c%@\\U201d.", @"LinePanel", @"Error message indicating invalid line specification for 'Select Line'"), truncatedString(desc, 100)], NSLocalizedDescriptionKey, NSLocalizedStringFromTable(@"Enter a line number or a range of line numbers to select.", @"LinePanel", @"Suggestion for correcting invalid line specification"), NSLocalizedRecoverySuggestionErrorKey, nil]];
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return NO;
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}
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NSRange range;
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if (![self getRange:&range inTextView:firstResponder fromLineSpec:fromLine toLineSpec:toLine relative:relative]) {
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if (error) *error = [NSError errorWithDomain:TextEditErrorDomain code:TextEditOutOfRangeLineSpecification userInfo:[NSDictionary dictionaryWithObjectsAndKeys:[NSString stringWithFormat:NSLocalizedStringFromTable(@"Invalid line specification \\U201c%@\\U201d.", @"LinePanel", @"Error message indicating invalid line specification for 'Select Line'"), truncatedString(desc, 100)], NSLocalizedDescriptionKey, NSLocalizedStringFromTable(@"Enter a line number or a range of line numbers to select.", @"LinePanel", @"Suggestion for correcting invalid line specification"), NSLocalizedRecoverySuggestionErrorKey, nil]];
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return NO;
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}
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[firstResponder setSelectedRange:range];
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[firstResponder scrollRangeToVisible:range];
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}
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return YES;
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}
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/* If the user enters a line specification and hits return, we want to order the panel out if successful. Hence this extra action method.
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*/
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- (IBAction)lineFieldChanged:(id)sender {
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NSError *error;
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if ([@"" isEqual:[sender stringValue]]) return; // Don't do anything on empty string
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if ([self selectLinesUsingDescription:[sender stringValue] error:&error]) {
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[[self window] orderOut:nil];
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} else {
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[[self window] presentError:error];
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[[self window] makeKeyAndOrderFront:nil];
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}
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}
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/* Default action for the "Select" button.
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*/
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- (IBAction)selectClicked:(id)sender {
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NSError *error;
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if ([@"" isEqual:[lineField stringValue]]) return; // Don't do anything on empty string
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if (![self selectLinesUsingDescription:[lineField stringValue] error:&error]) {
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[[self window] presentError:error];
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[[self window] makeKeyAndOrderFront:nil];
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}
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}
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@end
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