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MPDocument.m
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//
// MPDocument.m
// MacDown
//
// Created by Tzu-ping Chung on 6/06/2014.
// Copyright (c) 2014 Tzu-ping Chung . All rights reserved.
//
#import "MPDocument.h"
#import <WebKit/WebKit.h>
#import <JJPluralForm/JJPluralForm.h>
#import <hoedown/html.h>
#import "hoedown_html_patch.h"
#import "HGMarkdownHighlighter.h"
#import "MPUtilities.h"
#import "MPAutosaving.h"
#import "NSColor+HTML.h"
#import "NSDocumentController+Document.h"
#import "NSPasteboard+Types.h"
#import "NSString+Lookup.h"
#import "NSTextView+Autocomplete.h"
#import "DOMNode+Text.h"
#import "MPPreferences.h"
#import "MPDocumentSplitView.h"
#import "MPEditorView.h"
#import "MPRenderer.h"
#import "MPPreferencesViewController.h"
#import "MPEditorPreferencesViewController.h"
#import "MPExportPanelAccessoryViewController.h"
#import "MPMathJaxListener.h"
#import "WebView+WebViewPrivateHeaders.h"
#import "MPToolbarController.h"
#import <JavaScriptCore/JavaScriptCore.h>
static NSString * const kMPDefaultAutosaveName = @"Untitled";
NS_INLINE NSString *MPEditorPreferenceKeyWithValueKey(NSString *key)
{
if (!key.length)
return @"editor";
NSString *first = [[key substringToIndex:1] uppercaseString];
NSString *rest = [key substringFromIndex:1];
return [NSString stringWithFormat:@"editor%@%@", first, rest];
}
NS_INLINE NSDictionary *MPEditorKeysToObserve()
{
static NSDictionary *keys = nil;
static dispatch_once_t token;
dispatch_once(&token, ^{
keys = @{@"automaticDashSubstitutionEnabled": @NO,
@"automaticDataDetectionEnabled": @NO,
@"automaticQuoteSubstitutionEnabled": @NO,
@"automaticSpellingCorrectionEnabled": @NO,
@"automaticTextReplacementEnabled": @NO,
@"continuousSpellCheckingEnabled": @NO,
@"enabledTextCheckingTypes": @(NSTextCheckingAllTypes),
@"grammarCheckingEnabled": @NO};
});
return keys;
}
NS_INLINE NSSet *MPEditorPreferencesToObserve()
{
static NSSet *keys = nil;
static dispatch_once_t token;
dispatch_once(&token, ^{
keys = [NSSet setWithObjects:
@"editorBaseFontInfo", @"extensionFootnotes",
@"editorHorizontalInset", @"editorVerticalInset",
@"editorWidthLimited", @"editorMaximumWidth", @"editorLineSpacing",
@"editorOnRight", @"editorStyleName", @"editorShowWordCount",
@"editorScrollsPastEnd", nil
];
});
return keys;
}
NS_INLINE NSString *MPRectStringForAutosaveName(NSString *name)
{
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
NSString *key = [NSString stringWithFormat:@"NSWindow Frame %@", name];
NSString *rectString = [defaults objectForKey:key];
return rectString;
}
NS_INLINE NSColor *MPGetWebViewBackgroundColor(WebView *webview)
{
DOMDocument *doc = webview.mainFrameDocument;
DOMNodeList *nodes = [doc getElementsByTagName:@"body"];
if (!nodes.length)
return nil;
id bodyNode = [nodes item:0];
DOMCSSStyleDeclaration *style = [doc getComputedStyle:bodyNode
pseudoElement:nil];
return [NSColor colorWithHTMLName:[style backgroundColor]];
}
@implementation NSURL (Convert)
- (NSString *)absoluteBaseURLString
{
// Remove fragment (#anchor) and query string.
NSString *base = self.absoluteString;
base = [base componentsSeparatedByString:@"?"].firstObject;
base = [base componentsSeparatedByString:@"#"].firstObject;
return base;
}
@end
@implementation WebView (Shortcut)
- (NSScrollView *)enclosingScrollView
{
return self.mainFrame.frameView.documentView.enclosingScrollView;
}
@end
@implementation MPPreferences (Hoedown)
- (int)extensionFlags
{
int flags = 0;
if (self.extensionAutolink)
flags |= HOEDOWN_EXT_AUTOLINK;
if (self.extensionFencedCode)
flags |= HOEDOWN_EXT_FENCED_CODE;
if (self.extensionFootnotes)
flags |= HOEDOWN_EXT_FOOTNOTES;
if (self.extensionHighlight)
flags |= HOEDOWN_EXT_HIGHLIGHT;
if (!self.extensionIntraEmphasis)
flags |= HOEDOWN_EXT_NO_INTRA_EMPHASIS;
if (self.extensionQuote)
flags |= HOEDOWN_EXT_QUOTE;
if (self.extensionStrikethough)
flags |= HOEDOWN_EXT_STRIKETHROUGH;
if (self.extensionSuperscript)
flags |= HOEDOWN_EXT_SUPERSCRIPT;
if (self.extensionTables)
flags |= HOEDOWN_EXT_TABLES;
if (self.extensionUnderline)
flags |= HOEDOWN_EXT_UNDERLINE;
if (self.htmlMathJax)
flags |= HOEDOWN_EXT_MATH;
if (self.htmlMathJaxInlineDollar)
flags |= HOEDOWN_EXT_MATH_EXPLICIT;
return flags;
}
- (int)rendererFlags
{
int flags = 0;
if (self.htmlTaskList)
flags |= HOEDOWN_HTML_USE_TASK_LIST;
if (self.htmlLineNumbers)
flags |= HOEDOWN_HTML_BLOCKCODE_LINE_NUMBERS;
if (self.htmlHardWrap)
flags |= HOEDOWN_HTML_HARD_WRAP;
if (self.htmlCodeBlockAccessory == MPCodeBlockAccessoryCustom)
flags |= HOEDOWN_HTML_BLOCKCODE_INFORMATION;
return flags;
}
@end
@interface MPDocument ()
<NSSplitViewDelegate, NSTextViewDelegate,
#if __MAC_OS_X_VERSION_MAX_ALLOWED >= 101100
WebEditingDelegate, WebFrameLoadDelegate, WebPolicyDelegate, WebResourceLoadDelegate,
#endif
MPAutosaving, MPRendererDataSource, MPRendererDelegate>
typedef NS_ENUM(NSUInteger, MPWordCountType) {
MPWordCountTypeWord,
MPWordCountTypeCharacter,
MPWordCountTypeCharacterNoSpaces,
};
@property (weak) IBOutlet NSToolbar *toolbar;
@property (weak) IBOutlet MPDocumentSplitView *splitView;
@property (weak) IBOutlet NSView *editorContainer;
@property (unsafe_unretained) IBOutlet MPEditorView *editor;
@property (weak) IBOutlet NSLayoutConstraint *editorPaddingBottom;
@property (weak) IBOutlet WebView *preview;
@property (weak) IBOutlet NSPopUpButton *wordCountWidget;
@property (strong) IBOutlet MPToolbarController *toolbarController;
@property (copy, nonatomic) NSString *autosaveName;
@property (strong) HGMarkdownHighlighter *highlighter;
@property (strong) MPRenderer *renderer;
@property CGFloat previousSplitRatio;
@property BOOL manualRender;
@property BOOL copying;
@property BOOL printing;
@property BOOL shouldHandleBoundsChange;
@property BOOL isPreviewReady;
@property (strong) NSURL *currentBaseUrl;
@property CGFloat lastPreviewScrollTop;
@property (nonatomic, readonly) BOOL needsHtml;
@property (nonatomic) NSUInteger totalWords;
@property (nonatomic) NSUInteger totalCharacters;
@property (nonatomic) NSUInteger totalCharactersNoSpaces;
@property (strong) NSMenuItem *wordsMenuItem;
@property (strong) NSMenuItem *charMenuItem;
@property (strong) NSMenuItem *charNoSpacesMenuItem;
@property (nonatomic) BOOL needsToUnregister;
@property (nonatomic) BOOL alreadyRenderingInWeb;
@property (nonatomic) BOOL renderToWebPending;
@property (strong) NSArray<NSNumber *> *webViewHeaderLocations;
@property (strong) NSArray<NSNumber *> *editorHeaderLocations;
@property (nonatomic) BOOL inLiveScroll;
// Store file content in initializer until nib is loaded.
@property (copy) NSString *loadedString;
- (void)scaleWebview;
- (void)syncScrollers;
-(void) updateHeaderLocations;
@end
static void (^MPGetPreviewLoadingCompletionHandler(MPDocument *doc))()
{
__weak MPDocument *weakObj = doc;
return ^{
WebView *webView = weakObj.preview;
NSWindow *window = webView.window;
@synchronized(window) {
if (window.isFlushWindowDisabled)
[window enableFlushWindow];
}
[weakObj scaleWebview];
if (weakObj.preferences.editorSyncScrolling)
{
[weakObj updateHeaderLocations];
[weakObj syncScrollers];
}
else
{
NSClipView *contentView = webView.enclosingScrollView.contentView;
NSRect bounds = contentView.bounds;
bounds.origin.y = weakObj.lastPreviewScrollTop;
contentView.bounds = bounds;
}
};
}
@implementation MPDocument
#pragma mark - Accessor
- (MPPreferences *)preferences
{
return [MPPreferences sharedInstance];
}
- (NSString *)markdown
{
return self.editor.string;
}
- (void)setMarkdown:(NSString *)markdown
{
self.editor.string = markdown;
}
- (NSString *)html
{
return self.renderer.currentHtml;
}
- (BOOL)toolbarVisible
{
return self.windowForSheet.toolbar.visible;
}
- (BOOL)previewVisible
{
return (self.preview.frame.size.width != 0.0);
}
- (BOOL)editorVisible
{
return (self.editorContainer.frame.size.width != 0.0);
}
- (BOOL)needsHtml
{
if (self.preferences.markdownManualRender)
return NO;
return (self.previewVisible || self.preferences.editorShowWordCount);
}
- (void)setTotalWords:(NSUInteger)value
{
_totalWords = value;
NSString *key = NSLocalizedString(@"WORDS_PLURAL_STRING", @"");
NSInteger rule = kJJPluralFormRule.integerValue;
self.wordsMenuItem.title =
[JJPluralForm pluralStringForNumber:value withPluralForms:key
usingPluralRule:rule localizeNumeral:NO];
}
- (void)setTotalCharacters:(NSUInteger)value
{
_totalCharacters = value;
NSString *key = NSLocalizedString(@"CHARACTERS_PLURAL_STRING", @"");
NSInteger rule = kJJPluralFormRule.integerValue;
self.charMenuItem.title =
[JJPluralForm pluralStringForNumber:value withPluralForms:key
usingPluralRule:rule localizeNumeral:NO];
}
- (void)setTotalCharactersNoSpaces:(NSUInteger)value
{
_totalCharactersNoSpaces = value;
NSString *key = NSLocalizedString(@"CHARACTERS_NO_SPACES_PLURAL_STRING",
@"");
NSInteger rule = kJJPluralFormRule.integerValue;
self.charNoSpacesMenuItem.title =
[JJPluralForm pluralStringForNumber:value withPluralForms:key
usingPluralRule:rule localizeNumeral:NO];
}
- (void)setAutosaveName:(NSString *)autosaveName
{
_autosaveName = autosaveName;
self.splitView.autosaveName = autosaveName;
}
#pragma mark - Override
- (instancetype)init
{
self = [super init];
if (!self)
return nil;
self.isPreviewReady = NO;
self.shouldHandleBoundsChange = YES;
self.previousSplitRatio = -1.0;
return self;
}
- (NSString *)windowNibName
{
return @"MPDocument";
}
- (void)windowControllerDidLoadNib:(NSWindowController *)controller
{
[super windowControllerDidLoadNib:controller];
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
// All files use their absolute path to keep their window states.
NSString *autosaveName = kMPDefaultAutosaveName;
if (self.fileURL)
autosaveName = self.fileURL.absoluteString;
controller.window.frameAutosaveName = autosaveName;
self.autosaveName = autosaveName;
// Perform initial resizing manually because for some reason untitled
// documents do not pick up the autosaved frame automatically in 10.10.
NSString *rectString = MPRectStringForAutosaveName(autosaveName);
if (!rectString)
rectString = MPRectStringForAutosaveName(kMPDefaultAutosaveName);
if (rectString)
[controller.window setFrameFromString:rectString];
self.highlighter =
[[HGMarkdownHighlighter alloc] initWithTextView:self.editor
waitInterval:0.0];
self.renderer = [[MPRenderer alloc] init];
self.renderer.dataSource = self;
self.renderer.delegate = self;
for (NSString *key in MPEditorPreferencesToObserve())
{
[defaults addObserver:self forKeyPath:key
options:NSKeyValueObservingOptionNew context:NULL];
}
for (NSString *key in MPEditorKeysToObserve())
{
[self.editor addObserver:self forKeyPath:key
options:NSKeyValueObservingOptionNew context:NULL];
}
self.editor.postsFrameChangedNotifications = YES;
self.preview.frameLoadDelegate = self;
self.preview.policyDelegate = self;
self.preview.editingDelegate = self;
self.preview.resourceLoadDelegate = self;
NSNotificationCenter *center = [NSNotificationCenter defaultCenter];
[center addObserver:self selector:@selector(editorTextDidChange:)
name:NSTextDidChangeNotification object:self.editor];
[center addObserver:self selector:@selector(userDefaultsDidChange:)
name:NSUserDefaultsDidChangeNotification
object:[NSUserDefaults standardUserDefaults]];
[center addObserver:self selector:@selector(editorBoundsDidChange:)
name:NSViewBoundsDidChangeNotification
object:self.editor.enclosingScrollView.contentView];
[center addObserver:self selector:@selector(editorFrameDidChange:)
name:NSViewFrameDidChangeNotification object:self.editor];
[center addObserver:self selector:@selector(didRequestEditorReload:)
name:MPDidRequestEditorSetupNotification object:nil];
[center addObserver:self selector:@selector(didRequestPreviewReload:)
name:MPDidRequestPreviewRenderNotification object:nil];
[center addObserver:self selector:@selector(willStartLiveScroll:)
name:NSScrollViewWillStartLiveScrollNotification
object:self.editor.enclosingScrollView];
[center addObserver:self selector:@selector(didEndLiveScroll:)
name:NSScrollViewDidEndLiveScrollNotification
object:self.editor.enclosingScrollView];
if (kCFCoreFoundationVersionNumber >= kCFCoreFoundationVersionNumber10_9)
{
[center addObserver:self selector:@selector(previewDidLiveScroll:)
name:NSScrollViewDidEndLiveScrollNotification
object:self.preview.enclosingScrollView];
}
self.needsToUnregister = YES;
self.wordsMenuItem = [[NSMenuItem alloc] initWithTitle:@"" action:NULL
keyEquivalent:@""];
self.charMenuItem = [[NSMenuItem alloc] initWithTitle:@"" action:NULL
keyEquivalent:@""];
self.charNoSpacesMenuItem = [[NSMenuItem alloc] initWithTitle:@""
action:NULL
keyEquivalent:@""];
NSPopUpButton *wordCountWidget = self.wordCountWidget;
[wordCountWidget removeAllItems];
[wordCountWidget.menu addItem:self.wordsMenuItem];
[wordCountWidget.menu addItem:self.charMenuItem];
[wordCountWidget.menu addItem:self.charNoSpacesMenuItem];
[wordCountWidget selectItemAtIndex:self.preferences.editorWordCountType];
wordCountWidget.alphaValue = 0.9;
wordCountWidget.hidden = !self.preferences.editorShowWordCount;
wordCountWidget.enabled = NO;
// These needs to be queued until after the window is shown, so that editor
// can have the correct dimention for size-limiting and stuff. See
// https://github.com/uranusjr/macdown/issues/236
[[NSOperationQueue mainQueue] addOperationWithBlock:^{
[self setupEditor:nil];
[self redrawDivider];
[self reloadFromLoadedString];
}];
}
- (void)reloadFromLoadedString
{
if (self.loadedString && self.editor && self.renderer && self.highlighter)
{
self.editor.string = self.loadedString;
self.loadedString = nil;
[self.renderer parseAndRenderNow];
[self.highlighter parseAndHighlightNow];
}
}
- (void)close
{
if (self.needsToUnregister)
{
// Close can be called multiple times, but this can only be done once.
// http://www.cocoabuilder.com/archive/cocoa/240166-nsdocument-close-method-calls-itself.html
self.needsToUnregister = NO;
// Need to cleanup these so that callbacks won't crash the app.
[self.highlighter deactivate];
self.highlighter.targetTextView = nil;
self.highlighter = nil;
self.renderer = nil;
self.preview.frameLoadDelegate = nil;
self.preview.policyDelegate = nil;
[[NSNotificationCenter defaultCenter] removeObserver:self];
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
for (NSString *key in MPEditorPreferencesToObserve())
[defaults removeObserver:self forKeyPath:key];
for (NSString *key in MPEditorKeysToObserve())
[self.editor removeObserver:self forKeyPath:key];
}
[super close];
}
+ (BOOL)autosavesInPlace
{
return YES;
}
+ (NSArray *)writableTypes
{
return @[@"net.daringfireball.markdown"];
}
- (BOOL)isDocumentEdited
{
// Prevent save dialog on an unnamed, empty document. The file will still
// show as modified (because it is), but no save dialog will be presented
// when the user closes it.
if (!self.presentedItemURL && !self.editor.string.length)
return NO;
return [super isDocumentEdited];
}
- (BOOL)writeToURL:(NSURL *)url ofType:(NSString *)typeName
error:(NSError *__autoreleasing *)outError
{
if (self.preferences.editorEnsuresNewlineAtEndOfFile)
{
NSCharacterSet *newline = [NSCharacterSet newlineCharacterSet];
NSString *text = self.editor.string;
NSUInteger end = text.length;
if (end && ![newline characterIsMember:[text characterAtIndex:end - 1]])
{
NSRange selection = self.editor.selectedRange;
[self.editor insertText:@"\n" replacementRange:NSMakeRange(end, 0)];
self.editor.selectedRange = selection;
}
}
return [super writeToURL:url ofType:typeName error:outError];
}
- (NSData *)dataOfType:(NSString *)typeName error:(NSError **)outError
{
return [self.editor.string dataUsingEncoding:NSUTF8StringEncoding];
}
- (BOOL)readFromData:(NSData *)data ofType:(NSString *)typeName
error:(NSError **)outError
{
NSString *content = [[NSString alloc] initWithData:data
encoding:NSUTF8StringEncoding];
if (!content)
return NO;
self.loadedString = content;
[self reloadFromLoadedString];
return YES;
}
- (BOOL)prepareSavePanel:(NSSavePanel *)savePanel
{
savePanel.extensionHidden = NO;
if (self.fileURL && self.fileURL.isFileURL)
{
NSString *path = self.fileURL.path;
// Use path of parent directory if this is a file. Otherwise this is it.
BOOL isDir = NO;
BOOL exists = [[NSFileManager defaultManager] fileExistsAtPath:path
isDirectory:&isDir];
if (!exists || !isDir)
path = [path stringByDeletingLastPathComponent];
savePanel.directoryURL = [NSURL fileURLWithPath:path];
}
else
{
// Suggest a file name for new documents.
NSString *fileName = self.presumedFileName;
if (fileName && ![fileName hasExtension:@"md"])
{
fileName = [fileName stringByAppendingPathExtension:@"md"];
savePanel.nameFieldStringValue = fileName;
}
}
// Get supported extensions from plist
static NSMutableArray *supportedExtensions = nil;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
supportedExtensions = [NSMutableArray array];
NSDictionary *infoDict = [NSBundle mainBundle].infoDictionary;
for (NSDictionary *docType in infoDict[@"CFBundleDocumentTypes"])
{
NSArray *exts = docType[@"CFBundleTypeExtensions"];
if (exts.count)
{
[supportedExtensions addObjectsFromArray:exts];
}
}
});
savePanel.allowedFileTypes = supportedExtensions;
savePanel.allowsOtherFileTypes = YES; // Allow all extensions.
return [super prepareSavePanel:savePanel];
}
- (NSPrintInfo *)printInfo
{
NSPrintInfo *info = [super printInfo];
if (!info)
info = [[NSPrintInfo sharedPrintInfo] copy];
info.horizontalPagination = NSAutoPagination;
info.verticalPagination = NSAutoPagination;
info.verticallyCentered = NO;
info.topMargin = 50.0;
info.leftMargin = 0.0;
info.rightMargin = 0.0;
info.bottomMargin = 50.0;
return info;
}
- (NSPrintOperation *)printOperationWithSettings:(NSDictionary *)printSettings
error:(NSError *__autoreleasing *)e
{
NSPrintInfo *info = [self.printInfo copy];
[info.dictionary addEntriesFromDictionary:printSettings];
WebFrameView *view = self.preview.mainFrame.frameView;
NSPrintOperation *op = [view printOperationWithPrintInfo:info];
return op;
}
- (void)printDocumentWithSettings:(NSDictionary *)printSettings
showPrintPanel:(BOOL)showPrintPanel delegate:(id)delegate
didPrintSelector:(SEL)selector contextInfo:(void *)contextInfo
{
self.printing = YES;
NSInvocation *invocation = nil;
if (delegate && selector)
{
NSMethodSignature *signature =
[NSMethodSignature methodSignatureForSelector:selector];
invocation = [NSInvocation invocationWithMethodSignature:signature];
invocation.target = delegate;
if (contextInfo)
[invocation setArgument:&contextInfo atIndex:2];
}
[super printDocumentWithSettings:printSettings
showPrintPanel:showPrintPanel delegate:self
didPrintSelector:@selector(document:didPrint:context:)
contextInfo:(void *)invocation];
}
- (BOOL)validateUserInterfaceItem:(id<NSValidatedUserInterfaceItem>)item
{
BOOL result = [super validateUserInterfaceItem:item];
SEL action = item.action;
if (action == @selector(toggleToolbar:))
{
NSMenuItem *it = ((NSMenuItem *)item);
it.title = self.toolbarVisible ?
NSLocalizedString(@"Hide Toolbar",
@"Toggle reveal toolbar") :
NSLocalizedString(@"Show Toolbar",
@"Toggle reveal toolbar");
}
else if (action == @selector(togglePreviewPane:))
{
NSMenuItem *it = ((NSMenuItem *)item);
it.hidden = (!self.previewVisible && self.previousSplitRatio < 0.0);
it.title = self.previewVisible ?
NSLocalizedString(@"Hide Preview Pane",
@"Toggle preview pane menu item") :
NSLocalizedString(@"Restore Preview Pane",
@"Toggle preview pane menu item");
}
else if (action == @selector(toggleEditorPane:))
{
NSMenuItem *it = (NSMenuItem*)item;
it.title = self.editorVisible ?
NSLocalizedString(@"Hide Editor Pane",
@"Toggle editor pane menu item") :
NSLocalizedString(@"Restore Editor Pane",
@"Toggle editor pane menu item");
}
return result;
}
#pragma mark - NSSplitViewDelegate
- (void)splitViewDidResizeSubviews:(NSNotification *)notification
{
[self redrawDivider];
self.editor.editable = self.editorVisible;
}
#pragma mark - NSTextViewDelegate
- (BOOL)textView:(NSTextView *)textView doCommandBySelector:(SEL)commandSelector
{
if (commandSelector == @selector(insertTab:))
return ![self textViewShouldInsertTab:textView];
else if (commandSelector == @selector(insertBacktab:))
return ![self textViewShouldInsertBacktab:textView];
else if (commandSelector == @selector(insertNewline:))
return ![self textViewShouldInsertNewline:textView];
else if (commandSelector == @selector(deleteBackward:))
return ![self textViewShouldDeleteBackward:textView];
else if (commandSelector == @selector(moveToLeftEndOfLine:))
return ![self textViewShouldMoveToLeftEndOfLine:textView];
return NO;
}
- (BOOL)textView:(NSTextView *)textView shouldChangeTextInRange:(NSRange)range
replacementString:(NSString *)str
{
// Ignore if this originates from an IM marked text commit event.
if (NSIntersectionRange(textView.markedRange, range).length)
return YES;
if (self.preferences.editorCompleteMatchingCharacters)
{
BOOL strikethrough = self.preferences.extensionStrikethough;
if ([textView completeMatchingCharactersForTextInRange:range
withString:str
strikethroughEnabled:strikethrough])
return NO;
}
// For every change, set the typing attributes
if (range.location > 0) {
NSRange prevRange = range;
prevRange.location -= 1;
prevRange.length = 1;
NSDictionary *attr = [[textView attributedString] fontAttributesInRange:prevRange];
[textView setTypingAttributes:attr];
}
return YES;
}
#pragma mark - Fake NSTextViewDelegate
- (BOOL)textViewShouldInsertTab:(NSTextView *)textView
{
if (textView.selectedRange.length != 0)
{
[self indent:nil];
return NO;
}
else if (self.preferences.editorConvertTabs)
{
[textView insertSpacesForTab];
return NO;
}
return YES;
}
- (BOOL)textViewShouldInsertBacktab:(NSTextView *)textView
{
[self unindent:nil];
return NO;
}
- (BOOL)textViewShouldInsertNewline:(NSTextView *)textView
{
if ([textView insertMappedContent])
return NO;
BOOL inserts = self.preferences.editorInsertPrefixInBlock;
if (inserts && [textView completeNextListItem:
self.preferences.editorAutoIncrementNumberedLists])
return NO;
if (inserts && [textView completeNextBlockquoteLine])
return NO;
if ([textView completeNextIndentedLine])
return NO;
return YES;
}
- (BOOL)textViewShouldDeleteBackward:(NSTextView *)textView
{
NSRange selectedRange = textView.selectedRange;
if (self.preferences.editorCompleteMatchingCharacters)
{
NSUInteger location = selectedRange.location;
if ([textView deleteMatchingCharactersAround:location])
return NO;
}
if (self.preferences.editorConvertTabs && !selectedRange.length)
{
NSUInteger location = selectedRange.location;
if ([textView unindentForSpacesBefore:location])
return NO;
}
return YES;
}
- (BOOL)textViewShouldMoveToLeftEndOfLine:(NSTextView *)textView
{
if (!self.preferences.editorSmartHome)
return YES;
NSUInteger cur = textView.selectedRange.location;
NSUInteger location =
[textView.string locationOfFirstNonWhitespaceCharacterInLineBefore:cur];
if (location == cur || cur == 0)
return YES;
else if (cur >= textView.string.length)
cur = textView.string.length - 1;
// We don't want to jump rows when the line is wrapped. (#103)
// If the line is wrapped, the target will be higher than the current glyph.
NSLayoutManager *manager = textView.layoutManager;
NSTextContainer *container = textView.textContainer;
NSRect targetRect =
[manager boundingRectForGlyphRange:NSMakeRange(location, 1)
inTextContainer:container];
NSRect currentRect =
[manager boundingRectForGlyphRange:NSMakeRange(cur, 1)
inTextContainer:container];
if (targetRect.origin.y != currentRect.origin.y)
return YES;
textView.selectedRange = NSMakeRange(location, 0);
return NO;
}
#pragma mark - WebResourceLoadDelegate
- (NSURLRequest *)webView:(WebView *)sender resource:(id)identifier willSendRequest:(NSURLRequest *)request redirectResponse:(NSURLResponse *)redirectResponse fromDataSource:(WebDataSource *)dataSource
{
if ([[request.URL lastPathComponent] isEqualToString:@"MathJax.js"])
{
NSURLComponents *origComps = [NSURLComponents componentsWithURL:[request URL] resolvingAgainstBaseURL:YES];
NSURLComponents *updatedComps = [NSURLComponents componentsWithURL:[[NSBundle mainBundle] URLForResource:@"MathJax" withExtension:@"js" subdirectory:@"MathJax"] resolvingAgainstBaseURL:NO];
[updatedComps setQueryItems:[origComps queryItems]];
request = [NSURLRequest requestWithURL:[updatedComps URL]];
}
return request;
}
#pragma mark - WebFrameLoadDelegate
- (void)webView:(WebView *)sender didCommitLoadForFrame:(WebFrame *)frame
{
NSWindow *window = sender.window;
@synchronized(window) {
if (!window.isFlushWindowDisabled)
[window disableFlushWindow];
}
// If MathJax is off, the on-completion callback will be invoked directly
// when loading is done (in -webView:didFinishLoadForFrame:).
if (self.preferences.htmlMathJax)
{
MPMathJaxListener *listener = [[MPMathJaxListener alloc] init];
[listener addCallback:MPGetPreviewLoadingCompletionHandler(self)
forKey:@"End"];
[sender.windowScriptObject setValue:listener forKey:@"MathJaxListener"];
}
}
- (void)webView:(WebView *)sender didFinishLoadForFrame:(WebFrame *)frame
{
// If MathJax is on, the on-completion callback will be invoked by the
// JavaScript handler injected in -webView:didCommitLoadForFrame:.
if (!self.preferences.htmlMathJax)
{
id callback = MPGetPreviewLoadingCompletionHandler(self);
NSOperationQueue *queue = [NSOperationQueue mainQueue];
[queue addOperationWithBlock:callback];
}
self.isPreviewReady = YES;
// Update word count
if (self.preferences.editorShowWordCount)
[self updateWordCount];
self.alreadyRenderingInWeb = NO;
if (self.renderToWebPending)
[self.renderer parseAndRenderNow];
self.renderToWebPending = NO;
}
- (void)webView:(WebView *)sender didFailLoadWithError:(NSError *)error
forFrame:(WebFrame *)frame
{
[self webView:sender didFinishLoadForFrame:frame];
self.alreadyRenderingInWeb = NO;
if (self.renderToWebPending)
[self.renderer parseAndRenderNow];
self.renderToWebPending = NO;
}
#pragma mark - WebPolicyDelegate
- (void)webView:(WebView *)webView
decidePolicyForNavigationAction:(NSDictionary *)information
request:(NSURLRequest *)request frame:(WebFrame *)frame
decisionListener:(id<WebPolicyDecisionListener>)listener
{
switch ([information[WebActionNavigationTypeKey] integerValue])
{
case WebNavigationTypeLinkClicked:
// If the target is exactly as the current one, ignore.
if ([self.currentBaseUrl isEqual:request.URL])
{
[listener ignore];
return;
}
// If this is a different page, intercept and handle ourselves.
else if (![self isCurrentBaseUrl:request.URL])
{
[listener ignore];
[self openOrCreateFileForUrl:request.URL];
return;
}
// Otherwise this is somewhere else on the same page. Jump there.
break;
default:
break;
}
[listener use];
}
#pragma mark - WebEditingDelegate
- (BOOL)webView:(WebView *)webView doCommandBySelector:(SEL)selector
{
if (selector == @selector(copy:))
{
NSString *html = webView.selectedDOMRange.markupString;
// Inject the HTML content later so that it doesn't get cleared during
// the native copy operation.
[[NSOperationQueue mainQueue] addOperationWithBlock:^{
NSPasteboard *pb = [NSPasteboard generalPasteboard];
if (![pb stringForType:@"public.html"])
[pb setString:html forType:@"public.html"];
}];
}
return NO;
}
#pragma mark - WebUIDelegate
- (NSUInteger)webView:(WebView *)webView
dragDestinationActionMaskForDraggingInfo:(id<NSDraggingInfo>)info
{
return WebDragDestinationActionNone;
}
#pragma mark - MPRendererDataSource
- (BOOL)rendererLoading {
return self.preview.loading;
}
- (NSString *)rendererMarkdown:(MPRenderer *)renderer
{
return self.editor.string;
}
- (NSString *)rendererHTMLTitle:(MPRenderer *)renderer
{
NSString *n = self.fileURL.lastPathComponent.stringByDeletingPathExtension;
return n ? n : @"";
}
#pragma mark - MPRendererDelegate
- (int)rendererExtensions:(MPRenderer *)renderer
{
return self.preferences.extensionFlags;
}
- (BOOL)rendererHasSmartyPants:(MPRenderer *)renderer
{
return self.preferences.extensionSmartyPants;
}
- (BOOL)rendererRendersTOC:(MPRenderer *)renderer
{