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Forked from drnic/AppController.m
Created December 28, 2011 00:37
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// FROM: http://svn.cocoasourcecode.com/SkinnableApp/AppController.m
//
// AppController.m
// SkinnableApp
//
// Created by Matt Gemmell on 24/02/2008.
// Copyright 2008 Magic Aubergine. All rights reserved.
//
#import "AppController.h"
@implementation AppController
#pragma mark Setup
- (void)awakeFromNib
{
// Set us up as the delegate of the webView for relevant events.
[webView setDrawsBackground:NO];
[webView setUIDelegate:self];
[webView setFrameLoadDelegate:self];
[webView setEditingDelegate:self];
// Configure webView to let JavaScript talk to this object.
[[webView windowScriptObject] setValue:self forKey:@"AppController"]; // can be any unique name you want
/*
Notes:
1. In JavaScript, you can now talk to this object using "window.AppController".
2. You must explicitly allow methods to be called from JavaScript;
See the +isSelectorExcludedFromWebScript: method below for an example.
3. The method on this class which we call from JavaScript is -showMessage:
To call it from JavaScript, we use window.AppController.showMessage_() <-- NOTE colon becomes underscore!
For more on method-name translation, see:
http://developer.apple.com/documentation/AppleApplications/Conceptual/SafariJSProgTopics/Tasks/ObjCFromJavaScript.html#
*/
// Load the HTML content.
NSString *resourcesPath = [[NSBundle mainBundle] resourcePath];
NSString *htmlPath = [resourcesPath stringByAppendingString:@"/index.html"];
[[webView mainFrame] loadRequest:[NSURLRequest requestWithURL:[NSURL fileURLWithPath:htmlPath]]];
// Set up the themes chooser.
[themeChooser removeAllItems];
NSArray *themes = [[NSBundle mainBundle] pathsForResourcesOfType:@"css" inDirectory:nil];
for (NSString *theme in themes) {
// Get theme name without file-extension
NSString *themeName = [theme lastPathComponent];
NSRange dotRange = [themeName rangeOfString:@"."];
if (dotRange.location != NSNotFound) {
themeName = [themeName substringToIndex:dotRange.location];
}
NSMenuItem *menuItem = [[NSMenuItem alloc] initWithTitle:themeName
action:@selector(changeTheme:)
keyEquivalent:@""];
[menuItem setTarget:self];
[menuItem setRepresentedObject:[theme lastPathComponent]];
if ([themeName isEqualToString:@"Default"]) {
[menuItem setState:NSOnState];
}
[[themeChooser menu] addItem:menuItem];
[menuItem release];
}
}
+ (BOOL)isSelectorExcludedFromWebScript:(SEL)aSelector
{
// For security, you must explicitly allow a selector to be called from JavaScript.
if (aSelector == @selector(showMessage:)) {
return NO; // i.e. showMessage: is NOT _excluded_ from scripting, so it can be called.
}
return YES; // disallow everything else
}
#pragma mark WebView delegate methods
- (void)webView:(WebView *)sender didFinishLoadForFrame:(WebFrame *)frame
{
// This is a WebView Frame Load Delegate method.
// The HTML document just loaded, so we'll grab the current content of
// the 'contentTitle' H1 tag, and put it in the titleText NSTextField.
// This code shows you how to get a value from the HTML document.
DOMDocument *myDOMDocument = [[webView mainFrame] DOMDocument];
DOMElement *contentTitle = [myDOMDocument getElementById:@"contentTitle"];
[titleText setStringValue:[[contentTitle firstChild] nodeValue]];
}
- (NSArray *)webView:(WebView *)sender contextMenuItemsForElement:(NSDictionary *)element
defaultMenuItems:(NSArray *)defaultMenuItems
{
// This is a WebView UI Delegate method.
return nil; // disable contextual menu for the webView
}
- (BOOL)webView:(WebView *)webView shouldChangeSelectedDOMRange:(DOMRange *)currentRange
toDOMRange:(DOMRange *)proposedRange affinity:(NSSelectionAffinity)selectionAffinity
stillSelecting:(BOOL)flag
{
// This is a WebView Editing Delegate method.
return NO; // prevent selection of content
}
#pragma mark IBActions
- (IBAction)changeTheme:(id)sender
{
// The user just chose a theme in the NSPopUpButton, so we replace the HTML
// document's CSS file using JavaScript. This is a simple way to support
// dynamically loaded CSS themes.
WebScriptObject *scriptObject = [webView windowScriptObject];
NSString *theme = [[themeChooser selectedItem] representedObject];
NSString *script = [NSString stringWithFormat:@"document.getElementById('ss').href = '%@'", theme];
[scriptObject evaluateWebScript:script];
}
- (IBAction)addContent:(id)sender
{
// The user just clicked the Add Content NSButton, so we'll add a new P tag
// to the HTML, with some default content. This shows you how to add content
// into an HTML document without reloading the page.
DOMDocument *myDOMDocument = [[webView mainFrame] DOMDocument];
DOMElement *paraBlock = [myDOMDocument getElementById:@"main_content"];
DOMElement *newPara = [myDOMDocument createElement:@"p"];
DOMText *newText = [myDOMDocument createTextNode:@"Some new content"];
[newPara appendChild:newText];
[paraBlock appendChild:newPara];
}
- (IBAction)setTitle:(id)sender {
// The user clicked the Set Title button, so we'll take whatever text is in
// the titleText NSTextField and replace the current content of the 'contentTitle'
// H1 tag in the HTML with the new text. This shows you how to replace some HTML
// content with new content.
DOMDocument *myDOMDocument = [[webView mainFrame] DOMDocument];
DOMText *newText = [myDOMDocument createTextNode:[titleText stringValue]];
DOMElement *contentTitle = [myDOMDocument getElementById:@"contentTitle"];
[contentTitle replaceChild:newText oldChild:[contentTitle firstChild]];
}
- (void)showMessage:(NSString *)message
{
// This method is called from the JavaScript "onClick" handler of the INPUT element
// in the HTML. This shows you how to have HTML form elements call Cocoa methods.
NSRunAlertPanel(@"Message from JavaScript", message, nil, nil, nil);
}
@end
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