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Sweden-Number/dlls/riched20/table.c

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/*
* RichEdit functions dealing with on tables
*
* Copyright 2008 by Dylan Smith
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
/*
* The implementation of tables differs greatly between version 3.0
* (in riched20.dll) and version 4.1 (in msftedit.dll) of richedit controls.
* Currently Wine is not distinguishing between version 3.0 and version 4.1,
* so v4.1 is assumed unless v1.0 is being emulated (i.e. riched32.dll is used).
* If this lack of distinction causes a bug in a Windows application, then Wine
* will need to start making this distinction.
*
* Richedit version 1.0 - 3.0:
* Tables are implemented in these versions using tabs at the end of cells,
* and tab stops to position the cells. The paragraph format flag PFE_TABLE
* will indicate that the paragraph is a table row. Note that in this
* implementation there is one paragraph per table row.
*
* Richedit version 4.1:
* Tables are implemented such that cells can contain multiple paragraphs,
* each with its own paragraph format, and cells may even contain tables
* nested within the cell.
*
* There is also a paragraph at the start of each table row that contains
* the rows paragraph format (e.g. to change the row alignment to row), and a
* paragraph at the end of the table row with the PFE_TABLEROWDELIMITER flag
* set. The paragraphs at the start and end of the table row should always be
* empty, but should have a length of 2.
*
* Wine implements this using display items (ME_DisplayItem) with a type of
* diCell. These cell display items store the cell properties, and are
* inserted into the editors linked list before each cell, and at the end of
* the last cell. The cell display item for a cell comes before the paragraphs
* for the cell, but the last cell display item refers to no cell, so it is
* just a delimiter.
*/
#include "editor.h"
#include "rtf.h"
WINE_DEFAULT_DEBUG_CHANNEL(richedit_lists);
static const WCHAR cr_lf[] = {'\r', '\n', 0};
static ME_Paragraph* table_insert_end_para( ME_TextEditor *editor, ME_Cursor *cursor,
const WCHAR *eol_str, int eol_len, int para_flags )
{
ME_Style *style = style_get_insert_style( editor, cursor );
ME_Paragraph *para;
if (cursor->nOffset) run_split( editor, cursor );
para = para_split( editor, &cursor->pRun->member.run, style, eol_str, eol_len, para_flags );
ME_ReleaseStyle( style );
cursor->pPara = para_get_di( para );
cursor->pRun = run_get_di( para_first_run( para ) );
return para;
}
ME_DisplayItem* ME_InsertTableRowStartFromCursor(ME_TextEditor *editor)
{
ME_Paragraph *para;
para = table_insert_end_para( editor, editor->pCursors, cr_lf, 2, MEPF_ROWSTART );
return para_get_di( para_prev( para ) );
}
ME_DisplayItem* ME_InsertTableRowStartAtParagraph(ME_TextEditor *editor,
ME_DisplayItem *para)
{
ME_DisplayItem *prev_para, *end_para;
ME_Cursor savedCursor = editor->pCursors[0];
ME_DisplayItem *startRowPara;
editor->pCursors[0].pPara = para;
editor->pCursors[0].pRun = ME_FindItemFwd(para, diRun);
editor->pCursors[0].nOffset = 0;
editor->pCursors[1] = editor->pCursors[0];
startRowPara = ME_InsertTableRowStartFromCursor(editor);
savedCursor.pPara = ME_GetParagraph(savedCursor.pRun);
editor->pCursors[0] = savedCursor;
editor->pCursors[1] = editor->pCursors[0];
end_para = editor->pCursors[0].pPara->member.para.next_para;
prev_para = startRowPara->member.para.next_para;
para = prev_para->member.para.next_para;
while (para != end_para)
{
para->member.para.pCell = prev_para->member.para.pCell;
para->member.para.nFlags |= MEPF_CELL;
para->member.para.nFlags &= ~(MEPF_ROWSTART|MEPF_ROWEND);
para->member.para.fmt.dwMask |= PFM_TABLE|PFM_TABLEROWDELIMITER;
para->member.para.fmt.wEffects |= PFE_TABLE;
para->member.para.fmt.wEffects &= ~PFE_TABLEROWDELIMITER;
prev_para = para;
para = para->member.para.next_para;
}
return startRowPara;
}
/* Inserts a diCell and starts a new paragraph for the next cell.
*
* Returns the first paragraph of the new cell. */
ME_DisplayItem* ME_InsertTableCellFromCursor(ME_TextEditor *editor)
{
ME_Paragraph *para;
WCHAR tab = '\t';
para = table_insert_end_para( editor, editor->pCursors, &tab, 1, MEPF_CELL );
return para_get_di( para );
}
ME_DisplayItem* ME_InsertTableRowEndFromCursor(ME_TextEditor *editor)
{
ME_Paragraph *para;
para = table_insert_end_para( editor, editor->pCursors, cr_lf, 2, MEPF_ROWEND );
return para_get_di( para_prev( para ) );
}
ME_Paragraph* table_row_end( ME_Paragraph *para )
{
ME_DisplayItem *cell;
assert( para );
if (para->nFlags & MEPF_ROWEND) return para;
if (para->nFlags & MEPF_ROWSTART) para = para_next( para );
cell = para->pCell;
assert(cell && cell->type == diCell);
while (cell->member.cell.next_cell)
cell = cell->member.cell.next_cell;
para = &ME_FindItemFwd( cell, diParagraph )->member.para;
assert( para && para->nFlags & MEPF_ROWEND );
return para;
}
ME_Paragraph* table_row_start( ME_Paragraph *para )
{
ME_DisplayItem *cell;
assert( para );
if (para->nFlags & MEPF_ROWSTART) return para;
if (para->nFlags & MEPF_ROWEND) para = para_prev( para );
cell = para->pCell;
assert(cell && cell->type == diCell);
while (cell->member.cell.prev_cell)
cell = cell->member.cell.prev_cell;
para = &ME_FindItemBack( cell, diParagraph )->member.para;
assert( para && para->nFlags & MEPF_ROWSTART );
return para;
}
ME_Paragraph* table_outer_para( ME_Paragraph *para )
{
if (para->nFlags & MEPF_ROWEND) para = para_prev( para );
while (para->pCell)
{
para = table_row_start( para );
if (!para->pCell) break;
para = &ME_FindItemBack( para->pCell, diParagraph )->member.para;
}
return para;
}
/* Make a bunch of assertions to make sure tables haven't been corrupted.
*
* These invariants may not hold true in the middle of streaming in rich text
* or during an undo and redo of streaming in rich text. It should be safe to
* call this method after an event is processed.
*/
void ME_CheckTablesForCorruption(ME_TextEditor *editor)
{
if(TRACE_ON(richedit_lists))
{
TRACE("---\n");
ME_DumpDocument(editor->pBuffer);
}
#ifndef NDEBUG
{
ME_DisplayItem *p, *pPrev;
pPrev = editor->pBuffer->pFirst;
p = pPrev->next;
if (!editor->bEmulateVersion10) /* v4.1 */
{
while (p->type == diParagraph)
{
assert(p->member.para.fmt.dwMask & PFM_TABLE);
assert(p->member.para.fmt.dwMask & PFM_TABLEROWDELIMITER);
if (p->member.para.pCell)
{
assert(p->member.para.nFlags & MEPF_CELL);
assert(p->member.para.fmt.wEffects & PFE_TABLE);
}
if (p->member.para.pCell != pPrev->member.para.pCell)
{
/* There must be a diCell in between the paragraphs if pCell changes. */
ME_DisplayItem *pCell = ME_FindItemBack(p, diCell);
assert(pCell);
assert(ME_FindItemBack(p, diRun) == ME_FindItemBack(pCell, diRun));
}
if (p->member.para.nFlags & MEPF_ROWEND)
{
/* ROWEND must come after a cell. */
assert(pPrev->member.para.pCell);
assert(p->member.para.pCell
== pPrev->member.para.pCell->member.cell.parent_cell);
assert(p->member.para.fmt.wEffects & PFE_TABLEROWDELIMITER);
}
else if (p->member.para.pCell)
{
assert(!(p->member.para.fmt.wEffects & PFE_TABLEROWDELIMITER));
assert(pPrev->member.para.pCell ||
pPrev->member.para.nFlags & MEPF_ROWSTART);
if (pPrev->member.para.pCell &&
!(pPrev->member.para.nFlags & MEPF_ROWSTART))
{
assert(p->member.para.pCell->member.cell.parent_cell
== pPrev->member.para.pCell->member.cell.parent_cell);
if (pPrev->member.para.pCell != p->member.para.pCell)
assert(pPrev->member.para.pCell
== p->member.para.pCell->member.cell.prev_cell);
}
}
else if (!(p->member.para.nFlags & MEPF_ROWSTART))
{
assert(!(p->member.para.fmt.wEffects & PFE_TABLEROWDELIMITER));
/* ROWSTART must be followed by a cell. */
assert(!(p->member.para.nFlags & MEPF_CELL));
/* ROWSTART must be followed by a cell. */
assert(!(pPrev->member.para.nFlags & MEPF_ROWSTART));
}
pPrev = p;
p = p->member.para.next_para;
}
} else { /* v1.0 - 3.0 */
while (p->type == diParagraph)
{
assert(!(p->member.para.nFlags & (MEPF_ROWSTART|MEPF_ROWEND|MEPF_CELL)));
assert(p->member.para.fmt.dwMask & PFM_TABLE);
assert(!(p->member.para.fmt.wEffects & PFE_TABLEROWDELIMITER));
assert(!p->member.para.pCell);
p = p->member.para.next_para;
}
return;
}
assert(p->type == diTextEnd);
assert(!pPrev->member.para.pCell);
}
#endif
}
BOOL ME_IsInTable(ME_DisplayItem *pItem)
{
PARAFORMAT2 *pFmt;
if (!pItem)
return FALSE;
if (pItem->type == diRun)
pItem = ME_GetParagraph(pItem);
if (pItem->type != diParagraph)
return FALSE;
pFmt = &pItem->member.para.fmt;
return pFmt->dwMask & PFM_TABLE && pFmt->wEffects & PFE_TABLE;
}
/* Table rows should either be deleted completely or not at all. */
void ME_ProtectPartialTableDeletion(ME_TextEditor *editor, ME_Cursor *c, int *nChars)
{
int nOfs = ME_GetCursorOfs(c);
ME_Cursor c2 = *c;
ME_DisplayItem *this_para = c->pPara;
ME_DisplayItem *end_para;
ME_MoveCursorChars(editor, &c2, *nChars, FALSE);
end_para = c2.pPara;
if (c2.pRun->member.run.nFlags & MERF_ENDPARA) {
/* End offset might be in the middle of the end paragraph run.
* If this is the case, then we need to use the next paragraph as the last
* paragraphs.
*/
int remaining = nOfs + *nChars - c2.pRun->member.run.nCharOfs
- end_para->member.para.nCharOfs;
if (remaining)
{
assert(remaining < c2.pRun->member.run.len);
end_para = end_para->member.para.next_para;
}
}
if (!editor->bEmulateVersion10) { /* v4.1 */
if (this_para->member.para.pCell != end_para->member.para.pCell ||
((this_para->member.para.nFlags|end_para->member.para.nFlags)
& (MEPF_ROWSTART|MEPF_ROWEND)))
{
while (this_para != end_para)
{
ME_DisplayItem *next_para = this_para->member.para.next_para;
BOOL bTruancateDeletion = FALSE;
if (this_para->member.para.nFlags & MEPF_ROWSTART) {
/* The following while loop assumes that next_para is MEPF_ROWSTART,
* so moving back one paragraph let's it be processed as the start
* of the row. */
next_para = this_para;
this_para = this_para->member.para.prev_para;
} else if (next_para->member.para.pCell != this_para->member.para.pCell
|| this_para->member.para.nFlags & MEPF_ROWEND)
{
/* Start of the deletion from after the start of the table row. */
bTruancateDeletion = TRUE;
}
while (!bTruancateDeletion &&
next_para->member.para.nFlags & MEPF_ROWSTART)
{
next_para = table_row_end( &next_para->member.para )->next_para;
if (next_para->member.para.nCharOfs > nOfs + *nChars)
{
/* End of deletion is not past the end of the table row. */
next_para = this_para->member.para.next_para;
/* Delete the end paragraph preceding the table row if the
* preceding table row will be empty. */
if (this_para->member.para.nCharOfs >= nOfs)
{
next_para = next_para->member.para.next_para;
}
bTruancateDeletion = TRUE;
} else {
this_para = next_para->member.para.prev_para;
}
}
if (bTruancateDeletion)
{
ME_Run *end_run = &ME_FindItemBack(next_para, diRun)->member.run;
int nCharsNew = (next_para->member.para.nCharOfs - nOfs
- end_run->len);
nCharsNew = max(nCharsNew, 0);
assert(nCharsNew <= *nChars);
*nChars = nCharsNew;
break;
}
this_para = next_para;
}
}
} else { /* v1.0 - 3.0 */
ME_DisplayItem *pRun;
int nCharsToBoundary;
if ((this_para->member.para.nCharOfs != nOfs || this_para == end_para) &&
this_para->member.para.fmt.dwMask & PFM_TABLE &&
this_para->member.para.fmt.wEffects & PFE_TABLE)
{
pRun = c->pRun;
/* Find the next tab or end paragraph to use as a delete boundary */
while (!(pRun->member.run.nFlags & (MERF_TAB|MERF_ENDPARA)))
pRun = ME_FindItemFwd(pRun, diRun);
nCharsToBoundary = pRun->member.run.nCharOfs
- c->pRun->member.run.nCharOfs
- c->nOffset;
*nChars = min(*nChars, nCharsToBoundary);
} else if (end_para->member.para.fmt.dwMask & PFM_TABLE &&
end_para->member.para.fmt.wEffects & PFE_TABLE)
{
/* The deletion starts from before the row, so don't join it with
* previous non-empty paragraphs. */
ME_DisplayItem *curPara;
pRun = NULL;
if (nOfs > this_para->member.para.nCharOfs) {
pRun = ME_FindItemBack(end_para, diRun);
curPara = end_para->member.para.prev_para;
}
if (!pRun) {
pRun = ME_FindItemFwd(end_para, diRun);
curPara = end_para;
}
if (pRun)
{
nCharsToBoundary = curPara->member.para.nCharOfs
+ pRun->member.run.nCharOfs
- nOfs;
if (nCharsToBoundary >= 0)
*nChars = min(*nChars, nCharsToBoundary);
}
}
if (*nChars < 0)
*nChars = 0;
}
}
ME_Paragraph* table_append_row( ME_TextEditor *editor, ME_Paragraph *table_row )
{
WCHAR endl = '\r', tab = '\t';
ME_Run *run;
PARAFORMAT2 *pFmt;
int i;
assert(table_row);
if (!editor->bEmulateVersion10) /* v4.1 */
{
ME_DisplayItem *insertedCell, *cell;
ME_Paragraph *para, *prev_table_end;
cell = ME_FindItemFwd( para_get_di( table_row_start( table_row ) ), diCell );
prev_table_end = table_row_end( table_row );
para = para_next( prev_table_end );
run = para_first_run( para );
editor->pCursors[0].pPara = para_get_di( para );
editor->pCursors[0].pRun = run_get_di( run );
editor->pCursors[0].nOffset = 0;
editor->pCursors[1] = editor->pCursors[0];
para = &ME_InsertTableRowStartFromCursor(editor)->member.para;
insertedCell = ME_FindItemFwd( para_get_di( para ), diCell );
/* Copy cell properties */
insertedCell->member.cell.nRightBoundary = cell->member.cell.nRightBoundary;
insertedCell->member.cell.border = cell->member.cell.border;
while (cell->member.cell.next_cell)
{
cell = cell->member.cell.next_cell;
para = &ME_InsertTableCellFromCursor( editor )->member.para;
insertedCell = ME_FindItemBack( para_get_di( para ), diCell );
/* Copy cell properties */
insertedCell->member.cell.nRightBoundary = cell->member.cell.nRightBoundary;
insertedCell->member.cell.border = cell->member.cell.border;
};
para = &ME_InsertTableRowEndFromCursor(editor)->member.para;
para->fmt = prev_table_end->fmt;
/* return the table row start for the inserted paragraph */
return para_next( &ME_FindItemFwd( cell, diParagraph )->member.para );
}
else /* v1.0 - 3.0 */
{
run = para_end_run( table_row );
pFmt = &table_row->fmt;
assert(pFmt->dwMask & PFM_TABLE && pFmt->wEffects & PFE_TABLE);
editor->pCursors[0].pPara = para_get_di( table_row );
editor->pCursors[0].pRun = run_get_di( run );
editor->pCursors[0].nOffset = 0;
editor->pCursors[1] = editor->pCursors[0];
ME_InsertTextFromCursor( editor, 0, &endl, 1, run->style );
run = &editor->pCursors[0].pRun->member.run;
for (i = 0; i < pFmt->cTabCount; i++)
ME_InsertTextFromCursor(editor, 0, &tab, 1, run->style);
return para_next( table_row );
}
}
/* Selects the next table cell or appends a new table row if at end of table */
static void ME_SelectOrInsertNextCell( ME_TextEditor *editor, ME_DisplayItem *run )
{
ME_Paragraph *para = run->member.run.para;
int i;
assert(run && run->type == diRun);
assert(ME_IsInTable(run));
if (!editor->bEmulateVersion10) /* v4.1 */
{
ME_DisplayItem *cell;
/* Get the initial cell */
if (para->nFlags & MEPF_ROWSTART) cell = para_next( para )->pCell;
else if (para->nFlags & MEPF_ROWEND) cell = para_prev( para )->pCell;
else cell = para->pCell;
assert(cell);
/* Get the next cell. */
if (cell->member.cell.next_cell &&
cell->member.cell.next_cell->member.cell.next_cell)
{
cell = cell->member.cell.next_cell;
} else {
para = para_next( table_row_end( &ME_FindItemFwd( cell, diParagraph )->member.para ) );
if (para->nFlags & MEPF_ROWSTART) cell = para_next( para )->pCell;
else
{
/* Insert row */
para = para_prev( para );
para = table_append_row( editor, table_row_start( para ) );
/* Put cursor at the start of the new table row */
para = para_next( para );
editor->pCursors[0].pPara = para_get_di( para );
editor->pCursors[0].pRun = run_get_di( para_first_run( para ) );
editor->pCursors[0].nOffset = 0;
editor->pCursors[1] = editor->pCursors[0];
ME_WrapMarkedParagraphs(editor);
return;
}
}
/* Select cell */
editor->pCursors[1].pRun = ME_FindItemFwd(cell, diRun);
editor->pCursors[1].pPara = ME_GetParagraph(editor->pCursors[1].pRun);
editor->pCursors[1].nOffset = 0;
assert(editor->pCursors[0].pRun);
cell = cell->member.cell.next_cell;
editor->pCursors[0].pRun = ME_FindItemBack(cell, diRun);
editor->pCursors[0].pPara = ME_GetParagraph(editor->pCursors[0].pRun);
editor->pCursors[0].nOffset = 0;
assert(editor->pCursors[1].pRun);
}
else /* v1.0 - 3.0 */
{
if (run->member.run.nFlags & MERF_ENDPARA &&
ME_IsInTable(ME_FindItemFwd(run, diParagraphOrEnd)))
{
run = ME_FindItemFwd(run, diRun);
assert(run);
}
for (i = 0; i < 2; i++)
{
while (!(run->member.run.nFlags & MERF_TAB))
{
run = ME_FindItemFwd(run, diRunOrParagraphOrEnd);
if (run->type != diRun)
{
para = &run->member.para;
if (para_in_table( para ))
{
run = run_get_di( para_first_run( para ) );
assert(run);
editor->pCursors[0].pPara = para_get_di( para );
editor->pCursors[0].pRun = run;
editor->pCursors[0].nOffset = 0;
i = 1;
}
else
{
/* Insert table row */
para = table_append_row( editor, para_prev( para ) );
/* Put cursor at the start of the new table row */
editor->pCursors[0].pPara = para_get_di( para );
editor->pCursors[0].pRun = run_get_di( para_first_run( para ) );
editor->pCursors[0].nOffset = 0;
editor->pCursors[1] = editor->pCursors[0];
ME_WrapMarkedParagraphs(editor);
return;
}
}
}
if (i == 0)
run = ME_FindItemFwd(run, diRun);
editor->pCursors[i].pRun = run;
editor->pCursors[i].pPara = ME_GetParagraph(run);
editor->pCursors[i].nOffset = 0;
}
}
}
void ME_TabPressedInTable(ME_TextEditor *editor, BOOL bSelectedRow)
{
/* FIXME: Shift tab should move to the previous cell. */
ME_Cursor fromCursor, toCursor;
ME_InvalidateSelection(editor);
{
int from, to;
from = ME_GetCursorOfs(&editor->pCursors[0]);
to = ME_GetCursorOfs(&editor->pCursors[1]);
if (from <= to)
{
fromCursor = editor->pCursors[0];
toCursor = editor->pCursors[1];
} else {
fromCursor = editor->pCursors[1];
toCursor = editor->pCursors[0];
}
}
if (!editor->bEmulateVersion10) /* v4.1 */
{
if (!ME_IsInTable(toCursor.pRun))
{
editor->pCursors[0] = toCursor;
editor->pCursors[1] = toCursor;
} else {
ME_SelectOrInsertNextCell(editor, toCursor.pRun);
}
} else { /* v1.0 - 3.0 */
if (!ME_IsInTable(fromCursor.pRun)) {
editor->pCursors[0] = fromCursor;
editor->pCursors[1] = fromCursor;
/* FIXME: For some reason the caret is shown at the start of the
* previous paragraph in v1.0 to v3.0, and bCaretAtEnd only works
* within the paragraph for wrapped lines. */
if (ME_FindItemBack(fromCursor.pRun, diRun))
editor->bCaretAtEnd = TRUE;
} else if ((bSelectedRow || !ME_IsInTable(toCursor.pRun))) {
ME_SelectOrInsertNextCell(editor, fromCursor.pRun);
} else {
if (ME_IsSelection(editor) && !toCursor.nOffset)
{
ME_DisplayItem *run;
run = ME_FindItemBack(toCursor.pRun, diRunOrParagraphOrEnd);
if (run->type == diRun && run->member.run.nFlags & MERF_TAB)
ME_SelectOrInsertNextCell(editor, run);
else
ME_SelectOrInsertNextCell(editor, toCursor.pRun);
} else {
ME_SelectOrInsertNextCell(editor, toCursor.pRun);
}
}
}
ME_InvalidateSelection(editor);
ME_Repaint(editor);
update_caret(editor);
ME_SendSelChange(editor);
}
/* Make sure the cursor is not in the hidden table row start paragraph
* without a selection. */
void ME_MoveCursorFromTableRowStartParagraph(ME_TextEditor *editor)
{
ME_DisplayItem *para = editor->pCursors[0].pPara;
if (para == editor->pCursors[1].pPara &&
para->member.para.nFlags & MEPF_ROWSTART) {
/* The cursors should not be at the hidden start row paragraph without
* a selection, so the cursor is moved into the first cell. */
para = para->member.para.next_para;
editor->pCursors[0].pPara = para;
editor->pCursors[0].pRun = ME_FindItemFwd(para, diRun);
editor->pCursors[0].nOffset = 0;
editor->pCursors[1] = editor->pCursors[0];
}
}
struct RTFTable *ME_MakeTableDef(ME_TextEditor *editor)
{
RTFTable *tableDef = heap_alloc_zero(sizeof(*tableDef));
if (!editor->bEmulateVersion10) /* v4.1 */
tableDef->gapH = 10;
return tableDef;
}
void ME_InitTableDef(ME_TextEditor *editor, struct RTFTable *tableDef)
{
ZeroMemory(tableDef->cells, sizeof(tableDef->cells));
ZeroMemory(tableDef->border, sizeof(tableDef->border));
tableDef->numCellsDefined = 0;
tableDef->leftEdge = 0;
if (!editor->bEmulateVersion10) /* v4.1 */
tableDef->gapH = 10;
else /* v1.0 - 3.0 */
tableDef->gapH = 0;
}
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