зеркало из https://github.com/mozilla/pjs.git
569 строки
16 KiB
C++
569 строки
16 KiB
C++
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/*
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* The contents of this file are subject to the Mozilla Public
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* License Version 1.1 (the "MPL"); you may not use this file
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* except in compliance with the MPL. You may obtain a copy of
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* the MPL at http://www.mozilla.org/MPL/
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*
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* Software distributed under the MPL is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the MPL for the specific language governing
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* rights and limitations under the MPL.
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*
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* The Original Code is XMLterm.
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*
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* The Initial Developer of the Original Code is Ramalingam Saravanan.
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* Portions created by Ramalingam Saravanan <svn@xmlterm.org> are
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* Copyright (C) 1999 Ramalingam Saravanan. All Rights Reserved.
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*
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* Contributor(s):
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*/
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// mozXMLTermStream.cpp: implementation of mozIXMLTermStream
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// to display HTML/XML streams as documents
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#include "nscore.h"
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#include "prlog.h"
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#include "nsCOMPtr.h"
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#include "nsString.h"
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#include "nsIAllocator.h"
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#include "nsIServiceManager.h"
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#include "nsIIOService.h"
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#include "nsIDocumentLoader.h"
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#include "nsIContentViewer.h"
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#include "nsIDocumentViewer.h"
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#include "nsIPresContext.h"
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#include "nsIPresShell.h"
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#include "nsIViewManager.h"
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#include "nsIScrollableView.h"
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#include "nsIDeviceContext.h"
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#include "nsIFrame.h"
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#include "nsIScriptContextOwner.h"
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#include "nsIScriptGlobalObject.h"
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#include "nsIDOMWindow.h"
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#include "nsIDOMWindowCollection.h"
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#include "nsIDOMElement.h"
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#include "nsIDOMNode.h"
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#include "nsIDOMNodeList.h"
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#include "nsIDOMDocument.h"
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#include "nsIDOMHTMLDocument.h"
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#include "nsIDocument.h"
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#include "nsIURL.h"
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#include "nsNeckoUtil.h"
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#include "mozXMLT.h"
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#include "mozXMLTermUtils.h"
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#include "mozXMLTermStream.h"
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/////////////////////////////////////////////////////////////////////////
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// mozXMLTermStream factory
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/////////////////////////////////////////////////////////////////////////
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nsresult
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NS_NewXMLTermStream(mozIXMLTermStream** aXMLTermStream)
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{
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NS_PRECONDITION(aXMLTermStream != nsnull, "null ptr");
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if (!aXMLTermStream)
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return NS_ERROR_NULL_POINTER;
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*aXMLTermStream = new mozXMLTermStream();
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if (! *aXMLTermStream)
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return NS_ERROR_OUT_OF_MEMORY;
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NS_ADDREF(*aXMLTermStream);
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return NS_OK;
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}
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/////////////////////////////////////////////////////////////////////////
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// mozXMLTermStream implementation
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/////////////////////////////////////////////////////////////////////////
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static NS_DEFINE_CID(kIOServiceCID, NS_IOSERVICE_CID);
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mozXMLTermStream::mozXMLTermStream() :
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mUTF8Buffer(""),
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mUTF8Offset(0),
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mMaxResizeHeight(0),
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mDOMWindow( nsnull ),
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mDOMIFrameElement( nsnull ),
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mContext( nsnull ),
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mLoadGroup( nsnull ),
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mChannel( nsnull ),
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mStreamListener( nsnull )
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{
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NS_INIT_REFCNT();
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}
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mozXMLTermStream::~mozXMLTermStream()
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{
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}
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// Implement AddRef and Release
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NS_IMPL_ADDREF(mozXMLTermStream)
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NS_IMPL_RELEASE(mozXMLTermStream)
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NS_IMETHODIMP
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mozXMLTermStream::QueryInterface(REFNSIID aIID,void** aInstancePtr)
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{
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if (aInstancePtr == NULL) {
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return NS_ERROR_NULL_POINTER;
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}
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// Always NULL result, in case of failure
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*aInstancePtr = NULL;
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if ( aIID.Equals(NS_GET_IID(nsISupports))) {
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*aInstancePtr = NS_STATIC_CAST(nsISupports*,
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NS_STATIC_CAST(mozIXMLTermStream*,this));
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} else if(aIID.Equals(NS_GET_IID(nsIBaseStream))) {
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*aInstancePtr = NS_STATIC_CAST(nsIBaseStream*,this);
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} else if(aIID.Equals(NS_GET_IID(nsIInputStream))) {
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*aInstancePtr = NS_STATIC_CAST(nsIInputStream*,this);
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} else if(aIID.Equals(NS_GET_IID(mozIXMLTermStream))) {
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*aInstancePtr = NS_STATIC_CAST(mozIXMLTermStream*,this);
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} else {
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return NS_ERROR_NO_INTERFACE;
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}
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NS_ADDREF_THIS();
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XMLT_LOG(mozXMLTermStream::QueryInterface,20,("mRefCnt = %d\n", mRefCnt));
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return NS_OK;
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}
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// mozIXMLTermStream interface
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/** Open stream in specified frame, or in current frame if frameName is null
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* @param aDOMWindow parent window
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* @param frameName name of child frame in which to display stream, or null
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* to display in parent window
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* @param contentURL URL of stream content
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* @param contentType MIME type of stream content
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* @param maxResizeHeight maximum resize height (0=> do not resize)
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* @return NS_OK on success
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*/
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NS_IMETHODIMP mozXMLTermStream::Open(nsIDOMWindow* aDOMWindow,
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const char* frameName,
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const char* contentURL,
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const char* contentType,
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PRInt32 maxResizeHeight)
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{
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nsresult result;
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XMLT_LOG(mozXMLTermStream::Open,20,("contentURL=%s, contentType=%s\n",
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contentURL, contentType));
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mMaxResizeHeight = maxResizeHeight;
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if (frameName && (strlen(frameName) > 0)) {
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// Open stream in named subframe of current frame
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XMLT_LOG(mozXMLTermStream::Open,22,("frameName=%s\n", frameName));
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nsAutoString innerFrameName = frameName;
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// Get DOM IFRAME element
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nsCOMPtr<nsIDOMDocument> domDoc;
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result = aDOMWindow->GetDocument(getter_AddRefs(domDoc));
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if (NS_FAILED(result) || !domDoc)
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return NS_ERROR_FAILURE;
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nsCOMPtr<nsIDOMHTMLDocument> domHTMLDoc = do_QueryInterface(domDoc);
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if (!domHTMLDoc)
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return NS_ERROR_FAILURE;
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nsCOMPtr<nsIDOMNodeList> nodeList;
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result = domHTMLDoc->GetElementsByName(innerFrameName,
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getter_AddRefs(nodeList));
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if (NS_FAILED(result) || !nodeList)
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return NS_ERROR_FAILURE;
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PRUint32 count;
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nodeList->GetLength(&count);
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PR_ASSERT(count==1);
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nsCOMPtr<nsIDOMNode> domNode;
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result = nodeList->Item(0, getter_AddRefs(domNode));
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if (NS_FAILED(result) || !domNode)
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return NS_ERROR_FAILURE;
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mDOMIFrameElement = do_QueryInterface(domNode);
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if (!mDOMIFrameElement)
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return NS_ERROR_FAILURE;
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// Ensure that it is indeed an IFRAME element
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nsAutoString tagName;
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result = mDOMIFrameElement->GetTagName(tagName);
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if (NS_FAILED(result))
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return NS_ERROR_FAILURE;
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if (!tagName.EqualsIgnoreCase("iframe"))
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return NS_ERROR_FAILURE;
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if (mMaxResizeHeight > 0) {
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// Set initial IFRAME size to be as wide as the window, but very short
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nsAutoString attWidth = "width";
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nsAutoString valWidth = "100%";
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mDOMIFrameElement->SetAttribute(attWidth,valWidth);
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nsAutoString attHeight = "height";
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nsAutoString valHeight = "10";
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mDOMIFrameElement->SetAttribute(attHeight,valHeight);
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}
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// Get inner DOM window by looking up the frames list
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nsCOMPtr<nsIDOMWindow> innerDOMWindow;
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result = mozXMLTermUtils::GetInnerDOMWindow(aDOMWindow, innerFrameName,
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getter_AddRefs(innerDOMWindow));
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if (NS_FAILED(result) || !innerDOMWindow)
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return NS_ERROR_FAILURE;
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mDOMWindow = innerDOMWindow;
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} else {
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// Open stream in current frame
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mDOMIFrameElement = nsnull;
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mDOMWindow = aDOMWindow;
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}
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// Get webshell for DOM window
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nsCOMPtr<nsIWebShell> webShell;
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result = mozXMLTermUtils::ConvertDOMWindowToWebShell(mDOMWindow,
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getter_AddRefs(webShell));
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if (NS_FAILED(result) || !webShell)
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return NS_ERROR_FAILURE;
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NS_WITH_SERVICE(nsIIOService, ioService, kIOServiceCID, &result);
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if (NS_FAILED(result))
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return result;
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nsCOMPtr<nsIInputStream> inputStream = this;
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nsCOMPtr<nsIURI> uri;
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result = NS_NewURI(getter_AddRefs(uri), contentURL, nsnull);
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if (NS_FAILED(result))
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return result;
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result = NS_NewLoadGroup(nsnull, nsnull, nsnull, getter_AddRefs(mLoadGroup));
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if (NS_FAILED(result))
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return result;
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PRInt32 contentLength = 1024; // ??? What's this length
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result = ioService->NewInputStreamChannel(uri, contentType, contentLength,
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inputStream, mLoadGroup, nsnull,
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getter_AddRefs(mChannel));
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if (NS_FAILED(result))
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return result;
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// Determine Class ID for viewing specified mimetype
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nsCID classID;
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static const char command[] = "view";
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nsCAutoString progID = NS_DOCUMENT_LOADER_FACTORY_PROGID_PREFIX;
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progID += command;
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progID += "/";
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progID += contentType;
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result = nsComponentManager::ProgIDToCLSID(progID.GetBuffer(),
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&classID);
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if (NS_FAILED(result))
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return result;
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nsCOMPtr<nsIDocumentLoaderFactory> docLoaderFactory;
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result = nsComponentManager::CreateInstance(classID, nsnull,
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NS_GET_IID(nsIDocumentLoaderFactory),
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getter_AddRefs(docLoaderFactory));
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if (NS_FAILED(result))
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return result;
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nsCOMPtr<nsIContentViewer> contentViewer;
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result = docLoaderFactory->CreateInstance(command,
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mChannel,
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mLoadGroup,
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contentType,
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webShell,
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nsnull,
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getter_AddRefs(mStreamListener),
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getter_AddRefs(contentViewer) );
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if (NS_FAILED(result))
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return result;
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nsCOMPtr<nsIContentViewerContainer> contViewContainer =
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do_QueryInterface(webShell);
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result = contentViewer->SetContainer(contViewContainer);
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if (NS_FAILED(result))
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return result;
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result = webShell->Embed(contentViewer, command, (nsISupports*) nsnull);
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if (NS_FAILED(result))
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return result;
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result = mStreamListener->OnStartRequest(mChannel, mContext);
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if (NS_FAILED(result))
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return result;
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XMLT_LOG(mozXMLTermStream::Open,21,("returning\n"));
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return NS_OK;
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}
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// nsIBaseStream interface
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NS_IMETHODIMP mozXMLTermStream::Close(void)
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{
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nsresult result;
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XMLT_LOG(mozXMLTermStream::Close,20,("\n"));
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mUTF8Buffer = "";
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mUTF8Offset = 0;
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PRUint32 sourceOffset = 0;
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PRUint32 count = 0;
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result = mStreamListener->OnDataAvailable(mChannel, mContext,
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this, sourceOffset, count);
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if (NS_FAILED(result))
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return result;
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nsresult status = NS_OK;
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nsAutoString errorMsg = "";
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result = mStreamListener->OnStopRequest(mChannel, mContext,
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status, errorMsg.GetUnicode());
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if (NS_FAILED(result))
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return result;
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if (mMaxResizeHeight && mDOMIFrameElement) {
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// Size frame to content
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result = SizeToContentHeight(mMaxResizeHeight);
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}
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mMaxResizeHeight = 0;
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// Release interfaces etc
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mDOMWindow = nsnull;
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mDOMIFrameElement = nsnull;
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mContext = nsnull;
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mLoadGroup = nsnull;
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mChannel = nsnull;
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mStreamListener = nsnull;
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return NS_OK;
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}
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/** Adjusts height of frame displaying stream to fit content
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* @param maxHeight maximum height of resized frame (pixels)
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* (zero value implies no maximum)
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*/
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NS_IMETHODIMP mozXMLTermStream::SizeToContentHeight(PRInt32 maxHeight)
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{
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nsresult result;
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// Get webshell
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nsCOMPtr<nsIWebShell> webShell;
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result = mozXMLTermUtils::ConvertDOMWindowToWebShell(mDOMWindow,
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getter_AddRefs(webShell));
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if (NS_FAILED(result) || !webShell)
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return NS_ERROR_FAILURE;
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// Get pres context
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nsCOMPtr<nsIPresContext> presContext;
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result = mozXMLTermUtils::GetWebShellPresContext(webShell,
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getter_AddRefs(presContext));
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if (NS_FAILED(result) || !presContext)
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return NS_ERROR_FAILURE;
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// Get scrollable view
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nsCOMPtr<nsIScrollableView> scrollableView;
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result = mozXMLTermUtils::GetPresContextScrollableView(presContext,
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getter_AddRefs(scrollableView));
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if (NS_FAILED(result) || !scrollableView)
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return NS_ERROR_FAILURE;
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// Get device context
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nsCOMPtr<nsIDeviceContext> deviceContext;
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result = mozXMLTermUtils::GetPresContextDeviceContext(presContext,
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getter_AddRefs(deviceContext));
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if (NS_FAILED(result) || !deviceContext)
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return NS_ERROR_FAILURE;
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// Determine twips to pixels conversion factor
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float pixelScale;
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presContext->GetTwipsToPixels(&pixelScale);
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// Get scrollbar dimensions in pixels
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float sbWidth, sbHeight;
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deviceContext->GetScrollBarDimensions(sbWidth, sbHeight);
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PRInt32 scrollBarWidth = PRInt32(sbWidth*pixelScale);
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PRInt32 scrollBarHeight = PRInt32(sbHeight*pixelScale);
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// Determine webshell size in pixels
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PRInt32 shellX, shellY, shellWidth, shellHeight;
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result = webShell->GetBounds(shellX, shellY, shellWidth, shellHeight);
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// Determine page size in pixels
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nscoord contX, contY;
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scrollableView->GetContainerSize(&contX, &contY);
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PRInt32 pageWidth, pageHeight;
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pageWidth = PRInt32((float)contX*pixelScale);
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pageHeight = PRInt32((float)contY*pixelScale);
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printf("mozXMLTermStream::SizeToContentHeight: scrollbar %d, %d\n",
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scrollBarWidth, scrollBarHeight);
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printf("mozXMLTermStream::SizeToContentHeight: shell %d, %d\n",
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shellWidth, shellHeight);
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printf("mozXMLTermStream::SizeToContentHeight: page %d, %d, %e\n",
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pageWidth, pageHeight, pixelScale);
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if ((pageHeight > shellHeight) || (pageWidth > shellWidth)) {
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// Page larger than webshell
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nsAutoString attHeight = "height";
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nsAutoString attWidth = "width";
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nsAutoString attValue = "";
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PRInt32 newPageHeight = pageHeight;
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PRInt32 excessWidth = (pageWidth+scrollBarWidth - shellWidth);
|
||
|
|
||
|
printf("mozXMLTermStream::SizeToContentHeight: excessWidth %d\n",
|
||
|
excessWidth);
|
||
|
|
||
|
if (excessWidth > 0) {
|
||
|
// Widen IFRAME beyond page width by scrollbar width
|
||
|
attValue = "";
|
||
|
attValue.Append(shellWidth+scrollBarWidth);
|
||
|
mDOMIFrameElement->SetAttribute(attWidth,attValue);
|
||
|
|
||
|
// Recompute page dimensions
|
||
|
scrollableView->GetContainerSize(&contX, &contY);
|
||
|
pageWidth = PRInt32((float)contX*pixelScale);
|
||
|
pageHeight = PRInt32((float)contY*pixelScale);
|
||
|
|
||
|
newPageHeight = pageHeight;
|
||
|
if (excessWidth > scrollBarWidth)
|
||
|
newPageHeight += scrollBarHeight;
|
||
|
|
||
|
printf("mozXMLTermStream::SizeToContentHeight: page2 %d, %d, %d\n",
|
||
|
pageWidth, pageHeight, newPageHeight);
|
||
|
|
||
|
// Reset IFRAME width
|
||
|
attValue = "";
|
||
|
attValue.Append(shellWidth);
|
||
|
mDOMIFrameElement->SetAttribute(attWidth,attValue);
|
||
|
}
|
||
|
|
||
|
// Resize IFRAME height to match page height (subject to a maximum)
|
||
|
if (newPageHeight > maxHeight) newPageHeight = maxHeight;
|
||
|
attValue = "";
|
||
|
attValue.Append(newPageHeight);
|
||
|
mDOMIFrameElement->SetAttribute(attHeight,attValue);
|
||
|
}
|
||
|
|
||
|
return NS_OK;
|
||
|
}
|
||
|
|
||
|
|
||
|
// nsIInputStream interface
|
||
|
NS_IMETHODIMP mozXMLTermStream::Available(PRUint32 *_retval)
|
||
|
{
|
||
|
if (!_retval)
|
||
|
return NS_ERROR_NULL_POINTER;
|
||
|
|
||
|
*_retval = mUTF8Buffer.Length() - mUTF8Offset;
|
||
|
|
||
|
XMLT_LOG(mozXMLTermStream::Available,60,("retval=%d\n", *_retval));
|
||
|
|
||
|
return NS_OK;
|
||
|
}
|
||
|
|
||
|
|
||
|
NS_IMETHODIMP mozXMLTermStream::Read(char* buf, PRUint32 count,
|
||
|
PRUint32* _retval)
|
||
|
{
|
||
|
XMLT_LOG(mozXMLTermStream::Read,60,("count=%d\n", count));
|
||
|
|
||
|
if (!_retval)
|
||
|
return NS_ERROR_NULL_POINTER;
|
||
|
|
||
|
PR_ASSERT(mUTF8Buffer.Length() >= mUTF8Offset);
|
||
|
|
||
|
PRUint32 remCount = mUTF8Buffer.Length() - mUTF8Offset;
|
||
|
|
||
|
if (remCount == 0) {
|
||
|
// Empty buffer
|
||
|
*_retval = 0;
|
||
|
return NS_OK;
|
||
|
}
|
||
|
|
||
|
if (count >= remCount) {
|
||
|
// Return entire remaining buffer
|
||
|
*_retval = remCount;
|
||
|
|
||
|
} else {
|
||
|
// Return only portion of buffer
|
||
|
*_retval = count;
|
||
|
}
|
||
|
|
||
|
// Copy portion of string
|
||
|
mUTF8Buffer.ToCString(buf, *_retval, mUTF8Offset);
|
||
|
|
||
|
mUTF8Offset += *_retval;
|
||
|
|
||
|
XMLT_LOG(mozXMLTermStream::Read,61,("*retval=%d\n", *_retval));
|
||
|
|
||
|
return NS_OK;
|
||
|
}
|
||
|
|
||
|
|
||
|
/** Write Unicode string to stream (blocks until write is completed)
|
||
|
* @param buf string to write
|
||
|
* @return NS_OK on success
|
||
|
*/
|
||
|
NS_IMETHODIMP mozXMLTermStream::Write(const PRUnichar* buf)
|
||
|
{
|
||
|
nsresult result;
|
||
|
|
||
|
XMLT_LOG(mozXMLTermStream::Write,50,("\n"));
|
||
|
|
||
|
if (!buf)
|
||
|
return NS_ERROR_FAILURE;
|
||
|
|
||
|
nsAutoString strBuf ( buf );
|
||
|
|
||
|
// Convert Unicode string to UTF8 and store in buffer
|
||
|
char* utf8Str = strBuf.ToNewUTF8String();
|
||
|
mUTF8Buffer = utf8Str;
|
||
|
nsAllocator::Free(utf8Str);
|
||
|
|
||
|
mUTF8Offset = 0;
|
||
|
|
||
|
PRUint32 sourceOffset = 0;
|
||
|
|
||
|
while (mUTF8Offset < mUTF8Buffer.Length()) {
|
||
|
PRUint32 remCount = mUTF8Buffer.Length() - mUTF8Offset;
|
||
|
result = mStreamListener->OnDataAvailable(mChannel, mContext,
|
||
|
this, sourceOffset, remCount);
|
||
|
if (NS_FAILED(result))
|
||
|
return result;
|
||
|
}
|
||
|
|
||
|
XMLT_LOG(mozXMLTermStream::Write,51,("returning mUTF8Offset=%d\n",
|
||
|
mUTF8Offset));
|
||
|
|
||
|
return NS_OK;
|
||
|
}
|