fileselect.c

#include <gtk/gtk.h>
#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include "logRecorder.c"
#define CHAR_BUF 2000


GtkWidget *window; /* Main gtk window */
GtkTextBuffer *buf; /* Textview buffer */
char *filename;


/* Load the file in the UTF-8 format else error */

static void load_file(char *fname)
{
    FILE *f;
    //char openFile[10] = "file open: ";
    //strcat(openFile,fname);
    //recordLog(1,"client20",openFile,"");
    /* Iterator is an object that represents positions between two characters in a buffer */
    GtkTextIter p;

    char fbuf[CHAR_BUF];
    size_t l; /* read the contents of file in size_t l */

    if(!fname)
    {    /* create file selection dialog */
	GtkWidget *dialog = gtk_file_selection_new("Open File...");
	int resp = gtk_dialog_run(GTK_DIALOG(dialog));
	if(resp == GTK_RESPONSE_OK)
        {
	/* fname contains the file selected by the user */

            /* show the file selection dialog */
	    fname = g_strdup(gtk_file_selection_get_filename(GTK_FILE_SELECTION(dialog)));
	    gtk_widget_destroy(dialog);
	}
	else
        {
            /* cancel */
	    gtk_widget_destroy(dialog);
	    return;
	}
    }

    if(!(f = fopen(fname, "r"))) /* if file cannot be opened */
    {
	g_printerr("%s: %s\n", fname, g_strerror(errno));
	return;
    }


    if(fname != filename)
    {
	gchar *wt = g_strdup_printf("Text Editor (%s)", fname);
	g_free(filename);
	filename = fname;
        /* set titlebar as the file name */
	gtk_window_set_title(GTK_WINDOW(window), wt);
	g_free(wt);
    }

    /* put the ending iterator in p of buffer */
    gtk_text_buffer_get_end_iter(buf, &p);

    while((l = fread(fbuf, 1, sizeof(fbuf), f)) > 0)
    {
        /* only text files in Utf-8 format can be opened */

	GError *err = NULL;
	gsize br, bw;
	gchar *text;
	if(!(text = g_locale_to_utf8(fbuf, l, &br, &bw, &err)))
	{
	    g_printerr("File is not in UTF-8 format : %s\n", err->message);
	    g_clear_error(&err);
            filename = NULL; /* If an invalid file is opened enter the file name as NULL */
	    gtk_window_set_title(GTK_WINDOW(window), "Text Editor (Insert file name)");
	    fclose(f);

	    return;
	}
	gtk_text_buffer_insert(buf, &p, text, bw);
	g_free(text);
    }


    gtk_text_buffer_set_modified(buf, FALSE);

    gtk_text_buffer_get_start_iter(buf, &p);
    gtk_text_buffer_place_cursor(buf, &p);
    if(ferror(f))
    {
	g_printerr("%s: %s\n", fname, g_strerror(errno));
	fclose(f);
	return;
    }
    if(fclose(f) == EOF)
	g_printerr("%s: %s\n", fname, g_strerror(errno));
}



/* save file dialog box */

static gboolean save_file(char *fname)
{
    FILE *f;
    int ok = TRUE;

    if(!fname)
    {
	GtkWidget *dialog = gtk_file_selection_new("Save File As...");
	int resp = gtk_dialog_run(GTK_DIALOG(dialog));
	if(resp == GTK_RESPONSE_OK) {
	    fname = g_strdup(
		gtk_file_selection_get_filename(GTK_FILE_SELECTION(dialog)));
	    gtk_widget_destroy(dialog);
	    char openFile[50] = "new file created : ";    //TODO : get file name and directory separately
	    strcat(openFile,fname);
	    recordLog(1,"client0",openFile,"this was triggered because a new file was created");
	} else {
	    gtk_widget_destroy(dialog);
	    return FALSE;
	}
    }else{
        char openFile[50] = "file modified : ";    //TODO : get file name and directory separately
	    strcat(openFile,fname);
	    recordLog(1,"client0",openFile,"this was triggered because file was modified");
    }

    if(!(f = fopen(fname, "w")))  /* Error opening file */
    {
	g_printerr("%s: %s\n", fname, g_strerror(errno));
	ok = FALSE;
    } else {
	GtkTextIter start, end, p;

        /* get the starting and ending position */

	gtk_text_buffer_get_bounds(GTK_TEXT_BUFFER(buf), &start, &end);
	p = start;
	while(!gtk_text_iter_equal(&start, &end)) {
	    gchar *buf, *fbuf;
	    gsize br, bw;
	    GError *err = NULL;
	    gtk_text_iter_forward_chars(&p, CHAR_BUF);
	    buf = gtk_text_iter_get_slice(&start, &p);
	    fbuf = g_locale_from_utf8(buf, -1, &br, &bw, &err);
	    g_free(buf);

	    if(!fbuf)
            {
		g_printerr("Failed UTF-8 to locale conversion: %s\n",
			   err->message);
		g_clear_error(&err);
		ok = FALSE;
		break;
	    }
	    fwrite(fbuf, bw, 1, f);
	    g_free(fbuf);
	    if(ferror(f)) {
		g_printerr("%s: %s\n", fname, g_strerror(errno));
		ok = FALSE;
		break;
	    }
	    start = p;
	}
	if(fclose(f) == EOF)
        {
	    g_printerr("%s: %s\n", fname, g_strerror(errno));
	    ok = FALSE;
	}
    }

    if(ok)
    {
	gtk_text_buffer_set_modified(buf, FALSE);
	if(fname != filename) {
	    gchar *wt = g_strdup_printf("File open : (%s)", fname);
	    char openFile[50] = "file saved : ";    //TODO : get file name and directory separately
	    strcat(openFile,fname);
	    recordLog(1,"client0",openFile,"this was triggered because a new file was saved in the system");
	    g_free(filename);
	    filename = fname;
	    gtk_window_set_title(GTK_WINDOW(window), wt);
	    g_free(wt);
	}
    }
    return ok;
}

/* if the buffer  is modified then prompt the user to save if he
quits the application or loads a new file */

static gboolean save_if_modified(void)
{
    int resp;
    GtkWidget *dialog;

    if(!gtk_text_buffer_get_modified(GTK_TEXT_BUFFER(buf)))
	return TRUE;

    dialog = gtk_message_dialog_new(GTK_WINDOW(window), 0, GTK_MESSAGE_QUESTION,
				    GTK_BUTTONS_NONE,
				    "Buffer Modified. Do you want to save it now?");

    gtk_dialog_add_buttons(GTK_DIALOG(dialog), GTK_STOCK_YES, GTK_RESPONSE_YES,
			   GTK_STOCK_NO, GTK_RESPONSE_NO,
			   GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL, NULL);
    resp = gtk_dialog_run(GTK_DIALOG(dialog));

    gtk_widget_destroy(dialog);
    switch(resp) {
    case GTK_RESPONSE_YES:  //recordLog(11,"client0",filename,"this log record was created when file is modified");
                            return save_file(filename);

    case GTK_RESPONSE_NO:  return TRUE;

    case GTK_RESPONSE_CANCEL:
    case GTK_RESPONSE_DELETE_EVENT: return FALSE;

    default:
            g_printerr("Error response %d from dialog\n", resp);
	return FALSE;
    }
}