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fltk/test/editor.cxx
Michael R Sweet a3d0905c9e Copyright updates and prep for 1.1.5rc1. 
git-svn-id: file:///fltk/svn/fltk/branches/branch-1.1@3391 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
2004-04-11 04:39:01 +00:00

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//
// "$Id: editor.cxx,v 1.2.2.3.2.18 2004/04/11 04:39:01 easysw Exp $"
//
// A simple text editor program for the Fast Light Tool Kit (FLTK).
//
// This program is described in Chapter 4 of the FLTK Programmer's Guide.
//
// Copyright 1998-2004 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@fltk.org".
//
//
// Include necessary headers...
//
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>
#ifdef __MWERKS__
# define FL_DLL
#endif
#include <FL/Fl.H>
#include <FL/Fl_Group.H>
#include <FL/Fl_Double_Window.H>
#include <FL/fl_ask.H>
#include <FL/Fl_File_Chooser.H>
#include <FL/Fl_Menu_Bar.H>
#include <FL/Fl_Input.H>
#include <FL/Fl_Button.H>
#include <FL/Fl_Return_Button.H>
#include <FL/Fl_Text_Buffer.H>
#include <FL/Fl_Text_Editor.H>
int changed = 0;
char filename[256] = "";
char title[256];
Fl_Text_Buffer *textbuf = 0;
// Syntax highlighting stuff...
Fl_Text_Buffer *stylebuf = 0;
Fl_Text_Display::Style_Table_Entry
styletable[] = { // Style table
{ FL_BLACK, FL_COURIER, 14 }, // A - Plain
{ FL_DARK_GREEN, FL_COURIER_ITALIC, 14 }, // B - Line comments
{ FL_DARK_GREEN, FL_COURIER_ITALIC, 14 }, // C - Block comments
{ FL_BLUE, FL_COURIER, 14 }, // D - Strings
{ FL_DARK_RED, FL_COURIER, 14 }, // E - Directives
{ FL_DARK_RED, FL_COURIER_BOLD, 14 }, // F - Types
{ FL_BLUE, FL_COURIER_BOLD, 14 } // G - Keywords
};
const char *code_keywords[] = { // List of known C/C++ keywords...
"and",
"and_eq",
"asm",
"bitand",
"bitor",
"break",
"case",
"catch",
"compl",
"continue",
"default",
"delete",
"do",
"else",
"false",
"for",
"goto",
"if",
"new",
"not",
"not_eq",
"operator",
"or",
"or_eq",
"return",
"switch",
"template",
"this",
"throw",
"true",
"try",
"while",
"xor",
"xor_eq"
};
const char *code_types[] = { // List of known C/C++ types...
"auto",
"bool",
"char",
"class",
"const",
"const_cast",
"double",
"dynamic_cast",
"enum",
"explicit",
"extern",
"float",
"friend",
"inline",
"int",
"long",
"mutable",
"namespace",
"private",
"protected",
"public",
"register",
"short",
"signed",
"sizeof",
"static",
"static_cast",
"struct",
"template",
"typedef",
"typename",
"union",
"unsigned",
"virtual",
"void",
"volatile"
};
//
// 'compare_keywords()' - Compare two keywords...
//
int
compare_keywords(const void *a,
const void *b) {
return (strcmp(*((const char **)a), *((const char **)b)));
}
//
// 'style_parse()' - Parse text and produce style data.
//
void
style_parse(const char *text,
char *style,
int length) {
char current;
int col;
int last;
char buf[255],
*bufptr;
const char *temp;
for (current = *style, col = 0, last = 0; length > 0; length --, text ++) {
if (current == 'B') current = 'A';
if (current == 'A') {
// Check for directives, comments, strings, and keywords...
if (col == 0 && *text == '#') {
// Set style to directive
current = 'E';
} else if (strncmp(text, "//", 2) == 0) {
current = 'B';
for (; length > 0 && *text != '\n'; length --, text ++) *style++ = 'B';
if (length == 0) break;
} else if (strncmp(text, "/*", 2) == 0) {
current = 'C';
} else if (strncmp(text, "\\\"", 2) == 0) {
// Quoted quote...
*style++ = current;
*style++ = current;
text ++;
length --;
col += 2;
continue;
} else if (*text == '\"') {
current = 'D';
} else if (!last && islower(*text)) {
// Might be a keyword...
for (temp = text, bufptr = buf;
islower(*temp) && bufptr < (buf + sizeof(buf) - 1);
*bufptr++ = *temp++);
if (!islower(*temp)) {
*bufptr = '\0';
bufptr = buf;
if (bsearch(&bufptr, code_types,
sizeof(code_types) / sizeof(code_types[0]),
sizeof(code_types[0]), compare_keywords)) {
while (text < temp) {
*style++ = 'F';
text ++;
length --;
col ++;
}
text --;
length ++;
last = 1;
continue;
} else if (bsearch(&bufptr, code_keywords,
sizeof(code_keywords) / sizeof(code_keywords[0]),
sizeof(code_keywords[0]), compare_keywords)) {
while (text < temp) {
*style++ = 'G';
text ++;
length --;
col ++;
}
text --;
length ++;
last = 1;
continue;
}
}
}
} else if (current == 'C' && strncmp(text, "*/", 2) == 0) {
// Close a C comment...
*style++ = current;
*style++ = current;
text ++;
length --;
current = 'A';
col += 2;
continue;
} else if (current == 'D') {
// Continuing in string...
if (strncmp(text, "\\\"", 2) == 0) {
// Quoted end quote...
*style++ = current;
*style++ = current;
text ++;
length --;
col += 2;
continue;
} else if (*text == '\"') {
// End quote...
*style++ = current;
col ++;
current = 'A';
continue;
}
}
// Copy style info...
if (current == 'A' && (*text == '{' || *text == '}')) *style++ = 'G';
else *style++ = current;
col ++;
last = isalnum(*text) || *text == '.';
if (*text == '\n') {
// Reset column and possibly reset the style
col = 0;
if (current == 'B' || current == 'E') current = 'A';
}
}
}
//
// 'style_init()' - Initialize the style buffer...
//
void
style_init(void) {
char *style = new char[textbuf->length() + 1];
char *text = textbuf->text();
memset(style, 'A', textbuf->length());
style[textbuf->length()] = '\0';
if (!stylebuf) stylebuf = new Fl_Text_Buffer(textbuf->length());
style_parse(text, style, textbuf->length());
stylebuf->text(style);
delete[] style;
free(text);
}
//
// 'style_unfinished_cb()' - Update unfinished styles.
//
void
style_unfinished_cb(int, void*) {
}
//
// 'style_update()' - Update the style buffer...
//
void
style_update(int pos, // I - Position of update
int nInserted, // I - Number of inserted chars
int nDeleted, // I - Number of deleted chars
int /*nRestyled*/, // I - Number of restyled chars
const char * /*deletedText*/,// I - Text that was deleted
void *cbArg) { // I - Callback data
int start, // Start of text
end; // End of text
char last, // Last style on line
*style, // Style data
*text; // Text data
// If this is just a selection change, just unselect the style buffer...
if (nInserted == 0 && nDeleted == 0) {
stylebuf->unselect();
return;
}
// Track changes in the text buffer...
if (nInserted > 0) {
// Insert characters into the style buffer...
style = new char[nInserted + 1];
memset(style, 'A', nInserted);
style[nInserted] = '\0';
stylebuf->replace(pos, pos + nDeleted, style);
delete[] style;
} else {
// Just delete characters in the style buffer...
stylebuf->remove(pos, pos + nDeleted);
}
// Select the area that was just updated to avoid unnecessary
// callbacks...
stylebuf->select(pos, pos + nInserted - nDeleted);
// Re-parse the changed region; we do this by parsing from the
// beginning of the line of the changed region to the end of
// the line of the changed region... Then we check the last
// style character and keep updating if we have a multi-line
// comment character...
start = textbuf->line_start(pos);
end = textbuf->line_end(pos + nInserted);
text = textbuf->text_range(start, end);
style = stylebuf->text_range(start, end);
last = style[end - start - 1];
// printf("start = %d, end = %d, text = \"%s\", style = \"%s\"...\n",
// start, end, text, style);
style_parse(text, style, end - start);
// printf("new style = \"%s\"...\n", style);
stylebuf->replace(start, end, style);
((Fl_Text_Editor *)cbArg)->redisplay_range(start, end);
if (last != style[end - start - 1]) {
// The last character on the line changed styles, so reparse the
// remainder of the buffer...
free(text);
free(style);
end = textbuf->length();
text = textbuf->text_range(start, end);
style = stylebuf->text_range(start, end);
style_parse(text, style, end - start);
stylebuf->replace(start, end, style);
((Fl_Text_Editor *)cbArg)->redisplay_range(start, end);
}
free(text);
free(style);
}
// Editor window functions and class...
void save_cb();
void saveas_cb();
void find2_cb(Fl_Widget*, void*);
void replall_cb(Fl_Widget*, void*);
void replace2_cb(Fl_Widget*, void*);
void replcan_cb(Fl_Widget*, void*);
class EditorWindow : public Fl_Double_Window {
public:
EditorWindow(int w, int h, const char* t);
~EditorWindow();
Fl_Window *replace_dlg;
Fl_Input *replace_find;
Fl_Input *replace_with;
Fl_Button *replace_all;
Fl_Return_Button *replace_next;
Fl_Button *replace_cancel;
Fl_Text_Editor *editor;
char search[256];
};
EditorWindow::EditorWindow(int w, int h, const char* t) : Fl_Double_Window(w, h, t) {
replace_dlg = new Fl_Window(300, 105, "Replace");
replace_find = new Fl_Input(80, 10, 210, 25, "Find:");
replace_find->align(FL_ALIGN_LEFT);
replace_with = new Fl_Input(80, 40, 210, 25, "Replace:");
replace_with->align(FL_ALIGN_LEFT);
replace_all = new Fl_Button(10, 70, 90, 25, "Replace All");
replace_all->callback((Fl_Callback *)replall_cb, this);
replace_next = new Fl_Return_Button(105, 70, 120, 25, "Replace Next");
replace_next->callback((Fl_Callback *)replace2_cb, this);
replace_cancel = new Fl_Button(230, 70, 60, 25, "Cancel");
replace_cancel->callback((Fl_Callback *)replcan_cb, this);
replace_dlg->end();
replace_dlg->set_non_modal();
editor = 0;
*search = (char)0;
}
EditorWindow::~EditorWindow() {
delete replace_dlg;
}
int check_save(void) {
if (!changed) return 1;
int r = fl_choice("The current file has not been saved.\n"
"Would you like to save it now?",
"Cancel", "Save", "Discard");
if (r == 1) {
save_cb(); // Save the file...
return !changed;
}
return (r == 2) ? 1 : 0;
}
int loading = 0;
void load_file(char *newfile, int ipos) {
loading = 1;
int insert = (ipos != -1);
changed = insert;
if (!insert) strcpy(filename, "");
int r;
if (!insert) r = textbuf->loadfile(newfile);
else r = textbuf->insertfile(newfile, ipos);
if (r)
fl_alert("Error reading from file \'%s\':\n%s.", newfile, strerror(errno));
else
if (!insert) strcpy(filename, newfile);
loading = 0;
textbuf->call_modify_callbacks();
}
void save_file(char *newfile) {
if (textbuf->savefile(newfile))
fl_alert("Error writing to file \'%s\':\n%s.", newfile, strerror(errno));
else
strcpy(filename, newfile);
changed = 0;
textbuf->call_modify_callbacks();
}
void copy_cb(Fl_Widget*, void* v) {
EditorWindow* e = (EditorWindow*)v;
Fl_Text_Editor::kf_copy(0, e->editor);
}
void cut_cb(Fl_Widget*, void* v) {
EditorWindow* e = (EditorWindow*)v;
Fl_Text_Editor::kf_cut(0, e->editor);
}
void delete_cb(Fl_Widget*, void*) {
textbuf->remove_selection();
}
void find_cb(Fl_Widget* w, void* v) {
EditorWindow* e = (EditorWindow*)v;
const char *val;
val = fl_input("Search String:", e->search);
if (val != NULL) {
// User entered a string - go find it!
strcpy(e->search, val);
find2_cb(w, v);
}
}
void find2_cb(Fl_Widget* w, void* v) {
EditorWindow* e = (EditorWindow*)v;
if (e->search[0] == '\0') {
// Search string is blank; get a new one...
find_cb(w, v);
return;
}
int pos = e->editor->insert_position();
int found = textbuf->search_forward(pos, e->search, &pos);
if (found) {
// Found a match; select and update the position...
textbuf->select(pos, pos+strlen(e->search));
e->editor->insert_position(pos+strlen(e->search));
e->editor->show_insert_position();
}
else fl_alert("No occurrences of \'%s\' found!", e->search);
}
void set_title(Fl_Window* w) {
if (filename[0] == '\0') strcpy(title, "Untitled");
else {
char *slash;
slash = strrchr(filename, '/');
#ifdef WIN32
if (slash == NULL) slash = strrchr(filename, '\\');
#endif
if (slash != NULL) strcpy(title, slash + 1);
else strcpy(title, filename);
}
if (changed) strcat(title, " (modified)");
w->label(title);
}
void changed_cb(int, int nInserted, int nDeleted,int, const char*, void* v) {
if ((nInserted || nDeleted) && !loading) changed = 1;
EditorWindow *w = (EditorWindow *)v;
set_title(w);
if (loading) w->editor->show_insert_position();
}
void new_cb(Fl_Widget*, void*) {
if (!check_save()) return;
filename[0] = '\0';
textbuf->select(0, textbuf->length());
textbuf->remove_selection();
changed = 0;
textbuf->call_modify_callbacks();
}
void open_cb(Fl_Widget*, void*) {
if (!check_save()) return;
char *newfile = fl_file_chooser("Open File?", "*", filename);
if (newfile != NULL) load_file(newfile, -1);
}
void insert_cb(Fl_Widget*, void *v) {
char *newfile = fl_file_chooser("Insert File?", "*", filename);
EditorWindow *w = (EditorWindow *)v;
if (newfile != NULL) load_file(newfile, w->editor->insert_position());
}
void paste_cb(Fl_Widget*, void* v) {
EditorWindow* e = (EditorWindow*)v;
Fl_Text_Editor::kf_paste(0, e->editor);
}
int num_windows = 0;
void close_cb(Fl_Widget*, void* v) {
Fl_Window* w = (Fl_Window*)v;
if (num_windows == 1 && !check_save()) {
return;
}
w->hide();
textbuf->remove_modify_callback(changed_cb, w);
delete w;
num_windows--;
if (!num_windows) exit(0);
}
void quit_cb(Fl_Widget*, void*) {
if (changed && !check_save())
return;
exit(0);
}
void replace_cb(Fl_Widget*, void* v) {
EditorWindow* e = (EditorWindow*)v;
e->replace_dlg->show();
}
void replace2_cb(Fl_Widget*, void* v) {
EditorWindow* e = (EditorWindow*)v;
const char *find = e->replace_find->value();
const char *replace = e->replace_with->value();
if (find[0] == '\0') {
// Search string is blank; get a new one...
e->replace_dlg->show();
return;
}
e->replace_dlg->hide();
int pos = e->editor->insert_position();
int found = textbuf->search_forward(pos, find, &pos);
if (found) {
// Found a match; update the position and replace text...
textbuf->select(pos, pos+strlen(find));
textbuf->remove_selection();
textbuf->insert(pos, replace);
textbuf->select(pos, pos+strlen(replace));
e->editor->insert_position(pos+strlen(replace));
e->editor->show_insert_position();
}
else fl_alert("No occurrences of \'%s\' found!", find);
}
void replall_cb(Fl_Widget*, void* v) {
EditorWindow* e = (EditorWindow*)v;
const char *find = e->replace_find->value();
const char *replace = e->replace_with->value();
find = e->replace_find->value();
if (find[0] == '\0') {
// Search string is blank; get a new one...
e->replace_dlg->show();
return;
}
e->replace_dlg->hide();
e->editor->insert_position(0);
int times = 0;
// Loop through the whole string
for (int found = 1; found;) {
int pos = e->editor->insert_position();
found = textbuf->search_forward(pos, find, &pos);
if (found) {
// Found a match; update the position and replace text...
textbuf->select(pos, pos+strlen(find));
textbuf->remove_selection();
textbuf->insert(pos, replace);
e->editor->insert_position(pos+strlen(replace));
e->editor->show_insert_position();
times++;
}
}
if (times) fl_message("Replaced %d occurrences.", times);
else fl_alert("No occurrences of \'%s\' found!", find);
}
void replcan_cb(Fl_Widget*, void* v) {
EditorWindow* e = (EditorWindow*)v;
e->replace_dlg->hide();
}
void save_cb() {
if (filename[0] == '\0') {
// No filename - get one!
saveas_cb();
return;
}
else save_file(filename);
}
void saveas_cb() {
char *newfile;
newfile = fl_file_chooser("Save File As?", "*", filename);
if (newfile != NULL) save_file(newfile);
}
Fl_Window* new_view();
void view_cb(Fl_Widget*, void*) {
Fl_Window* w = new_view();
w->show();
}
Fl_Menu_Item menuitems[] = {
{ "&File", 0, 0, 0, FL_SUBMENU },
{ "&New File", 0, (Fl_Callback *)new_cb },
{ "&Open File...", FL_CTRL + 'o', (Fl_Callback *)open_cb },
{ "&Insert File...", FL_CTRL + 'i', (Fl_Callback *)insert_cb, 0, FL_MENU_DIVIDER },
{ "&Save File", FL_CTRL + 's', (Fl_Callback *)save_cb },
{ "Save File &As...", FL_CTRL + FL_SHIFT + 's', (Fl_Callback *)saveas_cb, 0, FL_MENU_DIVIDER },
{ "New &View", FL_ALT + 'v', (Fl_Callback *)view_cb, 0 },
{ "&Close View", FL_CTRL + 'w', (Fl_Callback *)close_cb, 0, FL_MENU_DIVIDER },
{ "E&xit", FL_CTRL + 'q', (Fl_Callback *)quit_cb, 0 },
{ 0 },
{ "&Edit", 0, 0, 0, FL_SUBMENU },
{ "Cu&t", FL_CTRL + 'x', (Fl_Callback *)cut_cb },
{ "&Copy", FL_CTRL + 'c', (Fl_Callback *)copy_cb },
{ "&Paste", FL_CTRL + 'v', (Fl_Callback *)paste_cb },
{ "&Delete", 0, (Fl_Callback *)delete_cb },
{ 0 },
{ "&Search", 0, 0, 0, FL_SUBMENU },
{ "&Find...", FL_CTRL + 'f', (Fl_Callback *)find_cb },
{ "F&ind Again", FL_CTRL + 'g', find2_cb },
{ "&Replace...", FL_CTRL + 'r', replace_cb },
{ "Re&place Again", FL_CTRL + 't', replace2_cb },
{ 0 },
{ 0 }
};
Fl_Window* new_view() {
EditorWindow* w = new EditorWindow(660, 400, title);
w->begin();
Fl_Menu_Bar* m = new Fl_Menu_Bar(0, 0, 660, 30);
m->copy(menuitems, w);
w->editor = new Fl_Text_Editor(0, 30, 660, 370);
w->editor->buffer(textbuf);
w->editor->highlight_data(stylebuf, styletable,
sizeof(styletable) / sizeof(styletable[0]),
'A', style_unfinished_cb, 0);
w->editor->textfont(FL_COURIER);
w->end();
w->resizable(w->editor);
w->callback((Fl_Callback *)close_cb, w);
textbuf->add_modify_callback(style_update, w->editor);
textbuf->add_modify_callback(changed_cb, w);
textbuf->call_modify_callbacks();
num_windows++;
return w;
}
int main(int argc, char **argv) {
textbuf = new Fl_Text_Buffer;
style_init();
Fl_Window* window = new_view();
window->show(1, argv);
if (argc > 1) load_file(argv[1], -1);
return Fl::run();
}
//
// End of "$Id: editor.cxx,v 1.2.2.3.2.18 2004/04/11 04:39:01 easysw Exp $".
//
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