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Initial commit of CPWebView
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Tom Robinson committed
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/*
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* CPWebView.j
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* AppKit
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*
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* Created by Thomas Robinson.
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* Copyright 2008, 280 North, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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import "CPView.j"
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// FIXME: implement these where possible:
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/*
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CPWebViewDidBeginEditingNotification = "CPWebViewDidBeginEditingNotification";
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CPWebViewDidChangeNotification = "CPWebViewDidChangeNotification";
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CPWebViewDidChangeSelectionNotification = "CPWebViewDidChangeSelectionNotification";
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CPWebViewDidChangeTypingStyleNotification = "CPWebViewDidChangeTypingStyleNotification";
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CPWebViewDidEndEditingNotification = "CPWebViewDidEndEditingNotification";
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CPWebViewProgressEstimateChangedNotification = "CPWebViewProgressEstimateChangedNotification";
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*/
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CPWebViewProgressStartedNotification = "CPWebViewProgressStartedNotification";
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CPWebViewProgressFinishedNotification = "CPWebViewProgressFinishedNotification";
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// FIXME: somehow make CPWebView work with CPScrollView instead of native scrollbars (is this even possible?)
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@implementation CPWebView : CPView
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{
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IFrame _iframe;
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CPString _mainFrameURL;
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CPArray _backwardStack;
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CPArray _forwardStack;
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BOOL _ignoreLoadEvent;
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id _downloadDelegate;
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id _frameLoadDelegate;
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id _policyDelegate;
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id _resourceLoadDelegate;
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id _UIDelegate;
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CPWebScriptObject _wso;
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}
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- (id)initWithFrame:(CPRect)frameRect frameName:(CPString)frameName groupName:(CPString)groupName
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{
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if (self = [self initWithFrame:frameRect])
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{
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_iframe.name = frameName;
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}
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return self
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}
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- (id)initWithFrame:(CPRect)aFrame
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{
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if (self = [super initWithFrame:aFrame])
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{
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_mainFrameURL = nil;
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_backwardStack = [];
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_forwardStack = [];
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_ignoreLoadEvent = NO;
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_iframe = document.createElement("iframe");
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_iframe.name = "iframe_" + Math.floor(Math.random()*10000);
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_iframe.style.width = "100%";
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_iframe.style.height = "100%";
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_iframe.style.borderWidth = "0px";
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var loadCallback = function() {
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// HACK: this block handles the case where we don't know about loads initiated by the user clicking a link
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if (!_ignoreLoadEvent)
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{
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// post the start load notification
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[self _startedLoading];
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if (_mainFrameURL)
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[_backwardStack addObject:_mainFrameURL];
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// FIXME: this doesn't actually get the right URL for different domains. Probably not be possible due to browser security restrictions.
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_mainFrameURL = _iframe.src;
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[_forwardStack removeAllObjects];
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}
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_ignoreLoadEvent = NO;
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[self _finishedLoading]
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}
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if (_iframe.addEventListener)
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_iframe.addEventListener("load", loadCallback, false);
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else if (_iframe.attachEvent)
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_iframe.attachEvent("onload", loadCallback);
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_DOMElement.appendChild(_iframe);
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}
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return self;
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}
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- (BOOL)drawsBackground
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{
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return _iframe.style.backgroundColor != "";
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}
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- (void)setDrawsBackground:(BOOL)drawsBackround
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{
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_iframe.style.backgroundColor = drawsBackround ? "white" : "";
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}
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- (CPString)mainFrameURL
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{
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return _mainFrameURL;
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}
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- (void)_loadMainFrameURL
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{
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[self _startedLoading];
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_ignoreLoadEvent = YES;
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_iframe.src = _mainFrameURL;
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}
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- (void)_startedLoading
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{
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[[CPNotificationCenter defaultCenter] postNotificationName:CPWebViewProgressStartedNotification object:self];
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if ([_frameLoadDelegate respondsToSelector:@selector(webView:didStartProvisionalLoadForFrame:)])
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[_frameLoadDelegate webView:self didStartProvisionalLoadForFrame:nil]; // FIXME: give this a frame somehow?
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}
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- (void)_finishedLoading
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{
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[[CPNotificationCenter defaultCenter] postNotificationName:CPWebViewProgressFinishedNotification object:self];
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if ([_frameLoadDelegate respondsToSelector:@selector(webView:didFinishLoadForFrame:)])
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[_frameLoadDelegate webView:self didFinishLoadForFrame:nil]; // FIXME: give this a frame somehow?
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}
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- (void)setMainFrameURL:(CPString)URLString
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{
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if (_mainFrameURL)
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[_backwardStack addObject:_mainFrameURL];
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_mainFrameURL = URLString;
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[_forwardStack removeAllObjects];
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[self _loadMainFrameURL];
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}
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- (IBAction)takeStringURLFrom:(id)sender
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{
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[self setMainFrameURL:[sender stringValue]];
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}
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- (BOOL)goBack
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{
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if (_backwardStack.length > 0)
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{
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if (_mainFrameURL)
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[_forwardStack addObject:_mainFrameURL];
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_mainFrameURL = [_backwardStack lastObject];
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[_backwardStack removeLastObject];
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[self _loadMainFrameURL];
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return YES;
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}
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return NO;
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}
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- (BOOL)goForward
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{
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if (_forwardStack.length > 0)
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{
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if (_mainFrameURL)
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[_backwardStack addObject:_mainFrameURL];
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_mainFrameURL = [_forwardStack lastObject];
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[_forwardStack removeLastObject];
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[self _loadMainFrameURL];
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return YES;
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}
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return NO;
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}
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- (IBAction)goBack:(id)sender
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{
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[self goBack];
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}
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- (IBAction)goForward:(id)sender
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{
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[self goForward];
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}
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- (BOOL)canGoBack
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{
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return (_backwardStack.length > 0);
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}
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- (BOOL)canGoForward
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{
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return (_forwardStack.length > 0);
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}
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- (WebBackForwardList)backForwardList
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{
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// FIXME: return a real WebBackForwardList?
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return { back: _backwardStack, forward: _forwardStack };
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}
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- (void)close
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{
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_DOMElement.removeChild(_iframe);
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}
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- (Window)window
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{
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return (_iframe.contentDocument && _iframe.contentDocument.defaultView) || _iframe.contentWindow;
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}
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- (CPWebScriptObject)windowScriptObject
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{
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var win = [self window];
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if (!_wso || win != [_wso window])
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{
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if (win)
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_wso = [[CPWebScriptObject alloc] initWithWindow:win];
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else
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_wso = nil;
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}
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return _wso;
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}
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- (CPString)stringByEvaluatingJavaScriptFromString:(CPString)script
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{
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var result = [self objectByEvaluatingJavaScriptFromString:script];
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return result ? String(result) : nil;
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}
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- (JSObject)objectByEvaluatingJavaScriptFromString:(CPString)script
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{
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return [[self windowScriptObject] evaluateWebScript:script];
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}
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- (DOMCSSStyleDeclaration)computedStyleForElement:(DOMElement)element pseudoElement:(CPString)pseudoElement
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{
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var win = [[self windowScriptObject] window];
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if (win)
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{
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// FIXME: IE version?
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return win.document.defaultView.getComputedStyle(element, pseudoElement);
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}
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return nil;
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}
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// Delegates:
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// FIXME: implement more delegates, though most of these will likely never work with the iframe implementation
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- (id)downloadDelegate
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{
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return _downloadDelegate;
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}
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- (void)setDownloadDelegate:(id)anObject
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{
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_downloadDelegate = anObject;
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}
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- (id)frameLoadDelegate
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{
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return _frameLoadDelegate;
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}
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- (void)setFrameLoadDelegate:(id)anObject
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{
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_frameLoadDelegate = anObject;
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}
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- (id)policyDelegate
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{
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return _policyDelegate;
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}
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- (void)setPolicyDelegate:(id)anObject
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{
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_policyDelegate = anObject;
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}
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- (id)resourceLoadDelegate
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{
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return _resourceLoadDelegate;
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}
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- (void)setResourceLoadDelegate:(id)anObject
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{
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_resourceLoadDelegate = anObject;
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}
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- (id)UIDelegate
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{
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return _UIDelegate;
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}
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- (void)setUIDelegate:(id)anObject
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{
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_UIDelegate = anObject;
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}
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- (void)loadHTMLString:(CPString)aString
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{
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[self loadHTMLString:aString baseURL:nil];
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}
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- (void)loadHTMLString:(CPString)aString baseURL:(CPURL)URL
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{
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// FIXME: do something with baseURL?
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// clear the iframe
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_iframe.src = "";
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// need to give the browser a chance to reset iframe, otherwise we'll be document.write()-ing the previous document
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window.setTimeout(function() {
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var win = [self window];
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win.document.write(aString);
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}, 0);
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}
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@end
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@implementation CPWebScriptObject : CPObject
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{
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Window _window;
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}
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- (id)initWithWindow:(Window)aWindow
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{
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if (self = [super init])
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{
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_window = aWindow
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}
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return self;
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}
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- (id)callWebScriptMethod:(CPString)methodName withArguments:(CPArray)args
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{
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// Would using "with" be better here?
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if (typeof _window[methodName] == "function")
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{
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try {
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return _window[methodName].apply(args);
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} catch (e) {
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}
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}
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return undefined;
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}
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- (id)evaluateWebScript:(CPString)script
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{
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try {
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return _window.eval(script);
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} catch (e) {
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}
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return undefined;
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}
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- (Window)window
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{
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return _window;
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}
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@end
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