netsurf/frontends/gtk/page_info.c

/*
 * Copyright 2015 Vincent Sanders <vince@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
 * Implementation of gtk certificate viewing using gtk core windows.
 */

#include <stdint.h>
#include <stdlib.h>
#include <gtk/gtk.h>

#include "utils/log.h"
#include "netsurf/keypress.h"
#include "netsurf/plotters.h"
#include "netsurf/browser_window.h"
#include "desktop/sslcert_viewer.h"

#include "gtk/plotters.h"
#include "gtk/scaffolding.h"
#include "gtk/resources.h"
#include "gtk/page_info.h"
#include "gtk/corewindow.h"


/**
 * GTK certificate viewing window context
 */
struct nsgtk_pi_window {
	/** GTK core window context */
	struct nsgtk_corewindow core;
	/** GTK builder for window */
	GtkBuilder *builder;
	/** GTK dialog window being shown */
	GtkDialog *dlg;
	/** SSL certificate viewer context data */
	struct sslcert_session_data *ssl_data;
};


/**
 * destroy a previously created certificate view
 */
static nserror nsgtk_pi_destroy(struct nsgtk_pi_window *pi_win)
{
	nserror res;

	res = sslcert_viewer_fini(pi_win->ssl_data);
	if (res == NSERROR_OK) {
		res = nsgtk_corewindow_fini(&pi_win->core);
		gtk_widget_destroy(GTK_WIDGET(pi_win->dlg));
		g_object_unref(G_OBJECT(pi_win->builder));
		free(pi_win);
	}
	return res;
}

static void
nsgtk_pi_accept(GtkButton *w, gpointer data)
{
	struct nsgtk_pi_window *pi_win;
	pi_win = (struct nsgtk_pi_window *)data;

	sslcert_viewer_accept(pi_win->ssl_data);

	nsgtk_pi_destroy(pi_win);
}

static void
nsgtk_pi_reject(GtkWidget *w, gpointer data)
{
	struct nsgtk_pi_window *pi_win;
	pi_win = (struct nsgtk_pi_window *)data;

	sslcert_viewer_reject(pi_win->ssl_data);

	nsgtk_pi_destroy(pi_win);
}

static gboolean
nsgtk_pi_delete_event(GtkWidget *w, GdkEvent  *event, gpointer data)
{
	nsgtk_pi_reject(w, data);
	return FALSE;
}

/**
 * callback for mouse action for certificate verify on core window
 *
 * \param nsgtk_cw The nsgtk core window structure.
 * \param mouse_state netsurf mouse state on event
 * \param x location of event
 * \param y location of event
 * \return NSERROR_OK on success otherwise appropriate error code
 */
static nserror
nsgtk_pi_mouse(struct nsgtk_corewindow *nsgtk_cw,
		    browser_mouse_state mouse_state,
		    int x, int y)
{
	struct nsgtk_pi_window *pi_win;
	/* technically degenerate container of */
	pi_win = (struct nsgtk_pi_window *)nsgtk_cw;

	sslcert_viewer_mouse_action(pi_win->ssl_data, mouse_state, x, y);

	return NSERROR_OK;
}

/**
 * callback for keypress for certificate verify on core window
 *
 * \param nsgtk_cw The nsgtk core window structure.
 * \param nskey The netsurf key code
 * \return NSERROR_OK on success otherwise appropriate error code
 */
static nserror
nsgtk_pi_key(struct nsgtk_corewindow *nsgtk_cw, uint32_t nskey)
{
	struct nsgtk_pi_window *pi_win;

	/* technically degenerate container of */
	pi_win = (struct nsgtk_pi_window *)nsgtk_cw;

	if (sslcert_viewer_keypress(pi_win->ssl_data, nskey)) {
		return NSERROR_OK;
	}
	return NSERROR_NOT_IMPLEMENTED;
}

/**
 * callback on draw event for certificate verify on core window
 *
 * \param nsgtk_cw The nsgtk core window structure.
 * \param r The rectangle of the window that needs updating.
 * \return NSERROR_OK on success otherwise appropriate error code
 */
static nserror
nsgtk_pi_draw(struct nsgtk_corewindow *nsgtk_cw, struct rect *r)
{
	struct redraw_context ctx = {
		.interactive = true,
		.background_images = true,
		.plot = &nsgtk_plotters
	};
	struct nsgtk_pi_window *pi_win;

	/* technically degenerate container of */
	pi_win = (struct nsgtk_pi_window *)nsgtk_cw;

	sslcert_viewer_redraw(pi_win->ssl_data, 0, 0, r, &ctx);

	return NSERROR_OK;
}

static nserror dummy_cb(bool proceed, void *pw)
{
	return NSERROR_OK;
}

/* exported interface documented in gtk/page_info.h */
nserror nsgtk_page_info(struct browser_window *bw)
{
	struct nsgtk_pi_window *ncwin;
	nserror res;

	struct cert_chain *chain;
	struct nsurl *url;

	res = browser_window_get_ssl_chain(bw, &chain);
	if (res != NSERROR_OK) {
		NSLOG(netsurf, WARNING, "Unable to get certificate chain");
		return NSERROR_INVALID;
	}
	url = browser_window_access_url(bw);

	ncwin = malloc(sizeof(struct nsgtk_pi_window));
	if (ncwin == NULL) {
		return NSERROR_NOMEM;
	}

	res = nsgtk_builder_new_from_resname("ssl", &ncwin->builder);
	if (res != NSERROR_OK) {
		NSLOG(netsurf, INFO, "SSL UI builder init failed");
		free(ncwin);
		return res;
	}

	gtk_builder_connect_signals(ncwin->builder, NULL);

	ncwin->dlg = GTK_DIALOG(gtk_builder_get_object(ncwin->builder,
						       "wndSSLProblem"));

	/* set parent for transient dialog */
	gtk_window_set_transient_for(GTK_WINDOW(ncwin->dlg),
		     nsgtk_scaffolding_window(nsgtk_current_scaffolding()));

	ncwin->core.scrolled = GTK_SCROLLED_WINDOW(
		gtk_builder_get_object(ncwin->builder, "SSLScrolled"));

	ncwin->core.drawing_area = GTK_DRAWING_AREA(
		gtk_builder_get_object(ncwin->builder, "SSLDrawingArea"));

	/* make the delete event call our destructor */
	g_signal_connect(G_OBJECT(ncwin->dlg),
			 "delete_event",
			 G_CALLBACK(nsgtk_pi_delete_event),
			 ncwin);

	/* accept button */
	g_signal_connect(G_OBJECT(gtk_builder_get_object(ncwin->builder,
							 "sslaccept")),
			 "clicked",
			 G_CALLBACK(nsgtk_pi_accept),
			 ncwin);

	/* reject button */
	g_signal_connect(G_OBJECT(gtk_builder_get_object(ncwin->builder,
							 "sslreject")),
			 "clicked",
			 G_CALLBACK(nsgtk_pi_reject),
			 ncwin);

	/* initialise GTK core window */
	ncwin->core.draw = nsgtk_pi_draw;
	ncwin->core.key = nsgtk_pi_key;
	ncwin->core.mouse = nsgtk_pi_mouse;

	res = nsgtk_corewindow_init(&ncwin->core);
	if (res != NSERROR_OK) {
		g_object_unref(G_OBJECT(ncwin->dlg));
		free(ncwin);
		return res;
	}

	/* initialise certificate viewing interface */
	res = sslcert_viewer_create_session_data(
		url, dummy_cb, NULL, chain, &ncwin->ssl_data);
	if (res != NSERROR_OK) {
		g_object_unref(G_OBJECT(ncwin->dlg));
		free(ncwin);
		return res;
	}

	res = sslcert_viewer_init(ncwin->core.cb_table,
				  (struct core_window *)ncwin,
				  ncwin->ssl_data);
	if (res != NSERROR_OK) {
		g_object_unref(G_OBJECT(ncwin->dlg));
		free(ncwin);
		return res;
	}

	gtk_widget_show(GTK_WIDGET(ncwin->dlg));

	return NSERROR_OK;
}