Adding upstream version 1.23.0.upstream/1.23.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 343 insertions, 0 deletions

diff --git a/src/devices/xditview/parse.c b/src/devices/xditview/parse.c
new file mode 100644
index 0000000..456c7da
--- /dev/null
+++ b/src/devices/xditview/parse.c
@@ -0,0 +1,343 @@
+/*
+ * parse.c
+ *
+ * parse dvi input
+ */
+
+#include <config.h>
+
+#include <X11/Xos.h>
+#include <X11/IntrinsicP.h>
+#include <X11/StringDefs.h>
+#include <stdio.h>
+#include <ctype.h>
+
+#include "DviP.h"
+#include "draw.h"
+#include "font.h"
+#include "lex.h"
+#include "page.h"
+#include "parse.h"
+
+static int StopSeen = 0;
+static void ParseDrawFunction(DviWidget, char *);
+static void ParseDeviceControl(DviWidget);
+static void push_env(DviWidget);
+static void pop_env(DviWidget);
+
+#define HorizontalMove(dw, delta)	((dw)->dvi.state->x += (delta))
+
+
+int
+ParseInput(register DviWidget dw)
+{
+	int		n, k;
+	int		c;
+	char		Buffer[BUFSIZ];
+	int		NextPage;
+	int		otherc;
+
+	StopSeen = 0;
+
+	/*
+	 * make sure some state exists
+	 */
+
+	if (!dw->dvi.state)
+	    push_env (dw);
+	for (;;) {
+		switch (DviGetC(dw, &c)) {
+		case '\n':	
+			break;
+		case ' ':	/* when input is text */
+		case 0:		/* occasional noise creeps in */
+			break;
+		case '{':	/* push down current environment */
+			push_env(dw);
+			break;
+		case '}':
+			pop_env(dw);
+			break;
+		/*
+		 * two motion digits plus a character
+		 */
+		case '0': case '1': case '2': case '3': case '4':
+		case '5': case '6': case '7': case '8': case '9':
+			HorizontalMove(dw, (c-'0')*10 +
+					   DviGetC(dw,&otherc)-'0');
+			/* fall through */
+		case 'c':	/* single ascii character */
+			DviGetC(dw,&c);
+		    	if (c == ' ')
+			    break;
+			Buffer[0] = c;
+			Buffer[1] = '\0';
+			(void) PutCharacter (dw, Buffer);
+			break;
+		case 'C':
+			GetWord (dw, Buffer, BUFSIZ);
+			(void) PutCharacter (dw, Buffer);
+			break;
+		case 't':
+			Buffer[1] = '\0';
+			while (DviGetC (dw, &c) != EOF
+			       && c != ' ' && c != '\n') {
+				Buffer[0] = c;
+				HorizontalMove (dw, PutCharacter (dw, Buffer));
+			}
+			break;
+		case 'u':
+			n = GetNumber(dw);
+			Buffer[1] = '\0';
+			while (DviGetC (dw, &c) == ' ')
+				;
+			while (c != EOF && c != ' ' && c != '\n') {
+				Buffer[0] = c;
+				HorizontalMove (dw,
+						PutCharacter (dw, Buffer) + n);
+				DviGetC (dw, &c);
+			}
+			break;
+
+		case 'D':	/* draw function */
+			(void) GetLine(dw, Buffer, BUFSIZ);
+			if (dw->dvi.display_enable)
+				ParseDrawFunction(dw, Buffer);
+			break;
+		case 's':	/* ignore fractional sizes */
+			n = GetNumber(dw);
+			dw->dvi.state->font_size = n;
+			break;
+		case 'f':
+			n = GetNumber(dw);
+			dw->dvi.state->font_number = n;
+			break;
+		case 'H':	/* absolute horizontal motion */
+			k = GetNumber(dw);
+			HorizontalGoto(dw, k);
+			break;
+		case 'h':	/* relative horizontal motion */
+			k = GetNumber(dw);
+			HorizontalMove(dw, k);
+			break;
+		case 'w':	/* word space */
+			Word (dw);
+			break;
+		case 'V':
+			n = GetNumber(dw);
+			VerticalGoto(dw, n);
+			break;
+		case 'v':
+			n = GetNumber(dw);
+			VerticalMove(dw, n);
+			break;
+		case 'P':	/* new spread */
+			break;
+		case 'p':	/* new page */
+			(void) GetNumber(dw);
+			NextPage = dw->dvi.current_page + 1;
+			RememberPagePosition(dw, NextPage);
+			FlushCharCache (dw);
+			return(NextPage);
+		case 'N':
+			n = GetNumber(dw);
+			PutNumberedCharacter (dw, n);
+			break;
+		case 'n':	/* end of line */
+			GetNumber(dw);
+			GetNumber(dw);
+			Newline (dw);
+			HorizontalGoto(dw, 0);
+			break;
+		case 'F':       /* input files */
+		case '+':	/* continuation of X device control */
+		case 'm':	/* color */
+		case '#':	/* comment */
+			GetLine(dw, NULL, 0);
+			break;
+		case 'x':	/* device control */
+			ParseDeviceControl(dw);
+			break;
+		case EOF:
+			dw->dvi.last_page = dw->dvi.current_page;
+			FlushCharCache (dw);
+			return dw->dvi.current_page;
+		default:
+			break;
+		}
+	}
+}
+
+static void
+push_env(DviWidget dw)
+{
+	DviState	*new_state;
+
+	new_state = (DviState *) XtMalloc (sizeof (*new_state));
+	if (dw->dvi.state)
+		*new_state = *(dw->dvi.state);
+	else {
+		new_state->font_size = 10;
+		new_state->font_number = 1;
+		new_state->x = 0;
+		new_state->y = 0;
+	}
+	new_state->next = dw->dvi.state;
+	dw->dvi.state = new_state;
+}
+
+static void
+pop_env(DviWidget dw)
+{
+	DviState	*old;
+
+	old = dw->dvi.state;
+	dw->dvi.state = old->next;
+	XtFree ((char *) old);
+}
+
+static void
+InitTypesetter (DviWidget dw)
+{
+	while (dw->dvi.state)
+		pop_env (dw);
+	push_env (dw);
+	FlushCharCache (dw);
+}
+
+#define DRAW_ARGS_MAX 128
+
+static void
+ParseDrawFunction(DviWidget dw, char *buf)
+{
+	int v[DRAW_ARGS_MAX];
+	int i, no_move = 0;
+	char *ptr;
+	
+	v[0] = v[1] = v[2] = v[3] = 0;
+	
+	if (buf[0] == '\0')
+		return;
+	ptr = buf+1;
+	
+	for (i = 0; i < DRAW_ARGS_MAX; i++) {
+		if (sscanf(ptr, "%d", v + i) != 1)
+			break;
+		while (*ptr == ' ')
+			ptr++;
+		while (*ptr != '\0' && *ptr != ' ')
+			ptr++;
+	}
+	
+	switch (buf[0]) {
+	case 'l':				/* draw a line */
+		DrawLine(dw, v[0], v[1]);
+		break;
+	case 'c':				/* circle */
+		DrawCircle(dw, v[0]);
+		break;
+	case 'C':
+		DrawFilledCircle(dw, v[0]);
+		break;
+	case 'e':				/* ellipse */
+		DrawEllipse(dw, v[0], v[1]);
+		break;
+	case 'E':
+		DrawFilledEllipse(dw, v[0], v[1]);
+		break;
+	case 'a':				/* arc */
+		DrawArc(dw, v[0], v[1], v[2], v[3]);
+		break;
+	case 'p':
+		DrawPolygon(dw, v, i);
+		break;
+	case 'P':
+		DrawFilledPolygon(dw, v, i);
+		break;
+	case '~':				/* wiggly line */
+		DrawSpline(dw, v, i);
+		break;
+	case 't':
+		dw->dvi.line_thickness = v[0];
+		break;
+	case 'f':
+		if (i > 0 && v[0] >= 0 && v[0] <= DVI_FILL_MAX)
+			dw->dvi.fill = v[0];
+		no_move = 1;
+		break;
+	default:
+#if 0
+		warning("unknown drawing function %s", buf);
+#endif
+		no_move = 1;
+		break;
+	}
+	
+	if (!no_move) {
+		if (buf[0] == 'e') {
+			if (i > 0)
+				dw->dvi.state->x += v[0];
+		}
+		else {
+			while (--i >= 0) {
+				if (i & 1)
+					dw->dvi.state->y += v[i];
+				else
+					dw->dvi.state->x += v[i];
+			}
+		}
+	}
+} 
+
+static void
+ParseDeviceControl(DviWidget dw)		/* Parse the x commands */
+{
+        char str[20], str1[50];
+	int c, n;
+
+	GetWord (dw, str, 20);
+	switch (str[0]) {			/* crude for now */
+	case 'T':				/* output device */
+		GetWord (dw, str, 20);
+		SetDevice (dw, str);
+		break;
+	case 'i':				/* initialize */
+		InitTypesetter (dw);
+		break;
+	case 't':				/* trailer */
+		break;
+	case 'p':				/* pause -- can restart */
+		break;
+	case 's':				/* stop */
+		StopSeen = 1;
+		return;
+	case 'r':				/* resolution when prepared */
+		break;
+	case 'f':				/* font used */
+		n = GetNumber (dw);
+		GetWord (dw, str, 20);
+		GetLine (dw, str1, 50);
+		SetFontPosition (dw, n, str, str1);
+		break;
+	case 'H':				/* char height */
+		break;
+	case 'S':				/* slant */
+		break;
+	}
+	while (DviGetC (dw, &c) != '\n')	/* skip rest of input line */
+		if (c == EOF)
+			return;
+	return;
+}
+
+
+/*
+Local Variables:
+c-indent-level: 8
+c-continued-statement-offset: 8
+c-brace-offset: -8
+c-argdecl-indent: 8
+c-label-offset: -8
+c-tab-always-indent: nil
+End:
+*/