ui/gtk/text.c

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 2014 Olaf Wintermann. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *   1. Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
 *
 *   2. Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions and the following disclaimer in the
 *      documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <stdio.h>
#include <stdlib.h>

#include "text.h"
#include "container.h"

UIWIDGET ui_textarea(UiObject *obj, UiText *value) {
    GtkWidget *text_area = gtk_text_view_new();
    gtk_text_view_set_wrap_mode(GTK_TEXT_VIEW(text_area), GTK_WRAP_WORD_CHAR);
    g_signal_connect(
                text_area,
                "realize",
                G_CALLBACK(ui_textarea_realize_event),
                NULL);
    
    GtkWidget *scroll_area = gtk_scrolled_window_new (NULL, NULL);
    gtk_scrolled_window_set_policy(
            GTK_SCROLLED_WINDOW(scroll_area),
            GTK_POLICY_AUTOMATIC,
            GTK_POLICY_AUTOMATIC); // GTK_POLICY_ALWAYS  
    gtk_container_add(GTK_CONTAINER(scroll_area), text_area);
    
    // font and padding
    PangoFontDescription *font;
    font = pango_font_description_from_string("Monospace");
    gtk_widget_modify_font(text_area, font);
    pango_font_description_free(font);
    
    gtk_text_view_set_left_margin(GTK_TEXT_VIEW(text_area), 2);
    gtk_text_view_set_right_margin(GTK_TEXT_VIEW(text_area), 2);
    
    // add
    UiContainer *ct = uic_get_current_container(obj);
    ct->add(ct, scroll_area);
    
    // bind value
    if(value) {
        value->get = ui_textarea_get;
        value->set = ui_textarea_set;
        value->value = NULL;
        GtkTextBuffer *buf = gtk_text_view_get_buffer(GTK_TEXT_VIEW(text_area));
        value->obj = buf;
        
        // register undo manager
        g_signal_connect(
                buf,
                "insert-text",
                G_CALLBACK(ui_textbuf_insert),
                NULL);
        g_signal_connect(
                buf,
                "delete-range",
                G_CALLBACK(ui_textbuf_delete),
                NULL);
    }
    
    return scroll_area;
}

char* ui_textarea_get(UiText *text) {
    if(text->value) {
        g_free(text->value);
    }
    GtkTextBuffer *buf = text->obj;
    GtkTextIter start;
    GtkTextIter end;
    gtk_text_buffer_get_bounds(buf, &start, &end);
    char *str = gtk_text_buffer_get_text(buf, &start, &end, FALSE);
    text->value = str;
    return str;
}

void ui_textarea_set(UiText *text, char *str) {
    if(text->value) {
        g_free(text->value);
        text->value = NULL;
    }
    gtk_text_buffer_set_text((GtkTextBuffer*)text->obj, str, -1);
}

void ui_textarea_realize_event(GtkWidget *widget, gpointer data) {
    gtk_widget_grab_focus(widget);
}

void ui_textbuf_insert(
        GtkTextBuffer *textbuffer,
        GtkTextIter *location,
        char *text,
        int len,
        void *data)
{
    //TODO
}

void ui_textbuf_delete(
        GtkTextBuffer *textbuffer,
        GtkTextIter *start,
        GtkTextIter *end,
        void *data)
{
    //TODO
}