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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 "desktop/selection.h"
#include "framebuffer/gui.h"
#include "render/box.h"
#include "utils/log.h"
static struct gui_clipboard {
char *buffer;
size_t buffer_len;
size_t length;
} gui_clipboard;
/**
* Selection traversal routine for appending text to the current contents
* of the clipboard.
*
* \param text pointer to text being added, or NULL for newline
* \param length length of text to be appended (bytes)
* \param box pointer to text box, or NULL if from textplain
* \param handle unused handle, we don't need one
* \param whitespace_text whitespace to place before text for formatting
* may be NULL
* \param whitespace_length length of whitespace_text
* \return true iff successful and traversal should continue
*/
static bool copy_handler(const char *text, size_t length, struct box *box,
void *handle, const char *whitespace_text,
size_t whitespace_length)
{
bool add_space = box != NULL ? box->space != 0 : false;
/* add any whitespace which precedes the text from this box */
if (whitespace_text != NULL && whitespace_length > 0) {
if (!gui_add_to_clipboard(whitespace_text,
whitespace_length, false)) {
return false;
}
}
/* add the text from this box */
if (!gui_add_to_clipboard(text, length, add_space))
return false;
return true;
}
/**
* Empty the clipboard, called prior to gui_add_to_clipboard and
* gui_commit_clipboard
*
* \return true iff successful
*/
bool gui_empty_clipboard(void)
{
const size_t init_size = 1024;
if (gui_clipboard.buffer_len == 0) {
gui_clipboard.buffer = malloc(init_size);
if (gui_clipboard.buffer == NULL)
return false;
gui_clipboard.buffer_len = init_size;
}
gui_clipboard.length = 0;
return true;
}
/**
* Add some text to the clipboard, optionally appending a trailing space.
*
* \param text text to be added
* \param length length of text in bytes
* \param space indicates whether a trailing space should be appended
* \return true iff successful
*/
bool gui_add_to_clipboard(const char *text, size_t length, bool space)
{
size_t new_length = gui_clipboard.length + length + (space ? 1 : 0) + 1;
if (new_length > gui_clipboard.buffer_len) {
size_t new_alloc = new_length + (new_length / 4);
char *new_buff;
new_buff = realloc(gui_clipboard.buffer, new_alloc);
if (new_buff == NULL)
return false;
gui_clipboard.buffer = new_buff;
gui_clipboard.buffer_len = new_alloc;
}
memcpy(gui_clipboard.buffer + gui_clipboard.length, text, length);
gui_clipboard.length += length;
if (space)
gui_clipboard.buffer[gui_clipboard.length++] = ' ';
gui_clipboard.buffer[gui_clipboard.length] = '\0';
return true;
}
/**
* Commit the changes made by gui_empty_clipboard and gui_add_to_clipboard.
*
* \return true iff successful
*/
bool gui_commit_clipboard(void)
{
/* TODO: Stick the clipboard in some fbtk buffer? */
return true;
}
/**
* Copy the selected contents to the clipboard
*
* \param s selection
* \return true iff successful, ie. cut operation can proceed without losing data
*/
bool gui_copy_to_clipboard(struct selection *s)
{
if (!gui_empty_clipboard())
return false;
selection_traverse(s, copy_handler, NULL);
return gui_commit_clipboard();
}
/**
* Request to paste the clipboard contents into a textarea/input field
* at a given position.
*
* \param g gui window
* \param x x ordinate at which to paste text
* \param y y ordinate at which to paste text
*/
void gui_paste_from_clipboard(struct gui_window *g, int x, int y)
{
if (gui_clipboard.length > 0) {
LOG(("Pasting %i chars: \"%s\"\n", gui_clipboard.length,
gui_clipboard.buffer));
browser_window_paste_text(g->bw, gui_clipboard.buffer,
gui_clipboard.length, true);
}
}
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