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fltk/fluid/file.cxx

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//
// "$Id: file.cxx,v 1.3 1998/10/21 16:29:00 mike Exp $"
//
// Fluid file routines for the Fast Light Tool Kit (FLTK).
//
// You may find the basic read_* and write_* routines to
// be useful for other programs. I have used them many times.
// They are somewhat similar to tcl, using matching { and }
// to quote strings.
//
// Copyright 1998 by Bill Spitzak and others.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA.
//
// Please report all bugs and problems to "fltk-bugs@easysw.com".
//
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include "alignment_panel.H"
////////////////////////////////////////////////////////////////
// BASIC FILE WRITING:
static FILE *fout;
int open_write(const char *s) {
if (!s) {fout = stdout; return 1;}
FILE *f = fopen(s,"w");
if (!f) return 0;
fout = f;
return 1;
}
int close_write() {
if (fout != stdout) {
int x = fclose(fout);
fout = stdout;
return x >= 0;
}
return 1;
}
static int needspace;
int is_id(char); // in code.C
// write a string, quoting characters if necessary:
void write_word(const char *w) {
if (needspace) putc(' ', fout);
needspace = 1;
if (!w || !*w) {fprintf(fout,"{}"); return;}
const char *p;
// see if it is a single word:
for (p = w; is_id(*p); p++) ;
if (!*p) {fprintf(fout,"%s",w); return;}
// see if there are matching braces:
int n = 0;
for (p = w; *p; p++) {
if (*p == '{') n++;
else if (*p == '}') {n--; if (n<0) break;}
}
int mismatched = (n != 0);
// write out brace-quoted string:
putc('{', fout);
for (; *w; w++) {
switch (*w) {
case '{':
case '}':
if (!mismatched) break;
case '\\':
case '#':
putc('\\',fout);
break;
}
putc(*w,fout);
}
putc('}', fout);
}
// write an arbitrary formatted word, or a comment, etc:
void write_string(const char *format, ...) {
va_list args;
va_start(args, format);
if (needspace) fputc(' ',fout);
vfprintf(fout, format, args);
va_end(args);
needspace = !isspace(format[strlen(format)-1]);
}
// start a new line and indent it for a given nesting level:
void write_indent(int n) {
fputc('\n',fout);
while (n--) {fputc(' ',fout); fputc(' ',fout);}
needspace = 0;
}
// write a '{' at the given indenting level:
void write_open(int) {
if (needspace) fputc(' ',fout);
fputc('{',fout);
needspace = 0;
}
// write a '}' at the given indenting level:
void write_close(int n) {
if (needspace) write_indent(n);
fputc('}',fout);
needspace = 1;
}
////////////////////////////////////////////////////////////////
// BASIC FILE READING:
static FILE *fin;
static int lineno;
static const char *fname;
int open_read(const char *s) {
lineno = 1;
if (!s) {fin = stdin; fname = "stdin"; return 1;}
FILE *f = fopen(s,"r");
if (!f) return 0;
fin = f;
fname = s;
return 1;
}
int close_read() {
if (fin != stdin) {
int x = fclose(fin);
fin = 0;
return x >= 0;
}
return 1;
}
#include <FL/fl_message.H>
void read_error(const char *format, ...) {
va_list args;
va_start(args, format);
if (!fin) {
char buffer[1024];
vsprintf(buffer, format, args);
fl_message(buffer);
} else {
fprintf(stderr, "%s:%d: ", fname, lineno);
vfprintf(stderr, format, args);
fprintf(stderr, "\n");
}
va_end(args);
}
static int hexdigit(int x) {
if (isdigit(x)) return x-'0';
if (isupper(x)) return x-'A'+10;
if (islower(x)) return x-'a'+10;
return 20;
}
static int read_quoted() { // read whatever character is after a \ .
int c,d,x;
switch(c = fgetc(fin)) {
case '\n': lineno++; return -1;
case 'a' : return('\a');
case 'b' : return('\b');
case 'f' : return('\f');
case 'n' : return('\n');
case 'r' : return('\r');
case 't' : return('\t');
case 'v' : return('\v');
case 'x' : /* read hex */
for (c=x=0; x<3; x++) {
int ch = fgetc(fin);
d = hexdigit(ch);
if (d > 15) {ungetc(ch,fin); break;}
c = (c<<4)+d;
}
break;
default: /* read octal */
if (c<'0' || c>'7') break;
c -= '0';
for (x=0; x<2; x++) {
int ch = fgetc(fin);
d = hexdigit(ch);
if (d>7) {ungetc(ch,fin); break;}
c = (c<<3)+d;
}
break;
}
return(c);
}
// return a word read from the file, or NULL at the EOF:
// This will skip all comments (# to end of line), and evaluate
// all \xxx sequences and use \ at the end of line to remove the newline.
// A word is any one of:
// a continuous string of non-space chars except { and } and #
// everything between matching {...} (unless wantbrace != 0)
// the characters '{' and '}'
static char *buffer;
static int buflen;
static void expand_buffer(int length) {
if (length >= buflen) {
if (!buflen) {
buflen = length+1;
buffer = (char*)malloc(buflen);
} else {
buflen = 2*buflen;
if (length >= buflen) buflen = length+1;
buffer = (char *)realloc((void *)buffer,buflen);
}
}
}
const char *read_word(int wantbrace) {
int x;
// skip all the whitespace before it:
for (;;) {
x = getc(fin);
if (x < 0) { // eof
return 0;
} else if (x == '#') { // comment
do x = getc(fin); while (x >= 0 && x != '\n');
lineno++;
continue;
} else if (x == '\n') {
lineno++;
} else if (!isspace(x)) {
break;
}
}
expand_buffer(100);
if (x == '{' && !wantbrace) {
// read in whatever is between braces
int length = 0;
int nesting = 0;
for (;;) {
x = getc(fin);
if (x<0) {read_error("Missing '}'"); break;}
else if (x == '#') { // embedded comment
do x = getc(fin); while (x >= 0 && x != '\n');
lineno++;
continue;
} else if (x == '\n') lineno++;
else if (x == '\\') {x = read_quoted(); if (x<0) continue;}
else if (x == '{') nesting++;
else if (x == '}') {if (!nesting--) break;}
buffer[length++] = x;
expand_buffer(length);
}
buffer[length] = 0;
return buffer;
} else if (x == '{' || x == '}') {
// all the punctuation is a word:
buffer[0] = x;
buffer[1] = 0;
return buffer;
} else {
// read in an unquoted word:
int length = 0;
for (;;) {
if (x == '\\') {x = read_quoted(); if (x<0) continue;}
else if (x<0 || isspace(x) || x=='{' || x=='}' || x=='#') break;
buffer[length++] = x;
expand_buffer(length);
x = getc(fin);
}
ungetc(x, fin);
buffer[length] = 0;
return buffer;
}
}
////////////////////////////////////////////////////////////////
#include <FL/Fl.H>
#include "Fl_Widget_Type.H"
// global int variables:
extern int gridx, gridy, snap;
static struct {const char* name; int* value;} inttable[] = {
{"gridx", &gridx},
{"gridy", &gridy},
{"snap", &snap}
};
extern const char* header_file_name;
extern const char* code_file_name;
int write_file(const char *filename, int selected_only) {
if (!open_write(filename)) return 0;
write_string("# data file for the Fltk User Interface Designer (fluid)\n"
"version %.2f",FL_VERSION);
if(!include_H_from_C)
write_string("\ndo_not_include_H_from_C");
if (!selected_only) {
write_string("\nheader_name"); write_word(header_file_name);
write_string("\ncode_name"); write_word(code_file_name);
for (unsigned int i=0; i<sizeof(inttable)/sizeof(*inttable); i++)
write_string("\n%s %d",inttable[i].name, *inttable[i].value);
}
for (Fl_Type *p = Fl_Type::first; p;) {
if (!selected_only || p->selected) {
p->write();
write_string("\n");
int q = p->level;
for (p = p->next; p && p->level > q; p = p->next);
} else {
p = p->next;
}
}
return close_write();
}
////////////////////////////////////////////////////////////////
// read all the objects out of the input file:
void read_fdesign();
double read_version;
extern Fl_Type *Fl_Type_make(const char *tn);
static void read_children(Fl_Type *p, int paste) {
Fl_Type::current = p;
for (;;) {
unsigned int i;
const char *c = read_word();
REUSE_C:
if (!c) {
if (p && !paste) read_error("Missing '}'");
break;
}
if (!strcmp(c,"}")) {
if (!p) read_error("Unexpected '}'");
break;
}
// this is the first word in a .fd file:
if (!strcmp(c,"Magic:")) {
read_fdesign();
return;
}
if (!strcmp(c,"version")) {
c = read_word();
read_version = strtod(c,0);
if (read_version<=0 || read_version>FL_VERSION)
read_error("unknown version '%s'",c);
continue;
}
// back compatability with Vincent Penne's original class code:
if (!p && !strcmp(c,"define_in_struct")) {
Fl_Type *t = Fl_Type_make("class");
t->name(read_word());
Fl_Type::current = p = t;
paste = 1; // stops "missing }" error
continue;
}
if (!strcmp(c,"do_not_include_H_from_C"))
{
include_H_from_C=0;
goto CONTINUE;
}
if (!strcmp(c,"header_name")) {
header_file_name = strdup(read_word());
goto CONTINUE;
}
if (!strcmp(c,"code_name")) {
code_file_name = strdup(read_word());
goto CONTINUE;
}
for (i=0; i<sizeof(inttable)/sizeof(*inttable); i++) {
if (!strcmp(c,inttable[i].name)) {
c = read_word();
*inttable[i].value = atoi(c);
goto CONTINUE;
}
}
{Fl_Type *t = Fl_Type_make(c);
if (!t) {
read_error("Unknown word \"%s\"", c);
continue;
}
t->name(read_word());
c = read_word(1);
if (strcmp(c,"{")) {
read_error("Missing property list for %s\n",t->title());
goto REUSE_C;
}
t->open_ = 0;
for (;;) {
const char *c = read_word();
if (!c || !strcmp(c,"}")) break;
t->read_property(c);
}
if (!t->is_parent()) continue;
c = read_word(1);
if (strcmp(c,"{")) {
read_error("Missing child list for %s\n",t->title());
goto REUSE_C;
}
read_children(t, 0);}
Fl_Type::current = p;
CONTINUE:;
}
}
extern void deselect();
int read_file(const char *filename, int merge) {
read_version = 0.0;
if (!open_read(filename)) return 0;
if (merge) deselect(); else delete_all();
read_children(Fl_Type::current, merge);
Fl_Type::current = 0;
for (Fl_Type *o = Fl_Type::first; o; o = o->next)
if (o->selected) {Fl_Type::current = o; break;}
return close_read();
}
////////////////////////////////////////////////////////////////
// Read Forms and XForms fdesign files:
int read_fdesign_line(const char*& name, const char*& value) {
int length = 0;
int x;
// find a colon:
for (;;) {
x = getc(fin);
if (x < 0) return 0;
if (x == '\n') {length = 0; continue;} // no colon this line...
if (!isspace(x)) {
buffer[length++] = x;
expand_buffer(length);
}
if (x == ':') break;
}
int valueoffset = length;
buffer[length-1] = 0;
// skip to start of value:
for (;;) {
x = getc(fin);
if (x < 0 || x == '\n' || !isspace(x)) break;
}
// read the value:
for (;;) {
if (x == '\\') {x = read_quoted(); if (x<0) continue;}
else if (x == '\n') break;
buffer[length++] = x;
expand_buffer(length);
x = getc(fin);
}
buffer[length] = 0;
name = buffer;
value = buffer+valueoffset;
return 1;
}
int fdesign_flip;
int fdesign_magic;
#include <FL/Fl_Group.H>
static const char *class_matcher[] = {
"FL_CHECKBUTTON", "Fl_Check_Button",
"FL_ROUNDBUTTON", "Fl_Round_Button",
"FL_ROUND3DBUTTON", "Fl_Round_Button",
"FL_LIGHTBUTTON", "Fl_Light_Button",
"FL_FRAME", "Fl_Box",
"FL_LABELFRAME", "Fl_Box",
"FL_TEXT", "Fl_Box",
"FL_VALSLIDER", "Fl_Value_Slider",
"FL_MENU", "Fl_Menu_Button",
"3", "FL_BITMAP",
"1", "FL_BOX",
"71","FL_BROWSER",
"11","FL_BUTTON",
"4", "FL_CHART",
"42","FL_CHOICE",
"61","FL_CLOCK",
"25","FL_COUNTER",
"22","FL_DIAL",
"101","FL_FREE",
"31","FL_INPUT",
"12","Fl_Light_Button",
"41","FL_MENU",
"23","FL_POSITIONER",
"13","Fl_Round_Button",
"21","FL_SLIDER",
"2", "FL_BOX", // was FL_TEXT
"62","FL_TIMER",
"24","Fl_Value_Slider",
0};
void read_fdesign() {
fdesign_magic = atoi(read_word());
fdesign_flip = (fdesign_magic < 13000);
Fl_Widget_Type *window = 0;
Fl_Widget_Type *group = 0;
Fl_Widget_Type *widget = 0;
if (!Fl_Type::current) {
Fl_Type *t = Fl_Type_make("Function");
t->name("create_the_forms()");
Fl_Type::current = t;
}
for (;;) {
const char *name;
const char *value;
if (!read_fdesign_line(name, value)) break;
if (!strcmp(name,"Name")) {
window = (Fl_Widget_Type*)Fl_Type_make("Fl_Window");
window->name(value);
window->label(value);
Fl_Type::current = widget = window;
} else if (!strcmp(name,"class")) {
if (!strcmp(value,"FL_BEGIN_GROUP")) {
group = widget = (Fl_Widget_Type*)Fl_Type_make("Fl_Group");
Fl_Type::current = group;
} else if (!strcmp(value,"FL_END_GROUP")) {
if (group) {
Fl_Group* g = (Fl_Group*)(group->o);
g->begin();
g->forms_end();
Fl_Group::current(0);
}
group = widget = 0;
Fl_Type::current = window;
} else {
for (int i = 0; class_matcher[i]; i += 2)
if (!strcmp(value,class_matcher[i])) {
value = class_matcher[i+1]; break;}
widget = (Fl_Widget_Type*)Fl_Type_make(value);
if (!widget) {
printf("class %s not found, using Fl_Button\n", value);
widget = (Fl_Widget_Type*)Fl_Type_make("Fl_Button");
}
}
} else if (widget) {
if (!widget->read_fdesign(name, value))
printf("Ignoring \"%s: %s\"\n", name, value);
}
}
}
//
// End of "$Id: file.cxx,v 1.3 1998/10/21 16:29:00 mike Exp $".
//
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