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gecko-dev/editor/public/nsITableEditor.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape 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/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License 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 Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*/
#ifndef nsITableEditor_h__
#define nsITableEditor_h__
// Wrapping includes can speed up compiles (see "Large Scale C++ Software Design")
#ifndef nsCOMPtr_h___
#include "nsCOMPtr.h"
#endif
#ifndef nsIDOMElement_h__
#include "nsIDOMElement.h"
// for |nsIDOMElement| because an |nsCOMPtr<nsIDOMElement>&| is used, below
#endif
#ifndef nsIDOMRange_h__
#include "nsIDOMRange.h"
#endif
#define NS_ITABLEEDITOR_IID \
{ /* 4805e684-49b9-11d3-9ce4-ed60bd6cb5bc} */ \
0x4805e684, 0x49b9, 0x11d3, \
{ 0x9c, 0xe4, 0xed, 0x60, 0xbd, 0x6c, 0xb5, 0xbc } }
class nsITableEditor : public nsISupports
{
public:
static const nsIID& GetIID() { static nsIID iid = NS_ITABLEEDITOR_IID; return iid; }
/* ------------ Table editing Methods -------------- */
/** Insert table methods
* Insert relative to the selected cell or the
* cell enclosing the selection anchor
* The selection is collapsed and is left in the new cell
* at the same row,col location as the original anchor cell
*
* @param aNumber Number of items to insert
* @param aAfter If TRUE, insert after the current cell,
* else insert before current cell
*/
NS_IMETHOD InsertTableCell(PRInt32 aNumber, PRBool aAfter)=0;
NS_IMETHOD InsertTableColumn(PRInt32 aNumber, PRBool aAfter)=0;
NS_IMETHOD InsertTableRow(PRInt32 aNumber, PRBool aAfter)=0;
/** Delete table methods
* Delete starting at the selected cell or the
* cell (or table) enclosing the selection anchor
* The selection is collapsed and is left in the
* cell at the same row,col location as
* the previous selection anchor, if possible,
* else in the closest neigboring cell
*
* @param aNumber Number of items to insert/delete
*/
NS_IMETHOD DeleteTable()=0;
NS_IMETHOD DeleteTableCell(PRInt32 aNumber)=0;
NS_IMETHOD DeleteTableCellContents()=0;
NS_IMETHOD DeleteTableColumn(PRInt32 aNumber)=0;
NS_IMETHOD DeleteTableRow(PRInt32 aNumber)=0;
/** Table Selection methods
* Selecting a row or column actually
* selects all cells (not TR in the case of rows)
*/
NS_IMETHOD SelectTableCell()=0;
/** Select a rectangular block of cells:
* all cells falling within the row/column index of aStartCell
* to through the row/column index of the aEndCell
* aStartCell can be any location relative to aEndCell,
* as long as they are in the same table
* @param aStartCell starting cell in block
* @param aEndCell ending cell in block
*/
NS_IMETHOD SelectBlockOfCells(nsIDOMElement *aStartCell, nsIDOMElement *aEndCell)=0;
NS_IMETHOD SelectTableRow()=0;
NS_IMETHOD SelectTableColumn()=0;
NS_IMETHOD SelectTable()=0;
NS_IMETHOD SelectAllTableCells()=0;
/** Merges contents of all selected cells
* for selected cells that are adjacent,
* this will result in a larger cell with appropriate
* rowspan and colspan, and original cells are deleted
* The resulting cell is in the location of the
* cell at the upper-left corner of the adjacent
* block of selected cells
* Non-adjacent cells are not deleted,
* but their contents are still moved
* to the upper-left cell
* If there are no selected cells,
* and selection or caret is in a cell,
* that cell and the one to the right
* are merged
*/
NS_IMETHOD JoinTableCells()=0;
/** Split a cell that has rowspan and/or colspan > 0
* into cells such that all new cells have
* rowspan = 1 and colspan = 1
* All of the contents are not touched --
* they will appear to be in the upper-left cell
*/
NS_IMETHOD SplitTableCell()=0;
/** Scan through all rows and add cells as needed so
* all locations in the cellmap are occupied.
* Used after inserting single cells or pasting
* a collection of cells that extend past the
* previous size of the table
* If aTable is null, it uses table enclosing the selection anchor
* This doesn't doesn't change the selection,
* thus it can be used to fixup all tables
* in a page independant of the selection
*/
NS_IMETHOD NormalizeTable(nsIDOMElement *aTable)=0;
/** Get the row an column index from the layout's cellmap
* If aTable is null, it will try to find enclosing table of selection ancho
*
*/
NS_IMETHOD GetCellIndexes(nsIDOMElement *aCell, PRInt32& aRowIndex, PRInt32& aColIndex)=0;
/** Get the number of rows and columns in a table from the layout's cellmap
* If aTable is null, it will try to find enclosing table of selection ancho
* Note that all rows in table will not have this many because of
* ROWSPAN effects or if table is not "rectangular" (has short rows)
*/
NS_IMETHOD GetTableSize(nsIDOMElement *aTable, PRInt32& aRowCount, PRInt32& aColCount)=0;
/** Get a cell element at cellmap grid coordinates
* A cell that spans across multiple cellmap locations will
* be returned multiple times, once for each location it occupies
*
* @param aTable A table in the document
* @param aRowIndex, aColIndex The 0-based cellmap indexes
*
* Returns NS_EDITOR_ELEMENT_NOT_FOUND if an element is not found (passes NS_SUCCEEDED macro)
* You can scan for all cells in a row or column
* by iterating through the appropriate indexes
* until the returned aCell is null
*/
NS_IMETHOD GetCellAt(nsIDOMElement* aTable, PRInt32 aRowIndex, PRInt32 aColIndex, nsIDOMElement* &aCell)=0;
/** Get a cell at cellmap grid coordinates and associated data
* A cell that spans across multiple cellmap locations will
* be returned multiple times, once for each location it occupies
* Examine the returned aStartRowIndex and aStartColIndex to see
* if it is in the same layout column or layout row:
* A "layout row" is all cells sharing the same top edge
* A "layout column" is all cells sharing the same left edge
* This is important to determine what to do when inserting or deleting a column or row
*
* @param aTable A table in the document
* @param aRowIndex, aColIndex The 0-based cellmap indexes
* returns values:
* @param aCell The cell at this cellmap location
* @param aStartRowIndex The row index where cell starts
* @param aStartColIndex The col index where cell starts
* @param aRowSpan May be 0 (to span down entire table) or number of cells spanned
* @param aColSpan May be 0 (to span across entire table) or number of cells spanned
* @param aActualRowSpan The actual number of cellmap locations (rows) spanned by the cell
* @param aActualColSpan The actual number of cellmap locations (columns) spanned by the cell
* @param aIsSelected
* @param
*
* Returns NS_EDITOR_ELEMENT_NOT_FOUND if a cell is not found (passes NS_SUCCEEDED macro)
*/
NS_IMETHOD GetCellDataAt(nsIDOMElement* aTable, PRInt32 aRowIndex, PRInt32 aColIndex, nsIDOMElement* &aCell,
PRInt32& aStartRowIndex, PRInt32& aStartColIndex,
PRInt32& aRowSpan, PRInt32& aColSpan,
PRInt32& aActualRowSpan, PRInt32& aActualColSpan,
PRBool& aIsSelected)=0;
/** Get the first row element in a table
*
* @param aTableElement Any TABLE or child-of-table element in the document
* @param aRowIndex The 0-based index of the row
*
* Returns:
* @param aRow The row at the requested index
* Returns null if there are no rows in table
* Returns NS_EDITOR_ELEMENT_NOT_FOUND if an element is not found (passes NS_SUCCEEDED macro)
*/
NS_IMETHOD GetFirstRow(nsIDOMElement* aTableElement, nsIDOMElement* &aRow)=0;
/** Get the next row element starting the search from aTableElement
*
* @param aTableElement Any TR or child-of-TR element in the document
*
* Returns:
* @param aRow The row to start search from
* and the row returned from the search
* Returns null if there isn't another row
* Returns NS_EDITOR_ELEMENT_NOT_FOUND if an element is not found (passes NS_SUCCEEDED macro)
*/
NS_IMETHOD GetNextRow(nsIDOMElement* aTableElement, nsIDOMElement* &aRow)=0;
/** Preferred direction to search for neighboring cell
* when trying to locate a cell to place caret in after
* a table editing action.
* Used for aDirection param in SetCaretAfterTableEdit
*/
enum {
eNoSearch,
ePreviousColumn,
ePreviousRow
};
/** Reset a collapsed selection (the caret) after table editing
*
* @param aTable A table in the document
* @param aRow The row ...
* @param aCol ... and column defining the cell
* where we will try to place the caret
* @param aDirection If cell at (aCol, aRow) is not found,
* search for previous cell in the same
* column (aPreviousColumn) or row (ePreviousRow)
* or don't search for another cell (aNoSearch)
* If no cell is found, caret is place just before table;
* and if that fails, at beginning of document.
* Thus we generally don't worry about the return value
* and can use the nsSetCaretAfterTableEdit stack-based
* object to insure we reset the caret in a table-editing method.
*/
NS_IMETHOD SetCaretAfterTableEdit(nsIDOMElement* aTable, PRInt32 aRow, PRInt32 aCol, PRInt32 aDirection)=0;
/** Examine the current selection and find
* a selected TABLE, TD or TH, or TR element.
* or return the parent TD or TH if selection is inside a table cell
* Returns null if no table element is found.
*
* @param aTableElement The table element (table, row, or cell) returned
* @param aTagName The tagname of returned element
* Note that "td" will be returned if name is actually "th"
* @param aSelectedCount How many table elements were selected
* This tells us if we have multiple cells selected
* (0 if element is a parent cell of selection)
*
* Returns NS_EDITOR_ELEMENT_NOT_FOUND if an element is not found (passes NS_SUCCEEDED macro)
*/
NS_IMETHOD GetSelectedOrParentTableElement(nsIDOMElement* &aTableElement, nsString& aTagName, PRInt32 &aSelectedCount)=0;
/** Generally used after GetSelectedOrParentTableElement
* to test if selected cells are complete rows or columns
*
* @param aElement Any table or cell element or any element inside a table
* Used to get enclosing table.
* If null, selection's anchorNode is used
*
* @param aSelectionType Returns:
* 0 aCellElement was not a cell (returned result = NS_ERROR_FAILURE)
* TABLESELECTION_CELL There are 1 or more cells selected
* but complete rows or columns are not selected
* TABLESELECTION_ROW All cells are in 1 or more rows
* and in each row, all cells selected
* Note: This is the value if all rows (thus all cells) are selected
* TABLESELECTION_COLUMN All cells are in 1 or more columns
* and in each column, all cells are selected
*/
NS_IMETHOD GetSelectedCellsType(nsIDOMElement *aElement, PRUint32 &aSelectionType)=0;
/** Get first selected element from first selection range.
* Assumes cell-selection model where each cell
* is in a separate range (selection parent node is table row)
* @param aCell Selected cell or null if ranges don't contain cell selections
* @param aRange Optional: if not null, return the selection range
* associated with the cell
* Returns NS_EDITOR_ELEMENT_NOT_FOUND if an element is not found (passes NS_SUCCEEDED macro)
*/
NS_IMETHOD GetFirstSelectedCell(nsIDOMElement **aCell, nsIDOMRange **aRange)=0;
/** Get next selected cell element from first selection range.
* Assumes cell-selection model where each cell
* is in a separate range (selection parent node is table row)
* Always call GetFirstSelectedCell() to initialize stored index of "next" cell
* @param aCell Selected cell or null if no more selected cells
* or ranges don't contain cell selections
* @param aRange Optional: if not null, return the selection range
* associated with the cell
*/
NS_IMETHOD GetNextSelectedCell(nsIDOMElement **aCell, nsIDOMRange **aRange)=0;
};
#endif // nsITableEditor_h__
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