clipboard.c

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/*
 * Copyright 2012 Michael Drake <tlsa@netsurf-browser.org>
 *
 * This file is part of NetSurf, http://www.netsurf-browser.org/
 *
 * NetSurf is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 *
 * NetSurf 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
/** \file
  * nsfb internal clipboard handling
  */
 
#include <assert.h>
#include <stdint.h>
#include <string.h>
#include <stdlib.h>
 
#include "utils/log.h"
#include "netsurf/browser_window.h"
#include "netsurf/clipboard.h"
 
#include "framebuffer/gui.h"
#include "framebuffer/clipboard.h"
 
 
static struct gui_clipboard {
        char *buffer;
        size_t buffer_len;
        size_t length;
} gui_clipboard;
 
 
/**
 * Core asks front end for clipboard contents.
 *
 * \param  buffer  UTF-8 text, allocated by front end, ownership yeilded to core
 * \param  length  Byte length of UTF-8 text in buffer
 */
static void gui_get_clipboard(char **buffer, size_t *length)
{
        *buffer = NULL;
        *length = 0;
 
        if (gui_clipboard.length > 0) {
                assert(gui_clipboard.buffer != NULL);
                NSLOG(netsurf, INFO, "Pasting %zd bytes: \"%s\"\n",
                      gui_clipboard.length, gui_clipboard.buffer);
 
                *buffer = malloc(gui_clipboard.length);
 
                if (*buffer != NULL) {
                        memcpy(*buffer, gui_clipboard.buffer,
                                        gui_clipboard.length);
                        *length = gui_clipboard.length;
                }
        }
}
 
 
/**
 * Core tells front end to put given text in clipboard
 *
 * \param  buffer    UTF-8 text, owned by core
 * \param  length    Byte length of UTF-8 text in buffer
 * \param  styles    Array of styles given to text runs, owned by core, or NULL
 * \param  n_styles  Number of text run styles in array
 */
static void gui_set_clipboard(const char *buffer, size_t length,
                nsclipboard_styles styles[], int n_styles)
{
        if (gui_clipboard.buffer_len < length + 1) {
                /* Make buffer big enough */
                char *new_buff;
 
                new_buff = realloc(gui_clipboard.buffer, length + 1);
                if (new_buff == NULL)
                        return;
 
                gui_clipboard.buffer = new_buff;
                gui_clipboard.buffer_len = length + 1;
        }
 
        gui_clipboard.length = 0;
 
        memcpy(gui_clipboard.buffer, buffer, length);
        gui_clipboard.length = length;
        gui_clipboard.buffer[gui_clipboard.length] = '\0';
}
 
static struct gui_clipboard_table clipboard_table = {
        .get = gui_get_clipboard,
        .set = gui_set_clipboard,
};
 
struct gui_clipboard_table *framebuffer_clipboard_table = &clipboard_table;