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/* $XTermId: linedata.c,v 1.81 2012/09/21 20:40:21 tom Exp $ */
/*
* Copyright 2009-2010,2011 by Thomas E. Dickey
*
* All Rights Reserved
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE ABOVE LISTED COPYRIGHT HOLDER(S) BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* Except as contained in this notice, the name(s) of the above copyright
* holders shall not be used in advertising or otherwise to promote the
* sale, use or other dealings in this Software without prior written
* authorization.
*/
#include <xterm.h>
#include <data.h> /* FIXME - needed for 'term' */
#include <assert.h>
/*
* Given a row-number, find the corresponding data for the line in the VT100
* widget. Row numbers can be positive or negative.
*
* If the data comes from the scrollback, defer that to getScrollback().
*/
LineData *
getLineData(TScreen * screen, int row)
{
LineData *result = 0;
ScrnBuf buffer;
int max_row = screen->max_row;
if (row >= 0) {
buffer = screen->visbuf;
} else {
#if OPT_FIFO_LINES
buffer = 0;
result = getScrollback(screen, row);
#else
buffer = screen->saveBuf_index;
row += screen->savelines;
max_row += screen->savelines;
#endif
}
if (row >= 0 && row <= max_row) {
result = (LineData *) scrnHeadAddr(screen, buffer, (unsigned) row);
if (result != 0) {
#if 1 /* FIXME - these should be done in setupLineData, etc. */
#if OPT_WIDE_CHARS
if (screen->wide_chars) {
result->combSize = (Char) screen->max_combining;
} else {
result->combSize = 0;
}
#endif
#endif /* FIXME */
}
}
return result;
}
/*
* Copy line's data, e.g., from one screen buffer to another, given the preset
* pointers for the destination.
*
* TODO: optionally prune unused combining character data from the result.
*/
void
copyLineData(LineData * dst, LineData * src)
{
dst->bufHead = src->bufHead;
#if OPT_WIDE_CHARS
dst->combSize = src->combSize;
#endif
/*
* Usually we're copying the same-sized line; a memcpy is faster than
* several loops.
*/
if (dst->lineSize == src->lineSize) {
size_t size = (sizeof(dst->attribs[0])
#if OPT_ISO_COLORS
+ sizeof(dst->color[0])
#endif
+ sizeof(dst->charData[0])
#if OPT_WIDE_CHARS
+ sizeof(dst->combData[0][0]) * dst->combSize
#endif
);
memcpy(dst->attribs, src->attribs, size * dst->lineSize);
} else {
Dimension col;
Dimension limit = ((dst->lineSize < src->lineSize)
? dst->lineSize
: src->lineSize);
#if OPT_WIDE_CHARS
Char comb;
#endif
for (col = 0; col < limit; ++col) {
dst->attribs[col] = src->attribs[col];
#if OPT_ISO_COLORS
dst->color[col] = src->color[col];
#endif
dst->charData[col] = src->charData[col];
#if OPT_WIDE_CHARS
for (comb = 0; comb < dst->combSize; ++comb) {
dst->combData[comb][col] = src->combData[comb][col];
}
#endif
}
for (col = limit; col < dst->lineSize; ++col) {
dst->attribs[col] = 0;
#if OPT_ISO_COLORS
dst->color[col] = 0;
#endif
dst->charData[col] = 0;
#if OPT_WIDE_CHARS
for (comb = 0; comb < dst->combSize; ++comb) {
dst->combData[comb][col] = 0;
}
#endif
}
}
}
#if OPT_WIDE_CHARS
#define initLineExtra(screen) \
screen->lineExtra = ((size_t) (screen->max_combining) * sizeof(IChar *))
#else
#define initLineExtra(screen) \
screen->lineExtra = 0
#endif
void
initLineData(XtermWidget xw)
{
TScreen *screen = TScreenOf(xw);
initLineExtra(screen);
TRACE(("initLineData %lu\n", (unsigned long) screen->lineExtra));
TRACE(("...sizeof(LineData) %lu\n", (unsigned long) sizeof(LineData)));
#if OPT_ISO_COLORS
TRACE(("...sizeof(CellColor) %lu\n", (unsigned long) sizeof(CellColor)));
#endif
TRACE(("...sizeof(RowData) %lu\n", (unsigned long) sizeof(RowData)));
TRACE(("...offset(lineSize) %lu\n", (unsigned long) offsetof(LineData, lineSize)));
TRACE(("...offset(bufHead) %lu\n", (unsigned long) offsetof(LineData, bufHead)));
#if OPT_WIDE_CHARS
TRACE(("...offset(combSize) %lu\n", (unsigned long) offsetof(LineData, combSize)));
#endif
TRACE(("...offset(attribs) %lu\n", (unsigned long) offsetof(LineData, attribs)));
#if OPT_ISO_COLORS
TRACE(("...offset(color) %lu\n", (unsigned long) offsetof(LineData, color)));
#endif
TRACE(("...offset(charData) %lu\n", (unsigned long) offsetof(LineData, charData)));
TRACE(("...offset(combData) %lu\n", (unsigned long) offsetof(LineData, combData)));
}
/*
* CellData size depends on the "combiningChars" resource.
* FIXME - revise this to reduce arithmetic...
*/
#define CellDataSize(screen) (SizeOfCellData + screen->lineExtra)
#define CellDataAddr(screen, data, cell) \
(CellData *)(void *) ((char *)data + (cell * CellDataSize(screen)))
CellData *
newCellData(XtermWidget xw, Cardinal count)
{
CellData *result;
TScreen *screen = TScreenOf(xw);
initLineExtra(screen);
result = (CellData *) calloc((size_t) count, (size_t) CellDataSize(screen));
return result;
}
void
saveCellData(TScreen * screen,
CellData * data,
Cardinal cell,
LineData * ld,
int column)
{
CellData *item = CellDataAddr(screen, data, cell);
if (column < MaxCols(screen)) {
item->attribs = ld->attribs[column];
#if OPT_ISO_COLORS
item->color = ld->color[column];
#endif
item->charData = ld->charData[column];
if_OPT_WIDE_CHARS(screen, {
size_t off;
item->combSize = ld->combSize;
for_each_combData(off, ld) {
item->combData[off] = ld->combData[off][column];
}
})
}
}
void
restoreCellData(TScreen * screen,
CellData * data,
Cardinal cell,
LineData * ld,
int column)
{
CellData *item = CellDataAddr(screen, data, cell);
if (column < MaxCols(screen)) {
ld->attribs[column] = item->attribs;
#if OPT_ISO_COLORS
ld->color[column] = item->color;
#endif
ld->charData[column] = item->charData;
if_OPT_WIDE_CHARS(screen, {
size_t off;
ld->combSize = item->combSize;
for_each_combData(off, ld) {
ld->combData[off][column] = item->combData[off];
}
})
}
}
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