819 lines
20 KiB
C++
819 lines
20 KiB
C++
//
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// "$Id: editor.cxx 9718 2012-11-13 13:03:20Z manolo $"
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//
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// A simple text editor program for the Fast Light Tool Kit (FLTK).
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//
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// This program is described in Chapter 4 of the FLTK Programmer's Guide.
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//
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// Copyright 1998-2010 by Bill Spitzak and others.
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//
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// This library is free software. Distribution and use rights are outlined in
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// the file "COPYING" which should have been included with this file. If this
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// file is missing or damaged, see the license at:
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//
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// http://www.fltk.org/COPYING.php
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//
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// Please report all bugs and problems on the following page:
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//
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// http://www.fltk.org/str.php
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//
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//
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// compile with: g++ editor.cxx -o fltk_editor -lfltk
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//
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//
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// Include necessary headers...
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//
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include <errno.h>
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#ifdef __MWERKS__
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# define FL_DLL
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#endif
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#include <FL/Fl.H>
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#include <FL/Fl_Group.H>
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#include <FL/Fl_Double_Window.H>
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#include <FL/fl_ask.H>
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#include <FL/Fl_Native_File_Chooser.H>
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#include <FL/Fl_Menu_Bar.H>
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#include <FL/Fl_Input.H>
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#include <FL/Fl_Button.H>
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#include <FL/Fl_Return_Button.H>
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#include <FL/Fl_Text_Buffer.H>
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#include <FL/Fl_Text_Editor.H>
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#include <FL/filename.H>
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int changed = 0;
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char filename[FL_PATH_MAX] = "";
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char title[FL_PATH_MAX];
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Fl_Text_Buffer *textbuf = 0;
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// Syntax highlighting stuff...
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#define TS 14 // default editor textsize
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Fl_Text_Buffer *stylebuf = 0;
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Fl_Text_Display::Style_Table_Entry
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styletable[] = { // Style table
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{ FL_BLACK, FL_COURIER, TS }, // A - Plain
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{ FL_DARK_GREEN, FL_HELVETICA_ITALIC, TS }, // B - Line comments
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{ FL_DARK_GREEN, FL_HELVETICA_ITALIC, TS }, // C - Block comments
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{ FL_BLUE, FL_COURIER, TS }, // D - Strings
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{ FL_DARK_RED, FL_COURIER, TS }, // E - Directives
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{ FL_DARK_RED, FL_COURIER_BOLD, TS }, // F - Types
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{ FL_BLUE, FL_COURIER_BOLD, TS }, // G - Keywords
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};
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const char *code_keywords[] = { // List of known C/C++ keywords...
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"and",
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"and_eq",
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"asm",
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"bitand",
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"bitor",
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"break",
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"case",
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"catch",
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"compl",
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"continue",
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"default",
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"delete",
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"do",
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"else",
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"false",
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"for",
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"goto",
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"if",
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"new",
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"not",
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"not_eq",
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"operator",
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"or",
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"or_eq",
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"return",
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"switch",
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"template",
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"this",
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"throw",
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"true",
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"try",
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"while",
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"xor",
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"xor_eq"
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};
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const char *code_types[] = { // List of known C/C++ types...
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"auto",
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"bool",
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"char",
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"class",
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"const",
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"const_cast",
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"double",
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"dynamic_cast",
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"enum",
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"explicit",
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"extern",
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"float",
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"friend",
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"inline",
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"int",
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"long",
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"mutable",
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"namespace",
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"private",
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"protected",
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"public",
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"register",
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"short",
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"signed",
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"sizeof",
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"static",
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"static_cast",
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"struct",
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"template",
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"typedef",
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"typename",
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"union",
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"unsigned",
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"virtual",
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"void",
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"volatile"
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};
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//
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// 'compare_keywords()' - Compare two keywords...
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//
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extern "C" {
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int
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compare_keywords(const void *a,
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const void *b) {
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return (strcmp(*((const char **)a), *((const char **)b)));
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}
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}
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//
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// 'style_parse()' - Parse text and produce style data.
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//
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void
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style_parse(const char *text,
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char *style,
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int length) {
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char current;
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int col;
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int last;
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char buf[255],
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*bufptr;
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const char *temp;
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// Style letters:
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//
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// A - Plain
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// B - Line comments
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// C - Block comments
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// D - Strings
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// E - Directives
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// F - Types
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// G - Keywords
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for (current = *style, col = 0, last = 0; length > 0; length --, text ++) {
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if (current == 'B' || current == 'F' || current == 'G') current = 'A';
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if (current == 'A') {
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// Check for directives, comments, strings, and keywords...
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if (col == 0 && *text == '#') {
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// Set style to directive
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current = 'E';
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} else if (strncmp(text, "//", 2) == 0) {
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current = 'B';
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for (; length > 0 && *text != '\n'; length --, text ++) *style++ = 'B';
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if (length == 0) break;
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} else if (strncmp(text, "/*", 2) == 0) {
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current = 'C';
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} else if (strncmp(text, "\\\"", 2) == 0) {
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// Quoted quote...
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*style++ = current;
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*style++ = current;
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text ++;
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length --;
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col += 2;
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continue;
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} else if (*text == '\"') {
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current = 'D';
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} else if (!last && (islower((*text)&255) || *text == '_')) {
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// Might be a keyword...
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for (temp = text, bufptr = buf;
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(islower((*temp)&255) || *temp == '_') && bufptr < (buf + sizeof(buf) - 1);
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*bufptr++ = *temp++);
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if (!islower((*temp)&255) && *temp != '_') {
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*bufptr = '\0';
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bufptr = buf;
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if (bsearch(&bufptr, code_types,
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sizeof(code_types) / sizeof(code_types[0]),
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sizeof(code_types[0]), compare_keywords)) {
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while (text < temp) {
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*style++ = 'F';
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text ++;
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length --;
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col ++;
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}
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text --;
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length ++;
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last = 1;
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continue;
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} else if (bsearch(&bufptr, code_keywords,
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sizeof(code_keywords) / sizeof(code_keywords[0]),
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sizeof(code_keywords[0]), compare_keywords)) {
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while (text < temp) {
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*style++ = 'G';
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text ++;
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length --;
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col ++;
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}
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text --;
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length ++;
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last = 1;
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continue;
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}
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}
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}
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} else if (current == 'C' && strncmp(text, "*/", 2) == 0) {
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// Close a C comment...
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*style++ = current;
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*style++ = current;
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text ++;
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length --;
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current = 'A';
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col += 2;
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continue;
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} else if (current == 'D') {
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// Continuing in string...
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if (strncmp(text, "\\\"", 2) == 0) {
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// Quoted end quote...
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*style++ = current;
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*style++ = current;
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text ++;
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length --;
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col += 2;
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continue;
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} else if (*text == '\"') {
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// End quote...
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*style++ = current;
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col ++;
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current = 'A';
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continue;
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}
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}
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// Copy style info...
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if (current == 'A' && (*text == '{' || *text == '}')) *style++ = 'G';
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else *style++ = current;
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col ++;
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last = isalnum((*text)&255) || *text == '_' || *text == '.';
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if (*text == '\n') {
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// Reset column and possibly reset the style
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col = 0;
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if (current == 'B' || current == 'E') current = 'A';
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}
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}
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}
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//
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// 'style_init()' - Initialize the style buffer...
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//
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void
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style_init(void) {
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char *style = new char[textbuf->length() + 1];
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char *text = textbuf->text();
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memset(style, 'A', textbuf->length());
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style[textbuf->length()] = '\0';
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if (!stylebuf) stylebuf = new Fl_Text_Buffer(textbuf->length());
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style_parse(text, style, textbuf->length());
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stylebuf->text(style);
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delete[] style;
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free(text);
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}
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//
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// 'style_unfinished_cb()' - Update unfinished styles.
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//
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void
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style_unfinished_cb(int, void*) {
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}
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//
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// 'style_update()' - Update the style buffer...
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//
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void
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style_update(int pos, // I - Position of update
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int nInserted, // I - Number of inserted chars
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int nDeleted, // I - Number of deleted chars
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int /*nRestyled*/, // I - Number of restyled chars
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const char * /*deletedText*/,// I - Text that was deleted
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void *cbArg) { // I - Callback data
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int start, // Start of text
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end; // End of text
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char last, // Last style on line
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*style, // Style data
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*text; // Text data
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// If this is just a selection change, just unselect the style buffer...
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if (nInserted == 0 && nDeleted == 0) {
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stylebuf->unselect();
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return;
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}
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// Track changes in the text buffer...
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if (nInserted > 0) {
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// Insert characters into the style buffer...
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style = new char[nInserted + 1];
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memset(style, 'A', nInserted);
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style[nInserted] = '\0';
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stylebuf->replace(pos, pos + nDeleted, style);
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delete[] style;
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} else {
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// Just delete characters in the style buffer...
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stylebuf->remove(pos, pos + nDeleted);
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}
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// Select the area that was just updated to avoid unnecessary
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// callbacks...
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stylebuf->select(pos, pos + nInserted - nDeleted);
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// Re-parse the changed region; we do this by parsing from the
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// beginning of the previous line of the changed region to the end of
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// the line of the changed region... Then we check the last
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// style character and keep updating if we have a multi-line
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// comment character...
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start = textbuf->line_start(pos);
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// if (start > 0) start = textbuf->line_start(start - 1);
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end = textbuf->line_end(pos + nInserted);
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text = textbuf->text_range(start, end);
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style = stylebuf->text_range(start, end);
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if (start==end)
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last = 0;
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else
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last = style[end - start - 1];
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// printf("start = %d, end = %d, text = \"%s\", style = \"%s\", last='%c'...\n",
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// start, end, text, style, last);
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style_parse(text, style, end - start);
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// printf("new style = \"%s\", new last='%c'...\n",
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// style, style[end - start - 1]);
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stylebuf->replace(start, end, style);
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((Fl_Text_Editor *)cbArg)->redisplay_range(start, end);
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if (start==end || last != style[end - start - 1]) {
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// printf("Recalculate the rest of the buffer style\n");
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// Either the user deleted some text, or the last character
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// on the line changed styles, so reparse the
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// remainder of the buffer...
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free(text);
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free(style);
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end = textbuf->length();
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text = textbuf->text_range(start, end);
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style = stylebuf->text_range(start, end);
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style_parse(text, style, end - start);
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stylebuf->replace(start, end, style);
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((Fl_Text_Editor *)cbArg)->redisplay_range(start, end);
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}
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free(text);
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free(style);
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}
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// Editor window functions and class...
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void save_cb();
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void saveas_cb();
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void find2_cb(Fl_Widget*, void*);
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void replall_cb(Fl_Widget*, void*);
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void replace2_cb(Fl_Widget*, void*);
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void replcan_cb(Fl_Widget*, void*);
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class EditorWindow : public Fl_Double_Window {
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public:
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EditorWindow(int w, int h, const char* t);
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~EditorWindow();
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Fl_Window *replace_dlg;
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Fl_Input *replace_find;
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Fl_Input *replace_with;
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Fl_Button *replace_all;
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Fl_Return_Button *replace_next;
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Fl_Button *replace_cancel;
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Fl_Text_Editor *editor;
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char search[256];
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};
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EditorWindow::EditorWindow(int w, int h, const char* t) : Fl_Double_Window(w, h, t) {
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replace_dlg = new Fl_Window(300, 105, "Replace");
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replace_find = new Fl_Input(80, 10, 210, 25, "Find:");
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replace_find->align(FL_ALIGN_LEFT);
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replace_with = new Fl_Input(80, 40, 210, 25, "Replace:");
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replace_with->align(FL_ALIGN_LEFT);
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replace_all = new Fl_Button(10, 70, 90, 25, "Replace All");
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replace_all->callback((Fl_Callback *)replall_cb, this);
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replace_next = new Fl_Return_Button(105, 70, 120, 25, "Replace Next");
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replace_next->callback((Fl_Callback *)replace2_cb, this);
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replace_cancel = new Fl_Button(230, 70, 60, 25, "Cancel");
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replace_cancel->callback((Fl_Callback *)replcan_cb, this);
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replace_dlg->end();
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replace_dlg->set_non_modal();
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editor = 0;
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*search = (char)0;
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}
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EditorWindow::~EditorWindow() {
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delete replace_dlg;
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}
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int check_save(void) {
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if (!changed) return 1;
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int r = fl_choice("The current file has not been saved.\n"
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"Would you like to save it now?",
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"Cancel", "Save", "Don't Save");
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if (r == 1) {
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save_cb(); // Save the file...
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return !changed;
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}
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return (r == 2) ? 1 : 0;
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}
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int loading = 0;
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void load_file(const char *newfile, int ipos) {
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loading = 1;
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int insert = (ipos != -1);
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changed = insert;
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if (!insert) strcpy(filename, "");
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int r;
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if (!insert) r = textbuf->loadfile(newfile);
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else r = textbuf->insertfile(newfile, ipos);
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changed = changed || textbuf->input_file_was_transcoded;
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if (r)
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fl_alert("Error reading from file \'%s\':\n%s.", newfile, strerror(errno));
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else
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if (!insert) strcpy(filename, newfile);
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loading = 0;
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textbuf->call_modify_callbacks();
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}
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void save_file(const char *newfile) {
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if (textbuf->savefile(newfile))
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fl_alert("Error writing to file \'%s\':\n%s.", newfile, strerror(errno));
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else
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strcpy(filename, newfile);
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changed = 0;
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textbuf->call_modify_callbacks();
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}
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void copy_cb(Fl_Widget*, void* v) {
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EditorWindow* e = (EditorWindow*)v;
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Fl_Text_Editor::kf_copy(0, e->editor);
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}
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void cut_cb(Fl_Widget*, void* v) {
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EditorWindow* e = (EditorWindow*)v;
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Fl_Text_Editor::kf_cut(0, e->editor);
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}
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void delete_cb(Fl_Widget*, void*) {
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textbuf->remove_selection();
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}
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void find_cb(Fl_Widget* w, void* v) {
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EditorWindow* e = (EditorWindow*)v;
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const char *val;
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val = fl_input("Search String:", e->search);
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if (val != NULL) {
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// User entered a string - go find it!
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strcpy(e->search, val);
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find2_cb(w, v);
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}
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}
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void find2_cb(Fl_Widget* w, void* v) {
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EditorWindow* e = (EditorWindow*)v;
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if (e->search[0] == '\0') {
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// Search string is blank; get a new one...
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find_cb(w, v);
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return;
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}
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int pos = e->editor->insert_position();
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int found = textbuf->search_forward(pos, e->search, &pos);
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if (found) {
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// Found a match; select and update the position...
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textbuf->select(pos, pos+strlen(e->search));
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e->editor->insert_position(pos+strlen(e->search));
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e->editor->show_insert_position();
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}
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else fl_alert("No occurrences of \'%s\' found!", e->search);
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}
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void set_title(Fl_Window* w) {
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if (filename[0] == '\0') strcpy(title, "Untitled");
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else {
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char *slash;
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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;
|
|
Fl_Native_File_Chooser fnfc;
|
|
fnfc.title("Open file");
|
|
fnfc.type(Fl_Native_File_Chooser::BROWSE_FILE);
|
|
if ( fnfc.show() ) return;
|
|
load_file(fnfc.filename(), -1);
|
|
|
|
}
|
|
|
|
void insert_cb(Fl_Widget*, void *v) {
|
|
Fl_Native_File_Chooser fnfc;
|
|
fnfc.title("Insert file");
|
|
fnfc.type(Fl_Native_File_Chooser::BROWSE_FILE);
|
|
if ( fnfc.show() ) return;
|
|
EditorWindow *w = (EditorWindow *)v;
|
|
load_file(fnfc.filename(), 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) {
|
|
EditorWindow* w = (EditorWindow*)v;
|
|
|
|
if (num_windows == 1) {
|
|
if (!check_save())
|
|
return;
|
|
}
|
|
|
|
w->hide();
|
|
w->editor->buffer(0);
|
|
textbuf->remove_modify_callback(style_update, w->editor);
|
|
textbuf->remove_modify_callback(changed_cb, w);
|
|
Fl::delete_widget(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() {
|
|
Fl_Native_File_Chooser fnfc;
|
|
fnfc.title("Save File As?");
|
|
fnfc.type(Fl_Native_File_Chooser::BROWSE_SAVE_FILE);
|
|
if ( fnfc.show() ) return;
|
|
save_file(fnfc.filename());
|
|
}
|
|
|
|
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_COMMAND + 'o', (Fl_Callback *)open_cb },
|
|
{ "&Insert File...", FL_COMMAND + 'i', (Fl_Callback *)insert_cb, 0, FL_MENU_DIVIDER },
|
|
{ "&Save File", FL_COMMAND + 's', (Fl_Callback *)save_cb },
|
|
{ "Save File &As...", FL_COMMAND + FL_SHIFT + 's', (Fl_Callback *)saveas_cb, 0, FL_MENU_DIVIDER },
|
|
{ "New &View", FL_ALT
|
|
#ifdef __APPLE__
|
|
+ FL_COMMAND
|
|
#endif
|
|
+ 'v', (Fl_Callback *)view_cb, 0 },
|
|
{ "&Close View", FL_COMMAND + 'w', (Fl_Callback *)close_cb, 0, FL_MENU_DIVIDER },
|
|
{ "E&xit", FL_COMMAND + 'q', (Fl_Callback *)quit_cb, 0 },
|
|
{ 0 },
|
|
|
|
{ "&Edit", 0, 0, 0, FL_SUBMENU },
|
|
{ "Cu&t", FL_COMMAND + 'x', (Fl_Callback *)cut_cb },
|
|
{ "&Copy", FL_COMMAND + 'c', (Fl_Callback *)copy_cb },
|
|
{ "&Paste", FL_COMMAND + 'v', (Fl_Callback *)paste_cb },
|
|
{ "&Delete", 0, (Fl_Callback *)delete_cb },
|
|
{ 0 },
|
|
|
|
{ "&Search", 0, 0, 0, FL_SUBMENU },
|
|
{ "&Find...", FL_COMMAND + 'f', (Fl_Callback *)find_cb },
|
|
{ "F&ind Again", FL_COMMAND + 'g', find2_cb },
|
|
{ "&Replace...", FL_COMMAND + 'r', replace_cb },
|
|
{ "Re&place Again", FL_COMMAND + '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->textfont(FL_COURIER);
|
|
w->editor->textsize(TS);
|
|
//w->editor->wrap_mode(Fl_Text_Editor::WRAP_AT_BOUNDS, 250);
|
|
w->editor->buffer(textbuf);
|
|
w->editor->highlight_data(stylebuf, styletable,
|
|
sizeof(styletable) / sizeof(styletable[0]),
|
|
'A', style_unfinished_cb, 0);
|
|
textbuf->text();
|
|
style_init();
|
|
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;
|
|
}
|
|
|
|
void cb(const char *fname) {
|
|
load_file(fname, -1);
|
|
}
|
|
|
|
int main(int argc, char **argv) {
|
|
textbuf = new Fl_Text_Buffer;
|
|
//textbuf->transcoding_warning_action = NULL;
|
|
style_init();
|
|
fl_open_callback(cb);
|
|
|
|
Fl_Window* window = new_view();
|
|
|
|
window->show(1, argv);
|
|
#ifndef __APPLE__
|
|
if (argc > 1) load_file(argv[1], -1);
|
|
#endif
|
|
|
|
return Fl::run();
|
|
}
|
|
|
|
//
|
|
// End of "$Id: editor.cxx 9718 2012-11-13 13:03:20Z manolo $".
|
|
//
|