hiwebview.m

linux下开源浏览器WebKit的源码,市面上的很多商用浏览器都是移植自WebKit

/*
 * Copyright (C) 2005 Apple Computer, Inc.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1.  Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer. 
 * 2.  Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution. 
 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
 *     its contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission. 
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef __LP64__

#import "HIWebView.h"

#import "CarbonWindowAdapter.h"
#import "HIViewAdapter.h"
#import "WebHTMLViewInternal.h"
#import "WebKit.h"

#import <objc/objc-runtime.h>
#import <WebKitSystemInterface.h>

@interface NSWindow (AppKitSecretsHIWebViewKnows)
- (void)_removeWindowRef;
@end

@interface NSView (AppKitSecretsHIWebViewKnows)
- (void)_clearDirtyRectsForTree;
@end

extern "C" void HIWebViewRegisterClass();

@interface MenuItemProxy : NSObject <NSValidatedUserInterfaceItem>
{
    int     _tag;
    SEL _action;
}

- (id)initWithAction:(SEL)action;
- (SEL)action;
- (int)tag;

@end

@implementation MenuItemProxy

- (id)initWithAction:(SEL)action
{
    [super init];
    if (self == nil) return nil;

    _action = action;

    return self;
}

- (SEL)action
{
       return _action;
}

- (int)tag 
{
    return 0;
}

@end

struct HIWebView
{
    HIViewRef							fViewRef;

    WebView*							fWebView;
    NSView*								fFirstResponder;
    CarbonWindowAdapter	*				fKitWindow;
    bool								fIsComposited;
    CFRunLoopObserverRef				fUpdateObserver;
};
typedef struct HIWebView HIWebView;

static const OSType NSAppKitPropertyCreator = 'akit';
/*
These constants are not used. Commented out to make the compiler happy.
static const OSType NSViewCarbonControlViewPropertyTag = 'view';
static const OSType NSViewCarbonControlAutodisplayPropertyTag = 'autd';
static const OSType NSViewCarbonControlFirstResponderViewPropertyTag = 'frvw';
*/
static const OSType NSCarbonWindowPropertyTag = 'win ';

#ifdef BUILDING_ON_TIGER
const int typeByteCount = typeSInt32;
#endif

static SEL _NSSelectorForHICommand( const HICommand* hiCommand );

static const EventTypeSpec kEvents[] = { 
	{ kEventClassHIObject, kEventHIObjectConstruct },
	{ kEventClassHIObject, kEventHIObjectDestruct },
	
	{ kEventClassMouse, kEventMouseUp },
	{ kEventClassMouse, kEventMouseMoved },
	{ kEventClassMouse, kEventMouseDragged },
	{ kEventClassMouse, kEventMouseWheelMoved },

	{ kEventClassKeyboard, kEventRawKeyDown },
	{ kEventClassKeyboard, kEventRawKeyRepeat },

	{ kEventClassCommand, kEventCommandProcess },
	{ kEventClassCommand, kEventCommandUpdateStatus },

	{ kEventClassControl, kEventControlInitialize },
	{ kEventClassControl, kEventControlDraw },
	{ kEventClassControl, kEventControlHitTest },
	{ kEventClassControl, kEventControlGetPartRegion },
	{ kEventClassControl, kEventControlGetData },
	{ kEventClassControl, kEventControlBoundsChanged },
	{ kEventClassControl, kEventControlActivate },
	{ kEventClassControl, kEventControlDeactivate },
	{ kEventClassControl, kEventControlOwningWindowChanged },
	{ kEventClassControl, kEventControlClick },
	{ kEventClassControl, kEventControlContextualMenuClick },
	{ kEventClassControl, kEventControlSetFocusPart }
};

#define kHIViewBaseClassID		CFSTR( "com.apple.hiview" )
#define kHIWebViewClassID		CFSTR( "com.apple.HIWebView" )

static HIWebView*		HIWebViewConstructor( HIViewRef inView );
static void				HIWebViewDestructor( HIWebView* view );

static OSStatus			HIWebViewEventHandler(
								EventHandlerCallRef	inCallRef,
								EventRef			inEvent,
								void *				inUserData );

static UInt32			GetBehaviors();
static ControlKind		GetKind();
static void				Draw( HIWebView* inView, RgnHandle limitRgn, CGContextRef inContext );
static ControlPartCode	HitTest( HIWebView* view, const HIPoint* where );
static OSStatus			GetRegion( HIWebView* view, ControlPartCode inPart, RgnHandle outRgn );
static void				BoundsChanged(
								HIWebView*			inView,
								UInt32				inOptions,
								const HIRect*		inOriginalBounds,
								const HIRect*		inCurrentBounds );
static void				OwningWindowChanged(
								HIWebView*			view,
								WindowRef			oldWindow,
								WindowRef			newWindow );
static void				ActiveStateChanged( HIWebView* view );

static OSStatus			Click( HIWebView* inView, EventRef inEvent );
static OSStatus			ContextMenuClick( HIWebView* inView, EventRef inEvent );
static OSStatus			MouseUp( HIWebView* inView, EventRef inEvent );
static OSStatus			MouseMoved( HIWebView* inView, EventRef inEvent );
static OSStatus			MouseDragged( HIWebView* inView, EventRef inEvent );
static OSStatus			MouseWheelMoved( HIWebView* inView, EventRef inEvent );

static OSStatus			ProcessCommand( HIWebView* inView, const HICommand* inCommand );
static OSStatus			UpdateCommandStatus( HIWebView* inView, const HICommand* inCommand );

static OSStatus			SetFocusPart(
								HIWebView*				view,
								ControlPartCode 		desiredFocus,
								RgnHandle 				invalidRgn,
								Boolean 				focusEverything,
								ControlPartCode* 		actualFocus );
static NSView*			AdvanceFocus( HIWebView* view, bool forward );
static void				RelinquishFocus( HIWebView* view, bool inAutodisplay );

static WindowRef		GetWindowRef( HIWebView* inView );
static void				SyncFrame( HIWebView* inView );

static OSStatus			WindowHandler( EventHandlerCallRef inCallRef, EventRef inEvent, void* inUserData );

static void				StartUpdateObserver( HIWebView* view );
static void				StopUpdateObserver( HIWebView* view );

static inline void HIRectToQDRect( const HIRect* inRect, Rect* outRect )
{
    outRect->top = (SInt16)CGRectGetMinY( *inRect );
    outRect->left = (SInt16)CGRectGetMinX( *inRect );
    outRect->bottom = (SInt16)CGRectGetMaxY( *inRect );
    outRect->right = (SInt16)CGRectGetMaxX( *inRect );
}

//----------------------------------------------------------------------------------
// HIWebViewCreate
//----------------------------------------------------------------------------------
//
OSStatus
HIWebViewCreate(HIViewRef* outControl)
{
    HIWebViewRegisterClass();
    return HIObjectCreate(kHIWebViewClassID, NULL, (HIObjectRef*)outControl);
}

//----------------------------------------------------------------------------------
// HIWebViewGetWebView
//----------------------------------------------------------------------------------
//
WebView*
HIWebViewGetWebView( HIViewRef inView )
{
	HIWebView* 	view = (HIWebView*)HIObjectDynamicCast( (HIObjectRef)inView, kHIWebViewClassID );
	WebView*			result = NULL;
	
	if ( view )
		result = view->fWebView;
	
	return result;
}

//----------------------------------------------------------------------------------
// HIWebViewConstructor
//----------------------------------------------------------------------------------
//

static HIWebView*
HIWebViewConstructor( HIViewRef inView )
{
	HIWebView*		view = (HIWebView*)malloc( sizeof( HIWebView ) );
	
	if ( view )
	{
		NSRect		frame = { { 0, 0 }, { 400, 400  } };
	
		view->fViewRef = inView;

                WebView *webView = [[WebView alloc] initWithFrame: frame];
                CFRetain(webView);
                [webView release];
		view->fWebView = webView;
		[HIViewAdapter bindHIViewToNSView:inView nsView:view->fWebView];
		
		view->fFirstResponder = NULL;
		view->fKitWindow = NULL;
        view->fIsComposited = false;
        view->fUpdateObserver = NULL;
	}
	
	return view;
}

//----------------------------------------------------------------------------------
// HIWebViewDestructor
//----------------------------------------------------------------------------------
//
static void
HIWebViewDestructor( HIWebView* inView )
{
    [HIViewAdapter unbindNSView:inView->fWebView];
    CFRelease(inView->fWebView);

    free(inView);
}

//----------------------------------------------------------------------------------
// HIWebViewRegisterClass
//----------------------------------------------------------------------------------
//
void
HIWebViewRegisterClass()
{
	static bool sRegistered;
	
	if ( !sRegistered )
	{
		HIObjectRegisterSubclass( kHIWebViewClassID, kHIViewBaseClassID, 0, HIWebViewEventHandler,
			GetEventTypeCount( kEvents ), kEvents, 0, NULL );
		sRegistered = true;
	}
}

//----------------------------------------------------------------------------------
// GetBehaviors
//----------------------------------------------------------------------------------
//
static UInt32
GetBehaviors()
{
	return kControlSupportsDataAccess | kControlSupportsGetRegion | kControlGetsFocusOnClick;
}

//----------------------------------------------------------------------------------
// Draw
//----------------------------------------------------------------------------------
//
static void
Draw( HIWebView* inView, RgnHandle limitRgn, CGContextRef inContext )
{
	HIRect				bounds;
	Rect				drawRect;
	HIRect				hiRect;
	bool				createdContext = false;

    if (!inView->fIsComposited)
    {
        GrafPtr port;
        Rect portRect;

        GetPort( &port );
        GetPortBounds( port, &portRect );
        CreateCGContextForPort( port, &inContext );
        SyncCGContextOriginWithPort( inContext, port );
        CGContextTranslateCTM( inContext, 0, (portRect.bottom - portRect.top) );
        CGContextScaleCTM( inContext, 1, -1 );
        createdContext = true;
    }

	HIViewGetBounds( inView->fViewRef, &bounds );

    CGContextRef savedContext = WKNSWindowOverrideCGContext(inView->fKitWindow, inContext);
    [NSGraphicsContext setCurrentContext:[inView->fKitWindow graphicsContext]];

	GetRegionBounds( limitRgn, &drawRect );

    if ( !inView->fIsComposited )
        OffsetRect( &drawRect, (SInt16)-bounds.origin.x, (SInt16)-bounds.origin.y );
    
	hiRect.origin.x = drawRect.left;
	hiRect.origin.y = bounds.size.height - drawRect.bottom; // flip y
	hiRect.size.width = drawRect.right - drawRect.left;
	hiRect.size.height = drawRect.bottom - drawRect.top;

//    printf( "Drawing: drawRect is (%g %g) (%g %g)\n", hiRect.origin.x, hiRect.origin.y,
//            hiRect.size.width, hiRect.size.height );

    // FIXME: We need to do layout before Carbon has decided what region needs drawn.
    // In Cocoa we make sure to do layout and invalidate any new regions before draw, so everything
    // can be drawn in one pass. Doing a layout here will cause new regions to be invalidated, but they
    // will not all be drawn in this pass since we already have a fixed rect we are going to display.

    NSView <WebDocumentView> *documentView = [[[inView->fWebView mainFrame] frameView] documentView];
    if ([documentView isKindOfClass:[WebHTMLView class]])
        [(WebHTMLView *)documentView _web_layoutIfNeededRecursive];

    if ( inView->fIsComposited )
        [inView->fWebView displayIfNeededInRect: *(NSRect*)&hiRect];
    else
        [inView->fWebView displayRect:*(NSRect*)&hiRect];

    WKNSWindowRestoreCGContext(inView->fKitWindow, savedContext);

    if ( !inView->fIsComposited )
    {
        HIViewRef      view;
        HIViewFindByID( HIViewGetRoot( GetControlOwner( inView->fViewRef ) ), kHIViewWindowGrowBoxID, &view );
        if ( view )
        {
            HIRect     frame;

            HIViewGetBounds( view, &frame );
            HIViewConvertRect( &frame, view, NULL );

            hiRect.origin.x = drawRect.left;
            hiRect.origin.y = drawRect.top;
            hiRect.size.width = drawRect.right - drawRect.left;
            hiRect.size.height = drawRect.bottom - drawRect.top;

            HIViewConvertRect( &hiRect, inView->fViewRef, NULL );

            if ( CGRectIntersectsRect( frame, hiRect ) )
                HIViewSetNeedsDisplay( view, true );
        }
     }

    if ( createdContext )
    {
        CGContextSynchronize( inContext );
        CGContextRelease( inContext );
    }
}

//----------------------------------------------------------------------------------
// HitTest
//----------------------------------------------------------------------------------
//
static ControlPartCode
HitTest( HIWebView* view, const HIPoint* where )
{
	HIRect		bounds;
	
	HIViewGetBounds( view->fViewRef, &bounds );

	if ( CGRectContainsPoint( bounds, *where ) )