/*
* Implementation
*/
static int
CharWidth(MultiSinkObject sink, XFontSet fontset, int x, wchar_t c)
{
int width = 0;
if (c == _Xaw_atowc(XawLF))
return (0);
if (c == _Xaw_atowc(XawTAB)) {
int i;
Position *tab;
width = x;
/* Adjust for Left Margin. */
x -= ((TextWidget)XtParent((Widget)sink))->text.left_margin;
i = 0;
tab = sink->text_sink.tabs;
/*CONSTCOND*/
while (1) {
if (x < *tab)
return (*tab - x);
/* Start again */
if (++i >= sink->text_sink.tab_count) {
x -= *tab;
i = 0;
tab = sink->text_sink.tabs;
if (width == x)
return (0);
}
else
++tab;
}
/*NOTREACHED*/
}
if (XwcTextEscapement(fontset, &c, 1) == 0) {
if (sink->multi_sink.display_nonprinting)
c = _Xaw_atowc('@');
else
c = _Xaw_atowc(XawSP);
}
/*
* if more efficiency(suppose one column is one ASCII char)
width = XwcGetColumn(fontset->font_charset, fontset->num_of_fonts, c) *
fontset->font_struct_list[0]->min_bounds.width;
*
* WARNING: Very Slower!!!
*
* Li Yuhong.
*/
width = XwcTextEscapement(fontset, &c, 1);
return (width);
}
static int
CharWidth(Widget w, int x, wchar_t c)
{
int i, width;
MultiSinkObject sink = (MultiSinkObject) w;
XFontSet fontset = sink->multi_sink.fontset;
Position *tab;
if (c == _Xaw_atowc(XawLF))
return (0);
if (c == _Xaw_atowc(XawTAB)) {
/* Adjust for Left Margin. */
x -= ((TextWidget) XtParent(w))->text.margin.left;
if (x >= (int) XtParent(w)->core.width)
return 0;
for (i = 0, tab = sink->text_sink.tabs;
i < sink->text_sink.tab_count; i++, tab++) {
if (x < *tab) {
if (*tab < (int) XtParent(w)->core.width)
return *tab - x;
else
return 0;
}
}
return 0;
}
if (XwcTextEscapement(fontset, &c, 1) == 0) {
if (sink->multi_sink.display_nonprinting)
c = _Xaw_atowc('@');
else {
c = _Xaw_atowc(XawSP);
}
}
/*
* if more efficiency(suppose one column is one ASCII char)
width = XwcGetColumn(fontset->font_charset, fontset->num_of_fonts, c) *
fontset->font_struct_list[0]->min_bounds.width;
*
* WARNING: Very Slower!!!
*
* Li Yuhong.
*/
width = XwcTextEscapement(fontset, &c, 1);
return width;
}
/* Function Name: PaintText
* Description: Actually paints the text into the windoe.
* Arguments: w - the text widget.
* gc - gc to paint text with.
* x, y - location to paint the text.
* buf, len - buffer and length of text to paint.
* Returns: the width of the text painted, or 0.
*
* NOTE: If this string attempts to paint past the end of the window
* then this function will return zero.
*/
static Dimension
PaintText(Widget w, GC gc, Position x, Position y, wchar_t *buf, int len)
{
MultiSinkObject sink = (MultiSinkObject) w;
TextWidget ctx = (TextWidget) XtParent(w);
XFontSet fontset = sink->multi_sink.fontset;
Position max_x;
Dimension width = (Dimension) XwcTextEscapement(fontset, buf, len);
XFontSetExtents *ext = XExtentsOfFontSet(fontset);
max_x = (Position) ctx->core.width;
if (((int) width) <= -x) /* Don't draw if we can't see it. */
return (width);
XwcDrawImageString(XtDisplay(ctx), XtWindow(ctx), fontset, gc,
(int) x, (int) y, buf, len);
if ((((Position) width + x) > max_x) && (ctx->text.margin.right != 0)) {
x = (Position) (ctx->core.width - ctx->text.margin.right);
width = (Dimension) ctx->text.margin.right;
XFillRectangle(XtDisplay((Widget) ctx), XtWindow((Widget) ctx),
sink->multi_sink.normgc, (int) x,
(int) y - abs(ext->max_logical_extent.y),
(unsigned int) width,
(unsigned int) ext->max_logical_extent.height);
return (0);
}
return (width);
}
/*
* Function:
* PaintText
*
* Parameters:
* w - text sink object
* gc - gc to paint text
* x - location to paint the text
* y - ""
* buf - buffer and length of text to paint
* len - ""
* clear_bg - clear background before drawing ?
*
* Description:
* Actually paints the text into the window.
*
* Returns:
* The width of the text painted
*/
static unsigned int
PaintText(Widget w, GC gc, int x, int y, wchar_t *buf, int len, Bool clear_bg)
{
MultiSinkObject sink = (MultiSinkObject)w;
TextWidget ctx = (TextWidget)XtParent(w);
XFontSet fontset = sink->multi_sink.fontset;
unsigned int width = XwcTextEscapement(fontset, buf, len);
if (((int)width) <= -x) /* Don't draw if we can't see it */
return (width);
if (clear_bg) {
XFontSetExtents *ext = XExtentsOfFontSet(fontset);
_XawTextSinkClearToBackground(w, x, y - abs(ext->max_logical_extent.y),
width, ext->max_logical_extent.height);
XwcDrawString(XtDisplay(ctx), XtWindow(ctx), fontset, gc, x, y, buf, len);
}
else
XwcDrawImageString(XtDisplay(ctx), XtWindow(ctx), fontset, gc,
x, y, buf, len);
return (width);
}
/*
* This function does not know about drawing more than one line of text.
*/
static void
DisplayText(
Widget w,
Position x,
Position y,
XawTextPosition pos1,
XawTextPosition pos2,
Boolean highlight)
{
MultiSinkObject sink = (MultiSinkObject) w;
Widget source = XawTextGetSource(XtParent(w));
wchar_t buf[BUFSIZ];
XFontSetExtents *ext = XExtentsOfFontSet(sink->multi_sink.fontset);
int j, k;
XawTextBlock blk;
GC gc = highlight ? sink->multi_sink.invgc : sink->multi_sink.normgc;
GC invgc = highlight ? sink->multi_sink.normgc : sink->multi_sink.invgc;
if (!sink->multi_sink.echo)
return;
y = (Position) (y + abs(ext->max_logical_extent.y));
for (j = 0; pos1 < pos2;) {
pos1 = (int) XawTextSourceRead(source, pos1, &blk, (int) (pos2 - pos1));
for (k = 0; k < blk.length; k++) {
if (j >= BUFSIZ) { /* buffer full, dump the text. */
x = (Position) (x + PaintText(w, gc, x, y, buf, j));
j = 0;
}
buf[j] = ((wchar_t *) blk.ptr)[k];
if (buf[j] == _Xaw_atowc(XawLF))
continue;
else if (buf[j] == _Xaw_atowc(XawTAB)) {
Position temp = 0;
Dimension width;
if ((j != 0)
&& ((temp = (Position) PaintText(w, gc, x, y, buf, j)
) == 0))
return;
x = (Position) (x + temp);
width = (Dimension) CharWidth(w, x, _Xaw_atowc(XawTAB));
XFillRectangle(XtDisplayOfObject(w), XtWindowOfObject(w),
invgc, (int) x,
(int) y - abs(ext->max_logical_extent.y),
(unsigned int) width,
(unsigned int) ext->max_logical_extent.height);
x = (Position) (x + width);
j = -1;
} else if (XwcTextEscapement(sink->multi_sink.fontset,
&buf[j], 1) == 0) {
if (sink->multi_sink.display_nonprinting)
buf[j] = _Xaw_atowc('@');
else
buf[j] = _Xaw_atowc(' ');
}
j++;
}
}
if (j > 0)
(void) PaintText(w, gc, x, y, buf, j);
}
/*
* The following procedure manages the "insert" cursor
*/
static void
InsertCursor(Widget w, int x, int y, XawTextInsertState state)
{
MultiSinkObject sink = (MultiSinkObject)w;
XFontSet fontset = sink->multi_sink.fontset;
Widget ctx = XtParent(w);
XawTextPosition position = XawTextGetInsertionPoint(ctx);
if (XtIsRealized(ctx)) {
int fheight, fdiff;
XawTextBlock block;
wchar_t c;
XawTextPosition selection_start, selection_end;
Boolean has_selection;
XFontSetExtents *ext = XExtentsOfFontSet(fontset);
XawTextGetSelectionPos((Widget)ctx, &selection_start, &selection_end);
has_selection = selection_start != selection_end;
fheight = ext->max_logical_extent.height;
fdiff = fheight - abs(ext->max_logical_extent.y);
if ((sink->multi_sink.cursor_position != position || state == XawisOff)
&& !has_selection && sink->multi_sink.laststate != XawisOff) {
wchar_t *ochar;
(void)XawTextSourceRead(XawTextGetSource(ctx),
sink->multi_sink.cursor_position,
&block, 1);
if (!block.length)
ochar = NULL;
else {
c = ((wchar_t *)block.ptr)[0];
if (c == _Xaw_atowc(XawLF))
ochar = NULL;
else if (c == _Xaw_atowc(XawTAB))
ochar = wspace;
else
ochar = (wchar_t *)block.ptr;
}
if (!ochar)
_XawTextSinkClearToBackground(w, sink->multi_sink.cursor_x,
(sink->multi_sink.cursor_y - 1 -
fheight), CharWidth(sink, fontset,
0, wspace[0]),
fheight);
else {
if (XwcTextEscapement(sink->multi_sink.fontset, ochar, 1) != 0)
DisplayText(w, sink->multi_sink.cursor_x,
sink->multi_sink.cursor_y - 1 - fheight,
sink->multi_sink.cursor_position,
sink->multi_sink.cursor_position + 1,
False);
else
PaintText(w, sink->multi_sink.normgc,
sink->multi_sink.cursor_x,
sink->multi_sink.cursor_y - 1 - fdiff,
ochar, 1,
ctx->core.background_pixmap != XtUnspecifiedPixmap);
}
}
if (!has_selection && state != XawisOff) {
wchar_t *nchar;
Boolean focus = ((TextWidget)ctx)->text.hasfocus;
(void)XawTextSourceRead(XawTextGetSource(ctx),
position, &block, 1);
c = ((wchar_t *)block.ptr)[0];
if (!block.length || c == _Xaw_atowc(XawLF)
|| c == _Xaw_atowc(XawTAB))
nchar = wspace;
else
nchar = (wchar_t *)block.ptr;
if (focus) {
if (XwcTextEscapement(sink->multi_sink.fontset, nchar, 1) != 0)
XwcDrawImageString(XtDisplay(ctx), XtWindow(ctx),
fontset, sink->multi_sink.invgc,
x, (y - 1 - fdiff), nchar, 1);
else
DisplayText(w, x, y - 1 - fheight,
position, position + 1, True);
}
else
XDrawRectangle(XtDisplay(ctx), XtWindow(ctx),
sink->multi_sink.xorgc ?
sink->multi_sink.xorgc : sink->multi_sink.normgc,
x, y - 1 - fheight,
CharWidth(sink, fontset, 0, *nchar) - 1,
fheight - 1);
}
}
sink->multi_sink.cursor_x = x;
sink->multi_sink.cursor_y = y;
sink->multi_sink.laststate = state;
sink->multi_sink.cursor_position = position;
}
/*
* This function does not know about drawing more than one line of text
*/
static void
DisplayText(Widget w, int x, int y,
XawTextPosition pos1, XawTextPosition pos2, Bool highlight)
{
TextWidget ctx = (TextWidget)XtParent(w);
MultiSinkObject sink = (MultiSinkObject)w;
XFontSet fontset = sink->multi_sink.fontset;
Widget source = XawTextGetSource(XtParent(w));
wchar_t buf[256];
XFontSetExtents *ext = XExtentsOfFontSet(fontset);
int j, k;
XawTextBlock blk;
GC gc, invgc, tabgc;
int max_x;
Bool clear_bg;
if (!sink->multi_sink.echo || !ctx->text.lt.lines)
return;
max_x = (int)XtWidth(ctx) - ctx->text.r_margin.right;
clear_bg = !highlight && ctx->core.background_pixmap != XtUnspecifiedPixmap;
gc = highlight ? sink->multi_sink.invgc : sink->multi_sink.normgc;
invgc = highlight ? sink->multi_sink.normgc : sink->multi_sink.invgc;
if (highlight && sink->multi_sink.xorgc)
tabgc = sink->multi_sink.xorgc;
else
tabgc = invgc;
y += abs(ext->max_logical_extent.y);
for (j = 0; pos1 < pos2;) {
pos1 = XawTextSourceRead(source, pos1, &blk, (int) pos2 - pos1);
for (k = 0; k < blk.length; k++) {
if ((unsigned) j >= (sizeof(buf) / sizeof(wchar_t)) - 1) {
/* buffer full, dump the text */
if ((x += PaintText(w, gc, x, y, buf, j, clear_bg)) >= max_x)
return;
j = 0;
}
buf[j] = ((wchar_t *)blk.ptr)[k];
if (buf[j] == _Xaw_atowc(XawLF))
continue;
else if (buf[j] == _Xaw_atowc(XawTAB)) {
unsigned int width;
if (j != 0 &&
(x += PaintText(w, gc, x, y, buf, j, clear_bg)) >= max_x)
return;
width = CharWidth(sink, fontset, x, _Xaw_atowc(XawTAB));
if (clear_bg)
_XawTextSinkClearToBackground(w,
x, y - abs(ext->max_logical_extent.y),
width, ext->max_logical_extent.height);
else
XFillRectangle(XtDisplayOfObject(w), XtWindowOfObject(w),
tabgc, x,
y - abs(ext->max_logical_extent.y),
width,
ext->max_logical_extent.height);
x += width;
j = -1;
}
else if (XwcTextEscapement(sink->multi_sink.fontset, &buf[j], 1)
== 0) {
if (sink->multi_sink.display_nonprinting)
buf[j] = _Xaw_atowc('@');
else
buf[j] = _Xaw_atowc(XawSP);
}
j++;
}
}
if (j > 0)
(void)PaintText(w, gc, x, y, buf, j, clear_bg);
}
