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[wxWidgets.git] / src / html / htmlctrl / webkit / webkit.mm

/////////////////////////////////////////////////////////////////////////////
// Name:        webkit.mm
// Purpose:     wxWebKitCtrl - embeddable web kit control
// Author:      Jethro Grassie / Kevin Ollivier
// Modified by:
// Created:     2004-4-16
// RCS-ID:      $Id$
// Copyright:   (c) Jethro Grassie / Kevin Ollivier
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
    #pragma implementation "webkit.h"
#endif

// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"

#ifndef WX_PRECOMP
    #include "wx/wx.h"
#endif

#if wxUSE_WEBKIT

#ifdef __WXCOCOA__
#include "wx/cocoa/autorelease.h"
#else
#include "wx/mac/uma.h"
#include <Carbon/Carbon.h>
#include <WebKit/HIWebView.h>
#include <WebKit/CarbonUtils.h>
#endif

#include "wx/html/webkit.h"
#include "wx/notebook.h"


// ----------------------------------------------------------------------------
// macros
// ----------------------------------------------------------------------------

#if !USE_SHARED_LIBRARY
IMPLEMENT_DYNAMIC_CLASS(wxWebKitCtrl, wxControl)
#endif

BEGIN_EVENT_TABLE(wxWebKitCtrl, wxControl)
    EVT_SIZE(wxWebKitCtrl::OnSize)
END_EVENT_TABLE()

// ----------------------------------------------------------------------------
// wxWebKit Events
// ----------------------------------------------------------------------------

IMPLEMENT_DYNAMIC_CLASS( wxWebKitStateChangedEvent, wxCommandEvent )

DEFINE_EVENT_TYPE( wxEVT_WEBKIT_STATE_CHANGED )

wxWebKitStateChangedEvent::wxWebKitStateChangedEvent( wxWindow* win )
{
    SetEventType( wxEVT_WEBKIT_STATE_CHANGED);
    SetEventObject( win );
    SetId(win->GetId());
}

//---------------------------------------------------------
// helper functions for NSString<->wxString conversion
//---------------------------------------------------------

inline wxString wxStringWithNSString(NSString *nsstring)
{
#if wxUSE_UNICODE
    return wxString([nsstring UTF8String], wxConvUTF8);
#else
    return wxString([nsstring lossyCString]);
#endif // wxUSE_UNICODE
}

inline NSString* wxNSStringWithWxString(const wxString &wxstring)
{
#if wxUSE_UNICODE
    return [NSString stringWithUTF8String: wxstring.mb_str(wxConvUTF8)];
#else
    return [NSString stringWithCString: wxstring.c_str() length:wxstring.Len()];
#endif // wxUSE_UNICODE
}

@interface MyFrameLoadMonitor : NSObject
{
    wxWindow* webKitWindow;
}

- initWithWxWindow: (wxWindow*)inWindow;

@end

// ----------------------------------------------------------------------------
// creation/destruction
// ----------------------------------------------------------------------------

bool wxWebKitCtrl::Create(wxWindow *parent,
                                 wxWindowID winID,
                                 const wxString& strURL,
                                 const wxPoint& pos,
                                 const wxSize& size, long style,
                                 const wxValidator& validator,
                                 const wxString& name)
{

    m_currentURL = strURL;
    //m_pageTitle = _("Untitled Page");

 //still needed for wxCocoa??
/*
    int width, height;
    wxSize sizeInstance;
    if (size.x == wxDefaultCoord || size.y == wxDefaultCoord)
    {
        m_parent->GetClientSize(&width, &height);
        sizeInstance.x = width;
        sizeInstance.y = height;
    }
    else
    {
        sizeInstance.x = size.x;
        sizeInstance.y = size.y;
    }
*/
    // now create and attach WebKit view...
#ifdef __WXCOCOA__
    wxControl::Create(parent, m_windowID, pos, sizeInstance, style , validator , name);
    SetSize(pos.x, pos.y, sizeInstance.x, sizeInstance.y);

    wxTopLevelWindowCocoa *topWin = wxDynamicCast(this, wxTopLevelWindowCocoa);
    NSWindow* nsWin = topWin->GetNSWindow();
    NSRect rect;
    rect.origin.x = pos.x;
    rect.origin.y = pos.y;
    rect.size.width = sizeInstance.x;
    rect.size.height = sizeInstance.y;
    m_webView = (WebView*)[[WebView alloc] initWithFrame:rect frameName:@"webkitFrame" groupName:@"webkitGroup"];
    SetNSView(m_webView);
    [m_cocoaNSView release];

    if(m_parent) m_parent->CocoaAddChild(this);
    SetInitialFrameRect(pos,sizeInstance);
#else
    m_macIsUserPane = false;
	wxControl::Create(parent, m_windowID, pos, size, style , validator , name);
    m_peer = new wxMacControl(this);
    WebInitForCarbon();
    HIWebViewCreate( m_peer->GetControlRefAddr() );

    m_webView = (WebView*) HIWebViewGetWebView( m_peer->GetControlRef() );
    MacPostControlCreate(pos, size);
    HIViewSetVisible( m_peer->GetControlRef(), true );
    [m_webView setHidden:false];
#endif

    // Register event listener interfaces
    MyFrameLoadMonitor* myFrameLoadMonitor = [[MyFrameLoadMonitor alloc] initWithWxWindow: (wxWindow*)this];
    [m_webView setFrameLoadDelegate:myFrameLoadMonitor];

    LoadURL(m_currentURL);
    return true;
}

wxWebKitCtrl::~wxWebKitCtrl()
{

}

// ----------------------------------------------------------------------------
// public methods
// ----------------------------------------------------------------------------

void wxWebKitCtrl::LoadURL(const wxString &url)
{
    if( !m_webView )
        return;

    [[m_webView mainFrame] loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:wxNSStringWithWxString(url)]]];

    m_currentURL = url;
}

bool wxWebKitCtrl::CanGoBack(){
    if ( !m_webView )
        return false;

    return [m_webView canGoBack];
}

bool wxWebKitCtrl::CanGoForward(){
    if ( !m_webView )
        return false;

    return [m_webView canGoForward];
}

bool wxWebKitCtrl::GoBack(){
    if ( !m_webView )
        return false;

    bool result = [(WebView*)m_webView goBack];
    return result;
}

bool wxWebKitCtrl::GoForward(){
    if ( !m_webView )
        return false;

    bool result = [(WebView*)m_webView goForward];
    return result;
}

void wxWebKitCtrl::Reload(){
    if ( !m_webView )
        return;

    [[m_webView mainFrame] reload];
}

void wxWebKitCtrl::Stop(){
    if ( !m_webView )
        return;

    [[m_webView mainFrame] stopLoading];
}

bool wxWebKitCtrl::CanGetPageSource(){
    if ( !m_webView )
        return false;

    WebDataSource* dataSource = [[m_webView mainFrame] dataSource];
    return ( [[dataSource representation] canProvideDocumentSource] );
}

wxString wxWebKitCtrl::GetPageSource(){

    if (CanGetPageSource()){
        WebDataSource* dataSource = [[m_webView mainFrame] dataSource];
        return wxStringWithNSString( [[dataSource representation] documentSource] );
    }

    return wxEmptyString;
}

void wxWebKitCtrl::SetPageSource(wxString& source, const wxString& baseUrl){
    if ( !m_webView )
        return;

    if (CanGetPageSource()){
        [[m_webView mainFrame] loadHTMLString:(NSString*)wxNSStringWithWxString( source ) baseURL:[NSURL URLWithString:wxNSStringWithWxString( baseUrl )]];
    }

}

void wxWebKitCtrl::OnSize(wxSizeEvent &event){
    // This is a nasty hack because WebKit seems to lose its position when it is embedded
    // in a control that is not itself the content view for a TLW.
	// I put it in OnSize because these calcs are not perfect, and in fact are basically 
	// guesses based on reverse engineering, so it's best to give people the option of
	// overriding OnSize with their own calcs if need be.
	// I also left some test debugging print statements as a convenience if a(nother)
	// problem crops up.
	
	// Let's hope that Tiger fixes this mess...
	
	int x, y; 
	x = 0;
	y = 0;
	
	bool isParentTopLevel = true;
			
	wxWindow* parent = GetParent();
	
	wxWindow* tlw = MacGetTopLevelWindow();
	
	// This must be the case that Apple tested with, because well, in this one case
	// we don't need to do anything! It just works. ;)
	if (parent == tlw){
		return;
	}
					
	while(parent != NULL)
	{
		if ( parent->GetClassInfo()->GetClassName() == wxT("wxSplitterWindow") ){
			//do nothing in this case
		}
		else{
			if (!parent->IsTopLevel()) {
				//printf("Parent: %s\n", parent->GetClassInfo()->GetClassName());
				int plusx = 0;
				plusx = parent->GetClientAreaOrigin().x + parent->GetPosition().x; 
				if (plusx > 0){
					x += plusx; 
					//printf("Parent: %s Added x: %d\n", parent->GetClassInfo()->GetClassName(), parent->GetClientAreaOrigin().x + parent->GetPosition().x);
				}
				
				int plusy = 0;
				plusy = parent->GetClientAreaOrigin().y + parent->GetPosition().y;
				if (plusy > 0){
					y += plusy; 
					//printf("Parent: %s Added y: %d\n", parent->GetClassInfo()->GetClassName(), parent->GetClientAreaOrigin().y + parent->GetPosition().y);
				}
				else{
					//printf("Parent: %s Origin: %d Position:%d\n", parent->GetClassInfo()->GetClassName(), parent->GetClientAreaOrigin().y, parent->GetPosition().y);
				}
				
			}
			else{
				// 
				x += parent->GetClientAreaOrigin().x;
				// calculate the title bar height (26 pixels) into the top offset.
				// This becomes important later when we must flip the y coordinate
				// to convert to Cocoa's coordinate system.
				y += parent->GetClientAreaOrigin().y += 26;
				//printf("x: %d, y:%d\n", x, y);
			}
			//we still need to add the y, because we have to convert/flip coordinates for Cocoa

			if ( parent->IsKindOf( CLASSINFO( wxNotebook ) )  ){
				//Not sure why calcs are off in this one scenario...
				x -= 3;
				//printf("x: %d, y:%d\n", x, y);
			}
			
			if (parent->IsKindOf( CLASSINFO( wxPanel ) ) ){
				// Another strange case. Adding a wxPanel to the parent heirarchy
				// causes wxWebKitCtrl's Cocoa y origin to be 4 pixels off 
				// for some reason, even if the panel has a position and origin of 0. 
				// This corrects that. Man, I wish I could debug Carbon/HIWebView!! ;)
				y -= 4;
			}
		}

		parent = parent->GetParent();
	}

	// Tried using MacWindowToRootWindow both for wxWebKitCtrl and its parent,
	// but coordinates were off by a significant amount.
	// Am leaving the code here if anyone wants to play with it.
	
	//int x2, y2 = 0;
	//if (GetParent())
	//	GetParent()->MacWindowToRootWindow(&x2, &y2);
	//printf("x = %d, y = %d\n", x, y);
	//printf("x2 = %d, y2 = %d\n", x2, y2);
	//x = x2;
	//y = y2;
	
	if (tlw){
		//flip the y coordinate to convert to Cocoa coordinates
		//printf("tlw y: %d, y: %d\n", tlw->GetSize().y, (GetSize().y + y));
		y = tlw->GetSize().y - ((GetSize().y) + y);
	}
			
	//printf("Added to bounds x=%d, y=%d\n", x, y);
	NSRect bounds = [m_webView frame];
	bounds.origin.x = x;
	bounds.origin.y = y;
	[m_webView setFrame:bounds];

    //printf("Carbon position x=%d, y=%d\n", GetPosition().x, GetPosition().y);
    if (IsShown())
        [m_webView display];
    event.Skip();
}

void wxWebKitCtrl::MacVisibilityChanged(){
    bool isHidden = !IsControlVisible( m_peer->GetControlRef());
    if (!isHidden)
        [m_webView display];

    [m_webView setHidden:isHidden];
}

//------------------------------------------------------------
// Listener interfaces
//------------------------------------------------------------

@implementation MyFrameLoadMonitor

- initWithWxWindow: (wxWindow*)inWindow
{
    [super init];
    webKitWindow = inWindow;    // non retained
    return self;
}

- (void)webView:(WebView *)sender didStartProvisionalLoadForFrame:(WebFrame *)frame
{
    if (frame == [sender mainFrame]){
        NSString *url = [[[[frame provisionalDataSource] request] URL] absoluteString];
        wxWebKitStateChangedEvent thisEvent(webKitWindow);
        thisEvent.SetState(wxWEBKIT_STATE_NEGOTIATING);
        thisEvent.SetURL( wxStringWithNSString( url ) );
        webKitWindow->GetEventHandler()->ProcessEvent( thisEvent );
    }
}

- (void)webView:(WebView *)sender didCommitLoadForFrame:(WebFrame *)frame
{
    if (frame == [sender mainFrame]){
        NSString *url = [[[[frame dataSource] request] URL] absoluteString];
        wxWebKitStateChangedEvent thisEvent(webKitWindow);
        thisEvent.SetState(wxWEBKIT_STATE_TRANSFERRING);
        thisEvent.SetURL( wxStringWithNSString( url ) );
        webKitWindow->GetEventHandler()->ProcessEvent( thisEvent );
    }
}

- (void)webView:(WebView *)sender didFinishLoadForFrame:(WebFrame *)frame
{
    if (frame == [sender mainFrame]){
        NSString *url = [[[[frame dataSource] request] URL] absoluteString];
        wxWebKitStateChangedEvent thisEvent(webKitWindow);
        thisEvent.SetState(wxWEBKIT_STATE_STOP);
        thisEvent.SetURL( wxStringWithNSString( url ) );
        webKitWindow->GetEventHandler()->ProcessEvent( thisEvent );
    }
}

- (void)webView:(WebView *)sender didFailLoadWithError:(NSError*) error forFrame:(WebFrame *)frame
{
    if (frame == [sender mainFrame]){
        NSString *url = [[[[frame dataSource] request] URL] absoluteString];
        wxWebKitStateChangedEvent thisEvent(webKitWindow);
        thisEvent.SetState(wxWEBKIT_STATE_FAILED);
        thisEvent.SetURL( wxStringWithNSString( url ) );
        webKitWindow->GetEventHandler()->ProcessEvent( thisEvent );
    }
}

- (void)webView:(WebView *)sender didFailProvisionalLoadWithError:(NSError*) error forFrame:(WebFrame *)frame
{
    if (frame == [sender mainFrame]){
        NSString *url = [[[[frame provisionalDataSource] request] URL] absoluteString];
        wxWebKitStateChangedEvent thisEvent(webKitWindow);
        thisEvent.SetState(wxWEBKIT_STATE_FAILED);
        thisEvent.SetURL( wxStringWithNSString( url ) );
        webKitWindow->GetEventHandler()->ProcessEvent( thisEvent );
    }
}

- (void)webView:(WebView *)sender didReceiveTitle:(NSString *)title forFrame:(WebFrame *)frame
{
    if (frame == [sender mainFrame]){
        webKitWindow->SetTitle(wxStringWithNSString( title ));
    }
}
@end

#endif //wxUSE_WEBKIT