theme_install.c

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/*
 * Copyright 2005 James Bursa <bursa@users.sourceforge.net>
 *
 * 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
 * Theme auto-installing.
 */
 
#include <assert.h>
#include <stdbool.h>
#include <oslib/osfile.h>
#include <oslib/wimp.h>
 
#include "utils/nsoption.h"
#include "utils/log.h"
#include "utils/messages.h"
#include "netsurf/content.h"
#include "content/hlcache.h"
#include "desktop/theme.h"
 
#include "riscos/dialog.h"
#include "riscos/gui.h"
#include "riscos/theme.h"
#include "riscos/wimp.h"
#include "riscos/wimp_event.h"
 
 
static struct hlcache_handle *theme_install_content = NULL;
static struct theme_descriptor theme_install_descriptor;
wimp_w dialog_theme_install;
 
 
static void theme_install_close(wimp_w w);
static nserror theme_install_callback(struct hlcache_handle *handle,
                const hlcache_event *event, void *pw);
 
 
/**
 * Handle a CONTENT_THEME that has started loading.
 */
 
void theme_install_start(struct hlcache_handle *c)
{
        assert(c != NULL);
        assert(content_get_type(c) == CONTENT_THEME);
 
        if (ro_gui_dialog_open_top(dialog_theme_install, NULL, 0, 0)) {
                ro_warn_user("ThemeInstActive", 0);
                return;
        }
 
        /* stop theme sitting in memory cache */
        content_invalidate_reuse_data(c);
 
        hlcache_handle_replace_callback(c, theme_install_callback, NULL);
 
        ro_gui_set_icon_string(dialog_theme_install, ICON_THEME_INSTALL_MESSAGE,
                        messages_get("ThemeInstDown"), true);
        ro_gui_set_icon_shaded_state(dialog_theme_install,
                        ICON_THEME_INSTALL_INSTALL, true);
        ro_gui_wimp_event_register_close_window(dialog_theme_install,
                        theme_install_close);
}
 
 
/**
 * Fill in theme_install_descriptor from received theme data.
 *
 * \param  source_data  received data
 * \param  source_size  size of data
 * \return  true if data is a correct theme, false on error
 *
 * If the data is a correct theme, theme_install_descriptor is filled in.
 */
 
static bool
theme_install_read(const uint8_t *source_data, size_t source_size)
{
        const void *data = source_data;
 
        if (source_size < sizeof(struct theme_file_header))
                return false;
        if (!ro_gui_theme_read_file_header(&theme_install_descriptor,
                        (struct theme_file_header *) data))
                return false;
        if (source_size - sizeof(struct theme_file_header) !=
                        theme_install_descriptor.compressed_size)
                return false;
        return true;
}
 
 
/**
 * Callback for fetchcache() for theme install fetches.
 */
 
nserror theme_install_callback(struct hlcache_handle *handle,
                const hlcache_event *event, void *pw)
{
        switch (event->type) {
 
        case CONTENT_MSG_DONE:
        {
                const uint8_t *source_data;
                size_t source_size;
                int author_indent = 0;
                char buffer[256];
 
                theme_install_content = handle;
 
                source_data = content_get_source_data(handle, &source_size);
 
                if (!theme_install_read(source_data, source_size)) {
                        ro_warn_user("ThemeInvalid", 0);
                        theme_install_close(dialog_theme_install);
                        break;
                }
 
                /* remove '© ' from the start of the data */
                if (theme_install_descriptor.author[0] == '©')
                        author_indent++;
                while (theme_install_descriptor.author[author_indent] == ' ')
                        author_indent++;
                snprintf(buffer, sizeof buffer, messages_get("ThemeInstall"),
                                theme_install_descriptor.name,
                                &theme_install_descriptor.author[author_indent]);
                buffer[sizeof buffer - 1] = '\0';
                ro_gui_set_icon_string(dialog_theme_install,
                                ICON_THEME_INSTALL_MESSAGE,
                                buffer, true);
                ro_gui_set_icon_shaded_state(dialog_theme_install,
                                ICON_THEME_INSTALL_INSTALL, false);
        }
                break;
 
        case CONTENT_MSG_ERROR:
                theme_install_close(dialog_theme_install);
                ro_warn_user(event->data.errordata.errormsg, 0);
                break;
 
        default:
                break;
        }
 
        return NSERROR_OK;
}
 
 
 
 
/**
 * Install the downloaded theme.
 *
 * \param  w    the theme install window handle
 */
 
bool ro_gui_theme_install_apply(wimp_w w)
{
        char theme_save[256];
        char *theme_file;
        struct theme_descriptor *theme_install;
        os_error *error;
        char *fix;
        const uint8_t *source_data;
        size_t source_size;
 
        assert(theme_install_content);
 
        /* convert spaces to hard spaces */
        theme_file = strdup(theme_install_descriptor.name);
        if (!theme_file) {
                NSLOG(netsurf, INFO, "malloc failed");
                ro_warn_user("NoMemory", 0);
                return false;
        }
        for (fix = theme_file; *fix != '\0'; fix++)
                if (*fix == ' ')
                        *fix = 160;     /* hard space */
 
        /* simply overwrite previous theme versions */
        snprintf(theme_save, sizeof theme_save, "%s.%s",
                 nsoption_charp(theme_save), theme_file);
 
        theme_save[sizeof theme_save - 1] = '\0';
 
        source_data = content_get_source_data(theme_install_content, 
                        &source_size);
 
        error = xosfile_save_stamped(theme_save, 0xffd,
                        (byte *) source_data,
                        (byte *) source_data + source_size);
        if (error) {
                NSLOG(netsurf, INFO, "xosfile_save_stamped: 0x%x: %s",
                      error->errnum, error->errmess);
                ro_warn_user("ThemeInstallErr", 0);
                free(theme_file);
                return false;
        }
 
        /* apply the new theme */
        ro_gui_theme_get_available();
        theme_install = ro_gui_theme_find(theme_file);
        if (!theme_install || !ro_gui_theme_apply(theme_install)) {
                ro_warn_user("ThemeApplyErr", 0);
        } else {
            nsoption_set_charp(theme, strdup(theme_install->leafname));
        }
        free(theme_file);
        ro_gui_save_options();
        return true;
}
 
 
/**
 * Close the theme installer and free resources.
 */
 
void theme_install_close(wimp_w w)
{
        if (theme_install_content)
                hlcache_handle_release(theme_install_content);
 
        theme_install_content = NULL;
}