LCOV - code coverage report
Current view: directory - content/events/src - nsContentEventHandler.h (source / functions) Found Hit Coverage
Test: app.info Lines: 1 0 0.0 %
Date: 2012-06-02 Functions: 1 0 0.0 %

       1                 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2                 : /* ***** BEGIN LICENSE BLOCK *****
       3                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       4                 :  *
       5                 :  * The contents of this file are subject to the Mozilla Public License Version
       6                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       7                 :  * the License. You may obtain a copy of the License at
       8                 :  * http://www.mozilla.org/MPL/
       9                 :  *
      10                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      11                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      12                 :  * for the specific language governing rights and limitations under the
      13                 :  * License.
      14                 :  *
      15                 :  * The Original Code is mozilla.org code.
      16                 :  *
      17                 :  * The Initial Developer of the Original Code is
      18                 :  * Mozilla Japan.
      19                 :  * Portions created by the Initial Developer are Copyright (C) 2008
      20                 :  * the Initial Developer. All Rights Reserved.
      21                 :  *
      22                 :  * Contributor(s):
      23                 :  *   Masayuki Nakano <masayuki@d-toybox.com>
      24                 :  *   Ningjie Chen <chenn@email.uc.edu>
      25                 :  *
      26                 :  * Alternatively, the contents of this file may be used under the terms of
      27                 :  * either of the GNU General Public License Version 2 or later (the "GPL"),
      28                 :  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      29                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      30                 :  * of those above. If you wish to allow use of your version of this file only
      31                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      32                 :  * use your version of this file under the terms of the MPL, indicate your
      33                 :  * decision by deleting the provisions above and replace them with the notice
      34                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      35                 :  * the provisions above, a recipient may use your version of this file under
      36                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      37                 :  *
      38                 :  * ***** END LICENSE BLOCK ***** */
      39                 : 
      40                 : #ifndef nsContentEventHandler_h__
      41                 : #define nsContentEventHandler_h__
      42                 : 
      43                 : #include "nscore.h"
      44                 : #include "nsCOMPtr.h"
      45                 : 
      46                 : #include "nsISelection.h"
      47                 : #include "nsRange.h"
      48                 : #include "nsIContent.h"
      49                 : #include "nsIDOMTreeWalker.h"
      50                 : 
      51                 : class nsPresContext;
      52                 : class nsIPresShell;
      53                 : class nsQueryContentEvent;
      54                 : class nsSelectionEvent;
      55                 : class nsCaret;
      56                 : struct nsRect;
      57                 : 
      58                 : /*
      59                 :  * Query Content Event Handler
      60                 :  *   nsContentEventHandler is a helper class for nsEventStateManager.
      61                 :  *   The platforms request some content informations, e.g., the selected text,
      62                 :  *   the offset of the selected text and the text for specified range.
      63                 :  *   This class answers to NS_QUERY_* events from actual contents.
      64                 :  */
      65                 : 
      66               0 : class NS_STACK_CLASS nsContentEventHandler {
      67                 : public:
      68                 :   nsContentEventHandler(nsPresContext *aPresContext);
      69                 : 
      70                 :   // NS_QUERY_SELECTED_TEXT event handler
      71                 :   nsresult OnQuerySelectedText(nsQueryContentEvent* aEvent);
      72                 :   // NS_QUERY_TEXT_CONTENT event handler
      73                 :   nsresult OnQueryTextContent(nsQueryContentEvent* aEvent);
      74                 :   // NS_QUERY_CARET_RECT event handler
      75                 :   nsresult OnQueryCaretRect(nsQueryContentEvent* aEvent);
      76                 :   // NS_QUERY_TEXT_RECT event handler
      77                 :   nsresult OnQueryTextRect(nsQueryContentEvent* aEvent);
      78                 :   // NS_QUERY_EDITOR_RECT event handler
      79                 :   nsresult OnQueryEditorRect(nsQueryContentEvent* aEvent);
      80                 :   // NS_QUERY_CONTENT_STATE event handler
      81                 :   nsresult OnQueryContentState(nsQueryContentEvent* aEvent);
      82                 :   // NS_QUERY_SELECTION_AS_TRANSFERABLE event handler
      83                 :   nsresult OnQuerySelectionAsTransferable(nsQueryContentEvent* aEvent);
      84                 :   // NS_QUERY_CHARACTER_AT_POINT event handler
      85                 :   nsresult OnQueryCharacterAtPoint(nsQueryContentEvent* aEvent);
      86                 :   // NS_QUERY_DOM_WIDGET_HITTEST event handler
      87                 :   nsresult OnQueryDOMWidgetHittest(nsQueryContentEvent* aEvent);
      88                 : 
      89                 :   // NS_SELECTION_* event
      90                 :   nsresult OnSelectionEvent(nsSelectionEvent* aEvent);
      91                 : 
      92                 : protected:
      93                 :   nsPresContext* mPresContext;
      94                 :   nsCOMPtr<nsIPresShell> mPresShell;
      95                 :   nsCOMPtr<nsISelection> mSelection;
      96                 :   nsRefPtr<nsRange> mFirstSelectedRange;
      97                 :   nsCOMPtr<nsIContent> mRootContent;
      98                 : 
      99                 :   nsresult Init(nsQueryContentEvent* aEvent);
     100                 :   nsresult Init(nsSelectionEvent* aEvent);
     101                 : 
     102                 :   // InitCommon() is called from each Init().
     103                 :   nsresult InitCommon();
     104                 : 
     105                 : public:
     106                 :   // FlatText means the text that is generated from DOM tree. The BR elements
     107                 :   // are replaced to native linefeeds. Other elements are ignored.
     108                 : 
     109                 :   // Get the offset in FlatText of the range. (also used by nsIMEStateManager)
     110                 :   static nsresult GetFlatTextOffsetOfRange(nsIContent* aRootContent,
     111                 :                                            nsINode* aNode,
     112                 :                                            PRInt32 aNodeOffset,
     113                 :                                            PRUint32* aOffset);
     114                 :   static nsresult GetFlatTextOffsetOfRange(nsIContent* aRootContent,
     115                 :                                            nsRange* aRange,
     116                 :                                            PRUint32* aOffset);
     117                 : protected:
     118                 :   // Make the DOM range from the offset of FlatText and the text length.
     119                 :   // If aExpandToClusterBoundaries is true, the start offset and the end one are
     120                 :   // expanded to nearest cluster boundaries.
     121                 :   nsresult SetRangeFromFlatTextOffset(nsRange* aRange,
     122                 :                                       PRUint32 aNativeOffset,
     123                 :                                       PRUint32 aNativeLength,
     124                 :                                       bool aExpandToClusterBoundaries);
     125                 :   // Find the first textframe for the range, and get the start offset in
     126                 :   // the frame.
     127                 :   nsresult GetStartFrameAndOffset(nsRange* aRange,
     128                 :                                   nsIFrame** aFrame,
     129                 :                                   PRInt32* aOffsetInFrame);
     130                 :   // Convert the frame relative offset to the root view relative offset.
     131                 :   nsresult ConvertToRootViewRelativeOffset(nsIFrame* aFrame,
     132                 :                                            nsRect& aRect);
     133                 :   // Expand aXPOffset to the nearest offset in cluster boundary. aForward is
     134                 :   // true, it is expanded to forward.
     135                 :   nsresult ExpandToClusterBoundary(nsIContent* aContent, bool aForward,
     136                 :                                    PRUint32* aXPOffset);
     137                 : };
     138                 : 
     139                 : #endif // nsContentEventHandler_h__

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