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//
// GTMXcodeCorrectWhitespace.m
//
// Copyright 2007-2011 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not
// use this file except in compliance with the License. You may obtain a copy
// of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
// License for the specific language governing permissions and limitations under
// the License.
//
#import "GTMXcodePluginManager.h"
#import <Cocoa/Cocoa.h>
@interface GTMXcodeCorrectWhitespace : GTMXcodePlugin
- (void)cleanUpWhitespace:(id)sender;
@end
@implementation GTMXcodeCorrectWhitespace
// Perform a "subtraction of ranges". A - B. Not transitive.
static NSRange SubtractRange(NSRange a, NSRange b) {
NSRange newRange;
NSUInteger maxRangeA = NSMaxRange(a);
NSUInteger maxRangeB = NSMaxRange(b);
if (b.location == NSNotFound) {
// B is bogus
newRange = a;
} else if (maxRangeB <= a.location) {
// B is completely before A
newRange = NSMakeRange(a.location - b.length, a.length);
} else if (maxRangeA <= b.location) {
// B is completely after A
newRange = a;
} else if (b.location <= a.location && maxRangeB >= maxRangeA) {
// B subsumes A
newRange = NSMakeRange(b.location, 0);
} else if (a.location <= b.location && maxRangeA >= maxRangeB) {
// A subsumes B
newRange = NSMakeRange(a.location, a.length - b.length);
} else if (b.location <= a.location && maxRangeB <= maxRangeA) {
// B overlaps front edge of A
NSUInteger diff = maxRangeB - a.location;
newRange = NSMakeRange(a.location + diff, a.length - diff);
} else if (b.location <= maxRangeA && maxRangeB >= maxRangeA) {
// B overlaps back edge of A
NSUInteger diff = maxRangeA - b.location;
newRange = NSMakeRange(a.location, a.length - diff);
}
return newRange;
}
+ (void)load {
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
[GTMXcodePluginManager registerPluginClass:self];
[pool release];
}
- (void)applicationDidFinishLaunching:(NSNotification *)notification {
NSMenu *menu = [NSApp mainMenu];
NSArray *items = [menu itemArray];
for (NSMenuItem *item in items) {
// Added to Edit instead of Editor menu because the Editor menu is
// very dynamic in Xcode4.
if ([[item title] isEqualToString:@"Edit"]) {
NSMenu *editMenu = [item submenu];
[editMenu addItem:[NSMenuItem separatorItem]];
NSMenuItem *whiteSpaceItem
= [[NSMenuItem alloc] initWithTitle:@"Clean Up Whitespace"
action:@selector(cleanUpWhitespace:)
keyEquivalent:@""];
[whiteSpaceItem setKeyEquivalent:@"s"];
[whiteSpaceItem setKeyEquivalentModifierMask:(NSCommandKeyMask |
NSControlKeyMask |
NSAlternateKeyMask)];
[editMenu addItem:whiteSpaceItem];
[whiteSpaceItem setTarget:self];
}
}
}
- (void)cleanUpWhitespace:(id)sender {
NSWindow *nsKeyWindow = [[NSApplication sharedApplication] keyWindow];
NSResponder *responder = [nsKeyWindow firstResponder];
if ([responder conformsToProtocol:@protocol(NSTextInputClient)]) {
id client = responder;
NSRange selectedRange = [client selectedRange];
NSMutableAttributedString *src
= [[[client attributedString] mutableCopy] autorelease];
NSMutableString *text = [NSMutableString stringWithString:[src string]];
// Figure out the newlines in our file.
NSString *newlineString = @"\n";
if ([text rangeOfString:@"\r\n"].length > 0) {
newlineString = @"\r\n";
} else if ([text rangeOfString:@"\r"].length > 0) {
newlineString = @"\r";
}
NSUInteger newlineStringLength = [newlineString length];
NSCharacterSet *whiteSpace
= [NSCharacterSet characterSetWithCharactersInString:@" \t"];
NSMutableCharacterSet *nonWhiteSpace
= [[whiteSpace mutableCopy] autorelease];
[nonWhiteSpace invert];
NSRange oldRange = NSMakeRange(0, [text length]);
NSRange textRange = oldRange;
textRange.length -= 1;
while (textRange.length > 0) {
NSRange lineRange = [text rangeOfString:newlineString
options:NSBackwardsSearch
range:textRange];
if (lineRange.location == NSNotFound) {
lineRange.location = 0;
} else {
lineRange.location += newlineStringLength;
}
lineRange.length = textRange.length - lineRange.location;
textRange.length = lineRange.location;
if (textRange.length != 0) {
textRange.length -= newlineStringLength;
}
NSRange whiteRange = [text rangeOfCharacterFromSet:whiteSpace
options:NSBackwardsSearch
range:lineRange];
if (NSMaxRange(whiteRange) == NSMaxRange(lineRange)) {
NSRange nonWhiteRange = [text rangeOfCharacterFromSet:nonWhiteSpace
options:NSBackwardsSearch
range:lineRange];
NSRange deleteRange;
if (nonWhiteRange.location == NSNotFound) {
deleteRange.location = lineRange.location;
} else {
deleteRange.location = NSMaxRange(nonWhiteRange);
}
deleteRange.length = NSMaxRange(whiteRange) - deleteRange.location;
[text deleteCharactersInRange:deleteRange];
selectedRange = SubtractRange(selectedRange, deleteRange);
}
}
// If the file is missing a newline at the end, add it now.
if (![text hasSuffix:newlineString]) {
[text appendString:newlineString];
}
[client insertText:text replacementRange:oldRange];
if ([client respondsToSelector:@selector(setSelectedRange:)]) {
if (NSMaxRange(selectedRange) < [text length]) {
[client setSelectedRange:selectedRange];
[client scrollRangeToVisible:selectedRange];
}
}
}
}
@end
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