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Diffstat (limited to 'src/devices/xditview/parse.c')
-rw-r--r--src/devices/xditview/parse.c366
1 files changed, 366 insertions, 0 deletions
diff --git a/src/devices/xditview/parse.c b/src/devices/xditview/parse.c
new file mode 100644
index 00000000..de7d6baa
--- /dev/null
+++ b/src/devices/xditview/parse.c
@@ -0,0 +1,366 @@
+/*
+ * parse.c
+ *
+ * parse dvi input
+ */
+
+#include <X11/Xos.h>
+#include <X11/IntrinsicP.h>
+#include <X11/StringDefs.h>
+#include <stdio.h>
+#include <ctype.h>
+#include "DviP.h"
+
+static int StopSeen = 0;
+static void ParseDrawFunction(DviWidget, char *);
+static void ParseDeviceControl(DviWidget);
+static void push_env(DviWidget);
+static void pop_env(DviWidget);
+
+/* draw.c */
+extern int PutCharacter(DviWidget, char *);
+extern int PutNumberedCharacter(DviWidget, int);
+extern void HorizontalGoto(DviWidget, int);
+extern void Word(DviWidget);
+extern void VerticalGoto(DviWidget, int);
+extern void VerticalMove(DviWidget, int);
+extern void FlushCharCache(DviWidget);
+extern void Newline(DviWidget);
+extern void DrawLine(DviWidget, int, int);
+extern void DrawCircle(DviWidget, int);
+extern void DrawFilledCircle(DviWidget, int);
+extern void DrawEllipse(DviWidget, int, int);
+extern void DrawFilledEllipse(DviWidget, int, int);
+extern void DrawArc(DviWidget, int, int, int, int);
+extern void DrawPolygon(DviWidget, int *, int);
+extern void DrawFilledPolygon(DviWidget, int *, int);
+extern void DrawSpline(DviWidget, int *, int);
+
+/* Dvi.c */
+extern void SetDevice(DviWidget, const char *);
+
+/* page.c */
+extern void RememberPagePosition(DviWidget, int);
+
+/* font.c */
+extern void SetFontPosition(DviWidget, int, const char *, const char *);
+
+/* lex.c */
+extern int GetNumber(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:
+*/
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