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IABSD.fr/xenocara/app/xterm/linedata.c
matthieu
- app/xterm/linedata.c
-
/* $XTermId: linedata.c,v 1.82 2013/02/08 00:11:16 tom Exp $ */ /* * Copyright 2009-2012,2013 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 <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. */ result->lineSize = (Dimension) MaxCols(screen); #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]; } }) } }