path: root/e-util/e-stock-request.c

/*
 * e-stock-request.c
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) version 3.
 *
 * This program 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with the program; if not, see <http://www.gnu.org/licenses/>
 *
 */

#define LIBSOUP_USE_UNSTABLE_REQUEST_API

#include "e-stock-request.h"

#include <stdlib.h>
#include <gtk/gtk.h>
#include <libsoup/soup.h>

#include <string.h>

#define d(x)

#define E_STOCK_REQUEST_GET_PRIVATE(obj) \
    (G_TYPE_INSTANCE_GET_PRIVATE \
    ((obj), E_TYPE_STOCK_REQUEST, EStockRequestPrivate))

struct _EStockRequestPrivate {
    gchar *content_type;
    gint content_length;
};

G_DEFINE_TYPE (EStockRequest, e_stock_request, SOUP_TYPE_REQUEST)

static void
handle_stock_request (GSimpleAsyncResult *res,
                      GObject *object,
                      GCancellable *cancellable)
{
    SoupURI *uri;
    GHashTable *query;
    GtkIconTheme *icon_theme;
    GtkIconInfo *icon_info;
    const gchar *file;
    gchar *a_size;
    gssize size;
    gchar *buffer;
    gsize buff_len;
    GtkStyleContext *context;
    GtkWidgetPath *path;
    GtkIconSet *set;
    EStockRequest *request;

    request = E_STOCK_REQUEST (object);
    uri = soup_request_get_uri (SOUP_REQUEST (object));

    query = NULL;
    if (uri->query)
        query = soup_form_decode (uri->query);

    if (query) {
        a_size = g_hash_table_lookup (query, "size");
        if (a_size) {
            size = atoi (a_size);
        } else {
            size = GTK_ICON_SIZE_BUTTON;
        }
        g_hash_table_destroy (query);
    } else {
        size = GTK_ICON_SIZE_BUTTON;
    }

    /* Try style context first */
    context = gtk_style_context_new ();
    path = gtk_widget_path_new ();
    gtk_widget_path_append_type (path, GTK_TYPE_WINDOW);
    gtk_widget_path_append_type (path, GTK_TYPE_BUTTON);
    gtk_style_context_set_path (context, path);

    set = gtk_style_context_lookup_icon_set (context, uri->host);
    if (!set) {
        /* Fallback to icon theme */
        icon_theme = gtk_icon_theme_get_default ();
        icon_info = gtk_icon_theme_lookup_icon (
                icon_theme, uri->host, size,
                GTK_ICON_LOOKUP_USE_BUILTIN);
        if (!icon_info) {
            gtk_widget_path_free (path);
            g_object_unref (context);
            return;
        }

        file = gtk_icon_info_get_filename (icon_info);
        buffer = NULL;
        if (file) {
            if (g_file_get_contents (file, &buffer, &buff_len, NULL)) {

                request->priv->content_type =
                    g_content_type_guess (file, NULL, 0, NULL);
                request->priv->content_length = buff_len;
            }

        } else {
            GdkPixbuf *pixbuf;

            pixbuf = gtk_icon_info_get_builtin_pixbuf (icon_info);
            if (pixbuf) {
                gdk_pixbuf_save_to_buffer (
                    pixbuf, &buffer,
                    &buff_len, "png", NULL, NULL);

                request->priv->content_type = g_strdup ("image/png");
                request->priv->content_length = buff_len;

                g_object_unref (pixbuf);
            }
        }

        gtk_icon_info_free (icon_info);

    } else {
        GdkPixbuf *pixbuf;

        pixbuf = gtk_icon_set_render_icon_pixbuf (set, context, size);
                gdk_pixbuf_save_to_buffer (
                    pixbuf, &buffer,
                    &buff_len, "png", NULL, NULL);

        request->priv->content_type = g_strdup ("image/png");
        request->priv->content_length = buff_len;

        g_object_unref (pixbuf);
    }

    if (buffer) {
        GInputStream *stream;
        stream = g_memory_input_stream_new_from_data (
                buffer, buff_len, (GDestroyNotify) g_free);
        g_simple_async_result_set_op_res_gpointer (res, stream, NULL);
    }

    gtk_widget_path_free (path);
    g_object_unref (context);

}
static void
stock_request_finalize (GObject *object)
{
    EStockRequest *request = E_STOCK_REQUEST (object);

    if (request->priv->content_type) {
        g_free (request->priv->content_type);
        request->priv->content_type = NULL;
    }

    G_OBJECT_CLASS (e_stock_request_parent_class)->finalize (object);
}

static gboolean
stock_request_check_uri (SoupRequest *request,
                       SoupURI *uri,
                       GError **error)
{
    return (strcmp (uri->scheme, "gtk-stock") == 0);
}

static void
stock_request_send_async (SoupRequest *request,
                         GCancellable *cancellable,
                         GAsyncReadyCallback callback,
                         gpointer user_data)
{
    GSimpleAsyncResult *simple;

    d (printf ("received request for %s\n", soup_uri_to_string (uri, FALSE)));

    simple = g_simple_async_result_new (
        G_OBJECT (request), callback, user_data,
        stock_request_send_async);

    g_simple_async_result_set_check_cancellable (simple, cancellable);

    g_simple_async_result_run_in_thread (
        simple, handle_stock_request,
        G_PRIORITY_DEFAULT, cancellable);

    g_object_unref (simple);
}

static GInputStream *
stock_request_send_finish (SoupRequest *request,
                           GAsyncResult *result,
                           GError **error)
{
    GSimpleAsyncResult *simple;
    GInputStream *stream;

    simple = G_SIMPLE_ASYNC_RESULT (result);
    stream = g_simple_async_result_get_op_res_gpointer (simple);

    /* Reset the stream before passing it back to webkit */
    if (stream && G_IS_SEEKABLE (stream))
        g_seekable_seek (G_SEEKABLE (stream), 0, G_SEEK_SET, NULL, NULL);

    if (!stream) /* We must always return something */
        stream = g_memory_input_stream_new ();

    return stream;
}

static goffset
stock_request_get_content_length (SoupRequest *request)
{
    EStockRequest *esr = E_STOCK_REQUEST (request);

    d (printf ("Content-Length: %d bytes\n", esr->priv->content_length));
    return esr->priv->content_length;
}

static const gchar *
stock_request_get_content_type (SoupRequest *request)
{
    EStockRequest *esr = E_STOCK_REQUEST (request);

    d (printf ("Content-Type: %s\n", esr->priv->content_type));

    return esr->priv->content_type;
}

static const gchar *data_schemes[] = { "gtk-stock", NULL };

static void
e_stock_request_class_init (EStockRequestClass *class)
{
    GObjectClass *object_class;
    SoupRequestClass *request_class;

    g_type_class_add_private (class, sizeof (EStockRequestPrivate));

    object_class = G_OBJECT_CLASS (class);
    object_class->finalize = stock_request_finalize;

    request_class = SOUP_REQUEST_CLASS (class);
    request_class->schemes = data_schemes;
    request_class->send_async = stock_request_send_async;
    request_class->send_finish = stock_request_send_finish;
    request_class->get_content_type = stock_request_get_content_type;
    request_class->get_content_length = stock_request_get_content_length;
    request_class->check_uri = stock_request_check_uri;
}

static void
e_stock_request_init (EStockRequest *request)
{
    request->priv = E_STOCK_REQUEST_GET_PRIVATE (request);
}