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/*
 * Copyright 2011 Sven Weidauer <sven.weidauer@gmail.com>
 *
 * 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/>.
 */

#import <Cocoa/Cocoa.h>

#import "cocoa/BrowserViewController.h"
#import "cocoa/selection.h"

#import "netsurf/clipboard.h"

static NSMutableString *cocoa_clipboard_string;

/**
 * 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)
{
    NSPasteboard *pb = [NSPasteboard generalPasteboard];
    NSString *string = [pb stringForType:NSStringPboardType];

    *buffer = NULL;
    *length = 0;

    if (string) {
        const char *text = [string UTF8String];
        *length = strlen(text);

        *buffer = malloc(*length);

        if (*buffer != NULL) {
            memcpy(*buffer, text, *length);
        } else {
            *length = 0;
        }
    }
}

/**
 * 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)
{
    /* Empty clipboard string */
    if (nil == cocoa_clipboard_string) {
        cocoa_clipboard_string = [[NSMutableString alloc] init];
    } else {
        [cocoa_clipboard_string setString:@""];
    }

    [cocoa_clipboard_string appendString:[[NSString alloc]
                                             initWithBytes:buffer
                                                    length:length
                                                  encoding:NSUTF8StringEncoding]];

    /* Stick it on the pasteboard */
    NSPasteboard *pb = [NSPasteboard generalPasteboard];
    [pb declareTypes:[NSArray arrayWithObject:NSStringPboardType] owner:nil];
    bool result = [pb setString:cocoa_clipboard_string forType:NSStringPboardType];

    if (result) {
        /* Empty clipboard string */
        if (nil == cocoa_clipboard_string) {
            cocoa_clipboard_string = [[NSMutableString alloc] init];
        } else {
            [cocoa_clipboard_string setString:@""];
        }
    }
}

static struct gui_clipboard_table clipboard_table = {
    .get = gui_get_clipboard,
    .set = gui_set_clipboard,
};

struct gui_clipboard_table *cocoa_clipboard_table = &clipboard_table;