Files
cdesktop/cde/lib/tt/demo/edit_demo/edit.c
2018-04-28 12:36:44 -06:00

797 lines
18 KiB
C

/*
* CDE - Common Desktop Environment
*
* Copyright (c) 1993-2012, The Open Group. All rights reserved.
*
* These libraries and programs are free software; you can
* redistribute them and/or modify them under the terms of the GNU
* Lesser General Public License as published by the Free Software
* Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* These libraries and programs are distributed in the hope that
* they will be useful, but WITHOUT ANY WARRANTY; without even the
* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the GNU Lesser General Public License for more
* details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with these libraries and programs; if not, write
* to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
* Floor, Boston, MA 02110-1301 USA
*/
/*%% (c) Copyright 1993, 1994 Hewlett-Packard Company */
/*%% (c) Copyright 1993, 1994 International Business Machines Corp. */
/*%% (c) Copyright 1993, 1994 Sun Microsystems, Inc. */
/*%% (c) Copyright 1993, 1994 Novell, Inc. */
/*%% $XConsortium: edit.c /main/3 1995/10/23 09:46:34 rswiston $ */
/*
* edit.c
*
* Copyright (c) 1993 by Sun Microsystems, Inc.
*/
/*
* Implementation of a simple "remote-control" editor. Accepts requests
* to edit, save, and close files as well as hilite "objects" created in
* the file. Objects are kept track of by wrapping them in C-style
* comments with their respective object ids.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/param.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <Xm/Xm.h>
#include <Xm/Label.h>
#include <Xm/Form.h>
#include <Xm/PushB.h>
#include <Xm/Text.h>
#include <desktop/tt_c.h>
#include "Sun_EditDemo_opnums.h"
Display *dpy;
XtAppContext app;
char current_file[MAXPATHLEN];
int do_close = 0;
int text_modified = -1;
Widget edit_ui_base_window;
Widget edit_ui_textpane;
Widget edit_ui_panel;
Widget edit_ui_obj_button;
Widget edit_ui_message;
void
main(argc, argv)
int argc;
char **argv;
{
char *dfile;
/*
* Initialize Motif.
*/
XtToolkitInitialize();
app = XtCreateApplicationContext();
dpy = XtOpenDisplay(app, 0, 0, "edit", 0, 0, &argc, argv );
/*
* Initialize user interface components.
*/
edit_ui_initialize();
if (! edit_init_tt()) {
fprintf(stderr,"%s: Can't initialize ToolTalk\n", argv[0]);
exit(1);
}
/*
* Turn control over to Motif.
*/
while (! do_close) {
XEvent event;
XtAppNextEvent(app, &event);
XtDispatchEvent(&event);
}
if ((dfile = tt_default_file()) != (char *)0) {
tt_file_quit(dfile);
}
tt_close();
exit(0);
}
void
write_footer(message)
char *message;
{
XmString label;
label = XmStringCreateSimple(message);
XtVaSetValues(edit_ui_message, XmNlabelString, label, 0);
XmStringFree(label);
}
Tt_status
read_file(widget, file)
Widget widget;
char *file;
{
char buf[BUFSIZ], *text;
struct stat statb;
int len;
FILE *fp;
Tt_status status;
/*
* Make sure the file is a regular text file and open it.
*/
if (stat(file, &statb) == -1 || (statb.st_mode & S_IFMT) != S_IFREG ||
!(fp = fopen(file, "r"))) {
perror(file);
return TT_ERR_FILE;
}
/*
* Put the contents of the file in the Text widget by allocating
* enough space for the entire file, reading the file into the space,
* and using XmTextSetString() to show the file.
*/
strcpy(current_file, file);
len = (int) statb.st_size;
if (!(text = XtMalloc((unsigned)(len+1)))) {
sprintf(buf, "%s: XtMalloc(%ld) failed", file, len);
XmTextSetString(widget, buf);
} else {
if (fread(text, sizeof(char), len, fp) != len) {
status = TT_ERR_FILE;
} else {
status = TT_OK;
text[len] = 0;
XmTextSetString(widget, text);
}
}
XtFree(text);
fclose(fp);
return status;
}
/* Write the contents of a text widget to a file. */
Tt_status
write_file(widget, file)
Widget widget;
char *file;
{
char *text;
int len;
FILE *fp;
Tt_status status;
if (!(fp = fopen(file, "w"))) {
perror(file);
return TT_ERR_FILE;
}
/* Saving -- get text from the text widget. */
text = XmTextGetString(widget);
len = (int) XmTextGetLastPosition(widget);
/* Write it to file (check for error). */
if (fwrite(text, sizeof(char), len, fp) != len) {
status = TT_ERR_FILE;
} else {
status = TT_OK;
}
fclose(fp);
return status;
}
/*
* Initialize our ToolTalk environment.
*/
int
edit_init_tt()
{
int mark;
char *procid = tt_open();
int ttfd;
void edit_receive_tt_message();
mark = tt_mark();
if (tt_pointer_error(procid) != TT_OK) {
return 0;
}
if (tt_ptype_declare("Sun_EditDemo") != TT_OK) {
fprintf(stderr,"Sun_EditDemo is not an installed ptype.\n");
return 0;
}
ttfd = tt_fd();
XtAppAddInput(app, ttfd, (XtPointer) XtInputReadMask,
edit_receive_tt_message, 0);
tt_session_join(tt_default_session());
/*
* Note that without tt_mark() and tt_release(), the above
* combination would leak storage -- tt_default_session() returns
* a copy owned by the application, but since we don't assign the
* pointer to a variable we could not free it explicitly.
*/
tt_release(mark);
return 1;
}
/*
* Handle any incoming ToolTalk messages.
*/
void
edit_receive_tt_message(client_data, fid, id)
XtPointer client_data;
int *fid;
XtInputId *id;
{
Tt_message msg_in;
int opnum;
int opstatus;
char *file;
msg_in = tt_message_receive();
if (msg_in == NULL) return;
if (tt_pointer_error(msg_in) == TT_ERR_NOMP) {
fprintf(stderr,"ToolTalk server down.\n");
exit(0);
}
switch (tt_message_opnum(msg_in)) {
case SUN_EDITDEMO_EDIT:
opstatus = edit_edit(msg_in);
break;
case SUN_EDITDEMO_SAVE:
opstatus = edit_save(msg_in);
break;
case SUN_EDITDEMO_SAVE_AS:
opstatus = edit_save(msg_in);
break;
case SUN_EDITDEMO_CLOSE:
opstatus = edit_close(msg_in);
break;
case SUN_EDITDEMO_HILITE_OBJ:
opstatus = edit_hilite_obj(msg_in);
break;
default:
/* don't know what else to do with this message */
tt_message_reject(msg_in);
break;
}
if (opstatus == 0) {
tt_message_fail(msg_in);
} else {
tt_message_reply(msg_in);
}
tt_message_destroy(msg_in);
return;
}
/*
* Handle the "edit" op.
*/
int
edit_edit(msg)
Tt_message msg;
{
int mark = tt_mark();
char *file = tt_message_file(msg);
char *dfile = tt_default_file();
char buf[255];
if (access(file, R_OK) != 0) {
tt_message_status_set(msg, TT_ERR_FILE);
tt_message_status_string_set(msg,"Can't open file for read.");
tt_release(mark);
return 0;
} else {
if (dfile == (char *)0 || 0 != strcmp(dfile, file)) {
/* if not already editing this file, load it */
/* in. */
tt_default_file_set(file);
tt_file_join(file);
read_file(edit_ui_textpane, file);
sprintf(buf,"Sun_EditDemo_edit: (%s)", file);
XtVaSetValues(edit_ui_base_window,
XmNtitle, buf, 0);
}
tt_release(mark);
return 1;
}
}
/*
* Handle the "save" op.
*/
int
edit_save(msg)
Tt_message msg;
{
int mark = tt_mark();
char *new_file;
if (text_modified == 0) {
/* no save is needed */
tt_release(mark);
return 1;
}
if (tt_message_opnum(msg) == SUN_EDITDEMO_SAVE) {
if (write_file(edit_ui_textpane, current_file) == TT_OK) {
text_modified = 0;
tt_message_reply(msg);
tt_release(mark);
return 1;
}
} else {
/* handle SAVE_AS */
new_file = tt_message_arg_val(msg, 0);
if (write_file(edit_ui_textpane, new_file) == TT_OK) {
tt_file_quit(tt_default_file());
tt_default_file_set(new_file);
tt_file_join(new_file);
read_file(edit_ui_textpane, new_file);
tt_release(mark);
return 1;
}
}
/* couldn't complete operation */
tt_message_status_set(msg, TT_ERR_FILE);
tt_message_status_string_set(msg, "Couldn't save file");
tt_release(mark);
return 0;
}
/*
* Handle the "close" op.
*/
int
edit_close(msg)
Tt_message msg;
{
Atom wmchs;
Window w;
XClientMessageEvent xev;
if (text_modified > 0) {
tt_message_status_set(msg, TT_ERR_FILE);
tt_message_status_string_set(msg, "File has been modified");
return 0;
} else {
do_close = 1;
/* Send an event to force the event loop to "click on" and quit the program. */
w = XtWindow(edit_ui_base_window);
wmchs = XInternAtom(dpy, "WM_CHANGE_STATE", True);
xev.type = ClientMessage;
xev.message_type = wmchs;
xev.window = w;
xev.format = 32;
xev.data.l[0] = IconicState;
XSendEvent(dpy, w, True, (SubstructureRedirectMask |
SubstructureNotifyMask), &xev) ;
XFlush(dpy);
return 1;
}
}
/*
* Handle the "hilite_obj" op.
*/
int
edit_hilite_obj(msg)
Tt_message msg;
{
int mark = tt_mark();
char *objid = tt_message_arg_val(msg, 0);
char obj_start_text[100];
char obj_end_text[100];
if (tt_message_status(msg) == TT_WRN_START_MESSAGE
&& edit_edit(msg) == 0) {
/* we were started to hilite an object but couldn't load the */
/* file into the textpane. */
tt_release(mark);
return 0;
}
/* expect objects to be wrapped by appropiately formatted */
/* C-style comments. */
sprintf(obj_start_text," /* begin_object(%s) */", objid);
sprintf(obj_end_text," /* end_object(%s) */", objid);
if (select_region(edit_ui_textpane,
obj_start_text,
obj_end_text) == 1) {
tt_release(mark);
return 1;
} else {
tt_message_status_set(msg, TT_ERR_OBJID);
tt_message_status_string_set(msg,"Couldn't find object");
tt_release(mark);
return 0;
}
}
/*
* Make a ToolTalk spec out of the selected text in this textpane. Once
* the spec is successfully created and written to a database, wrap the
* text with C-style comments in order to delimit the object and send out
* a notification that an object has been created in this file.
*/
void
edit_ui_make_object(widget, client_data, call_data)
Widget widget;
XtPointer client_data, call_data;
{
int mark = tt_mark();
char *objid;
char *file;
char *sel;
XmTextPosition first, last;
char obj_start_text[100];
char obj_end_text[100];
Tt_message msg;
if (! get_selection(edit_ui_textpane, &sel, &first, &last)) {
write_footer("First select some text");
tt_release(mark);
return;
}
file = tt_default_file();
if (file == (char *)0) {
write_footer("Not editing any file");
tt_release(mark);
return;
}
/* create a new spec */
objid = tt_spec_create(tt_default_file());
if (tt_pointer_error(objid) != TT_OK) {
write_footer("Couldn't create object");
tt_release(mark);
return;
}
/* set its otype */
tt_spec_type_set(objid, "Sun_EditDemo_object");
if (tt_spec_write(objid) != TT_OK) {
write_footer("Couldn't write out object");
tt_release(mark);
return;
}
/* wrap spec's contents (the selected text) with C-style */
/* comments. */
sprintf(obj_start_text," /* begin_object(%s) */", objid);
sprintf(obj_end_text," /* end_object(%s) */", objid);
(void)wrap_selection(edit_ui_textpane,
obj_start_text, obj_end_text);
/* now send out a notification that we've added a new object */
msg = tt_pnotice_create(TT_FILE_IN_SESSION,"Sun_EditDemo_new_object");
tt_message_file_set(msg, file);
tt_message_send(msg);
tt_release(mark);
return;
}
/*
* Get the current selection. Returns 1 if the selection is in the passed
* in textsw.
*/
int
get_selection(widget, selection, first_ptr, last_ptr)
Widget widget;
char **selection;
XmTextPosition *first_ptr, *last_ptr;
{
char *ptr;
ptr = XmTextGetSelection(widget);
if (ptr == NULL) return 0;
*selection = malloc(strlen(ptr) + 1);
if (*selection == (char *)0) {
return -1;
}
(void)strcpy(*selection, ptr);
XmTextGetSelectionPosition(widget, first_ptr, last_ptr);
return 1;
}
void
reverse_str(str)
char *str;
{
char c;
int i, n;
n = strlen(str);
for (i = 0; i < n/2; i++) {
c = str[i];
str[i] = str[n-i];
str[n-i] = c;
}
}
int
text_find_bytes(widget, first, last, str, reverse)
Widget widget;
XmTextPosition *first, *last;
int reverse;
char *str;
{
char *ptr, *text;
int n;
text = XmTextGetString(widget);
if (reverse) {
reverse_str(text);
reverse_str(str);
}
ptr = strstr(&text[*first], str);
if (ptr == NULL) return -1;
n = strlen(str);
if (reverse) {
*last = (XmTextPosition) ptr;
*first = (XmTextPosition) ptr - n;
} else {
*first = (XmTextPosition) ptr;
*last = (XmTextPosition) ptr + n;
}
return 0;
}
/*
* Selects region between "begin" and "end" in textsw. Returns 1 if
* successful.
*/
int
select_region(widget, begin, end)
Widget widget;
char *begin;
char *end;
{
XmTextPosition bfirst, blast, efirst, elast;
XmTextPosition inspoint;
int status;
inspoint = XmTextGetInsertionPosition(widget);
/* Find the "begin" text */
/* first search forward */
bfirst = inspoint;
status = text_find_bytes(widget, &bfirst, &blast, begin, 0);
if (status == -1) {
bfirst = inspoint;
/* search failed, search backwards */
status = text_find_bytes(widget, &bfirst, &blast, begin, 1);
if (status == -1) {
return 0;
}
}
/* Find the "end" text */
efirst = inspoint;
/* first search forward */
status = text_find_bytes(widget, &efirst, &elast, end, 0);
if (status == -1) {
efirst = inspoint;
/* search failed, search backwards */
status = text_find_bytes(widget, &efirst, &elast, end, 1);
if (status == -1) {
return 0;
}
}
XmTextSetSelection(widget,
(inspoint = (blast < elast) ? blast : elast),
(efirst > bfirst) ? efirst : bfirst,
CurrentTime);
XmTextSetInsertionPosition(widget, inspoint);
XmTextShowPosition(widget, inspoint);
return 1;
}
/*
* Wraps the selected text in textsw with the begin and end strings
* supplied. Returns 1 if successful.
*/
int
wrap_selection(widget, begin, end)
Widget widget;
char *begin;
char *end;
{
char *buf;
char *sel;
XmTextPosition sel_first, sel_last;
int sel_status;
if (! (sel_status = get_selection(widget,
&sel, &sel_first, &sel_last))) {
return sel_status;
}
buf = malloc(strlen(sel) + strlen(begin) + strlen(end) + 3);
if (buf == (char *)0) {
return -1;
}
sprintf(buf,"%s\n%s\n%s", begin, sel, end);
XmTextReplace(widget, sel_first, sel_last + 1, buf);
free(buf);
free(sel);
return sel_status;
}
/*
* Increment a flag every time this routine is called. Note that it's
* called once, when the text is initially loaded, so the flag is initially
* -1, to counter this.
*/
text_modify(widget, client_data, cbs)
Widget widget;
XtPointer client_data;
XmTextVerifyCallbackStruct *cbs;
{
text_modified++;
}
/*
* Initialize our ui environment.
*/
edit_ui_initialize()
{
Arg args[20];
Pixmap icon;
XmString label;
int n, screen;
static unsigned short icon_bits[] = {
0x3FFF,0xFF00,
0x2000,0x0180,
0x2000,0x0140,
0x2000,0x0120,
0x2000,0x0110,
0x2000,0x0108,
0x2000,0x0104,
0x2000,0x01FE,
0x2000,0x0006,
0x2000,0x0006,
0x2000,0x0006,
0x2000,0x0006,
0x2000,0x0006,
0x2000,0x0006,
0x2000,0x0006,
0x2000,0x0006,
0x2000,0x0006,
0x2000,0x0006,
0x2000,0x0006,
0x2000,0x0006,
0x2000,0x0006,
0x2000,0x0006,
0x2000,0x0006,
0x2000,0x0006,
0x2000,0x0006,
0x2000,0x0006,
0x2000,0x0006,
0x2000,0x0006,
0x2000,0x0006,
0x2000,0x0006,
0x3FFF,0xFFFE,
0x1FFF,0xFFFE
};
edit_ui_base_window = XtAppCreateShell(0, "base_frame",
applicationShellWidgetClass, dpy, 0, 0 );
screen = DefaultScreen(dpy);
icon = XCreatePixmapFromBitmapData(dpy, RootWindow(dpy, screen),
(char *) icon_bits, 32, 32, 1, 0, 1);
XtVaSetValues(edit_ui_base_window,
XmNwidth, 509,
XmNheight, 420,
XmNtitle, "Sun_EditDemo_edit",
XmNiconName, "Sun_EditDemo_edit",
XmNiconPixmap, icon,
0);
edit_ui_panel = XtVaCreateManagedWidget("panel",
xmFormWidgetClass, edit_ui_base_window, 0);
label = XmStringCreateSimple("Make object");
edit_ui_obj_button = XtVaCreateManagedWidget("button",
xmPushButtonWidgetClass, edit_ui_panel,
XmNtopAttachment, XmATTACH_FORM,
XmNtopOffset, 5,
XmNleftAttachment, XmATTACH_FORM,
XmNleftOffset, 5,
XmNlabelString, label,
0);
XmStringFree(label);
XtAddCallback(edit_ui_obj_button,
XmNactivateCallback, edit_ui_make_object, 0);
XtManageChild(edit_ui_panel);
n = 0;
XtSetArg(args[n], XmNeditMode, XmMULTI_LINE_EDIT); n++;
XtSetArg(args[n], XmNresizable, True); n++;
XtSetArg(args[n], XmNtopAttachment, XmATTACH_WIDGET); n++;
XtSetArg(args[n], XmNtopWidget, edit_ui_obj_button); n++;
XtSetArg(args[n], XmNleftAttachment, XmATTACH_FORM); n++;
XtSetArg(args[n], XmNrightAttachment, XmATTACH_FORM); n++;
XtSetArg(args[n], XmNleftOffset, 5); n++;
XtSetArg(args[n], XmNrightOffset, 5); n++;
XtSetArg(args[n], XmNtopOffset, 5); n++;
XtSetArg(args[n], XmNrows, 24); n++;
XtSetArg(args[n], XmNcolumns, 80); n++;
edit_ui_textpane = XmCreateScrolledText(edit_ui_panel, "textpane",
args, n);
XtAddCallback(edit_ui_textpane, XmNmodifyVerifyCallback,
text_modify, 0);
edit_ui_message = XtVaCreateManagedWidget("message",
xmLabelWidgetClass, edit_ui_panel,
XmNtopAttachment, XmATTACH_WIDGET,
XmNtopWidget, edit_ui_textpane,
XmNtopOffset, 10,
XmNleftAttachment, XmATTACH_FORM,
XmNleftOffset, 5,
XmNrightAttachment, XmATTACH_FORM,
XmNrightOffset, 5,
XmNbottomAttachment, XmATTACH_FORM,
XmNbottomOffset, 5,
0);
label = XmStringCreateSimple("");
XtVaSetValues(edit_ui_message, XmNlabelString, label, 0);
XmStringFree(label);
XtManageChild(edit_ui_textpane);
XtRealizeWidget(edit_ui_base_window);
}