* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
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* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* IBM Corporation.
* Portions created by the Initial Developer are Copyright (C) 2000
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* IBM Corporation
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
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* ***** END LICENSE BLOCK ***** */
#ifdef IBMBIDI
#ifndef nsBidiPresUtils_h___
#define nsBidiPresUtils_h___
#include "nsVoidArray.h"
#include "nsIFrame.h"
#include "nsBidi.h"
#include "nsBidiUtils.h"
#include "nsCOMPtr.h"
#include "nsDataHashtable.h"
/**
* A structure representing a logical position which should be resolved
* into its visual position during BiDi processing.
*/
struct nsBidiPositionResolve
{
// [in] Logical index within string.
PRInt32 logicalIndex;
// [out] Visual index within string.
// If the logical position was not found, set to kNotFound.
PRInt32 visualIndex;
// [out] Visual position of the character, from the left (on the X axis), in twips.
// Eessentially, this is the X position (relative to the rendering context) where the text was drawn + the font metric of the visual string to the left of the given logical position.
// If the logical position was not found, set to kNotFound.
PRInt32 visualLeftTwips;
};
class nsBidiPresUtils {
public:
nsBidiPresUtils();
~nsBidiPresUtils();
PRBool IsSuccessful(void) const;
/**
* Make Bidi engine calculate the embedding levels of the frames that are
* descendants of a given block frame.
*
* @param aPresContext The presContext
* @param aBlockFrame The block frame
* @param aFirstChild The first child frame of aBlockFrame
* @param aForceReflow [OUT] Set if we delete frames and will need to
* reflow the block frame
* @param aIsVisualFormControl [IN] Set if we are in a form control on a
* visual page.
* @see nsHTMLReflowState::IsBidiFormControl
*
* @lina 06/18/2000
*/
nsresult Resolve(nsPresContext* aPresContext,
nsIFrame* aBlockFrame,
nsIFrame* aFirstChild,
PRBool& aForceReflow,
PRBool aIsVisualFormControl);
/**
* Reorder this line using Bidi engine.
* Update frame array, following the new visual sequence.
*
* @lina 05/02/2000
*/
void ReorderFrames(nsPresContext* aPresContext,
nsIRenderingContext* aRendContext,
nsIFrame* aFirstChild,
nsIFrame* aNextInFlow,
PRInt32 aChildCount);
/**
* Format Unicode text, taking into account bidi capabilities
* of the platform. The formatting includes: reordering, Arabic shaping,
* symmetric and numeric swapping, removing control characters.
