git.maemo.org Git - modest/blob - src/widgets/modest-tny-stream-gtkhtml.c

   1 /* Copyright (c) 2006, Nokia Corporation
   2  * All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are
   6  * met:
   7  *
   8  * * Redistributions of source code must retain the above copyright
   9  *   notice, this list of conditions and the following disclaimer.
  10  * * Redistributions in binary form must reproduce the above copyright
  11  *   notice, this list of conditions and the following disclaimer in the
  12  *   documentation and/or other materials provided with the distribution.
  13  * * Neither the name of the Nokia Corporation nor the names of its
  14  *   contributors may be used to endorse or promote products derived from
  15  *   this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
  18  * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  19  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
  20  * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
  21  * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  22  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  23  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  24  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  25  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  26  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  27  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  */
  29
  30
  31 /* modest-tny-stream-gtkhtml.c */
  32
  33 #include "modest-tny-stream-gtkhtml.h"
  34 #include "modest-gtkhtml-mime-part-view.h"
  35 #include <tny-stream.h>
  36 #include <gtkhtml/gtkhtml-stream.h>
  37 #include <gtkhtml/gtkhtml-search.h>
  38
  39 /* 'private'/'protected' functions */
  40 static void  modest_tny_stream_gtkhtml_class_init   (ModestTnyStreamGtkhtmlClass *klass);
  41 static void  modest_tny_stream_gtkhtml_init         (ModestTnyStreamGtkhtml *obj);
  42 static void  modest_tny_stream_gtkhtml_finalize     (GObject *obj);
  43
  44 static void  modest_tny_stream_gtkhml_iface_init (gpointer g_iface, gpointer iface_data);
  45
  46 static void  stop_streams (ModestGtkhtmlMimePartView *view, gpointer userdata);
  47
  48 /* list my signals */
  49 enum {
  50         /* MY_SIGNAL_1, */
  51         /* MY_SIGNAL_2, */
  52         LAST_SIGNAL
  53 };
  54
  55 typedef struct _ModestTnyStreamGtkhtmlPrivate ModestTnyStreamGtkhtmlPrivate;
  56 struct _ModestTnyStreamGtkhtmlPrivate {
  57         GtkHTMLStream *stream;
  58         GtkHTML *html;
  59         guint stop_streams_id;
  60 };
  61 #define MODEST_TNY_STREAM_GTKHTML_GET_PRIVATE(o)      (G_TYPE_INSTANCE_GET_PRIVATE((o), \
  62                                                        MODEST_TYPE_TNY_STREAM_GTKHTML, \
  63                                                        ModestTnyStreamGtkhtmlPrivate))
  64 /* globals */
  65 static GObjectClass *parent_class = NULL;
  66
  67 /* uncomment the following if you have defined any signals */
  68 /* static guint signals[LAST_SIGNAL] = {0}; */
  69
  70 GType
  71 modest_tny_stream_gtkhtml_get_type (void)
  72 {
  73         static GType my_type = 0;
  74         if (!my_type) {
  75                 static const GTypeInfo my_info = {
  76                         sizeof(ModestTnyStreamGtkhtmlClass),
  77                         NULL,           /* base init */
  78                         NULL,           /* base finalize */
  79                         (GClassInitFunc) modest_tny_stream_gtkhtml_class_init,
  80                         NULL,           /* class finalize */
  81                         NULL,           /* class data */
  82                         sizeof(ModestTnyStreamGtkhtml),
  83                         1,              /* n_preallocs */
  84                         (GInstanceInitFunc) modest_tny_stream_gtkhtml_init,
  85                         NULL
  86                 };
  87
  88                 static const GInterfaceInfo iface_info = {
  89                         (GInterfaceInitFunc) modest_tny_stream_gtkhml_iface_init,
  90                         NULL,         /* interface_finalize */
  91                         NULL          /* interface_data */
  92                 };
  93
  94                 my_type = g_type_register_static (G_TYPE_OBJECT,
  95                                                   "ModestTnyStreamGtkhtml",
  96                                                   &my_info, 0);
  97
  98                 g_type_add_interface_static (my_type, TNY_TYPE_STREAM,
  99                                              &iface_info);
 100
 101         }
 102         return my_type;
 103 }
 104
 105 static void
 106 modest_tny_stream_gtkhtml_class_init (ModestTnyStreamGtkhtmlClass *klass)
 107 {
 108         GObjectClass *gobject_class;
 109         gobject_class = (GObjectClass*) klass;
 110
 111         parent_class            = g_type_class_peek_parent (klass);
 112         gobject_class->finalize = modest_tny_stream_gtkhtml_finalize;
 113
 114         g_type_class_add_private (gobject_class, sizeof(ModestTnyStreamGtkhtmlPrivate));
 115 }
 116
 117 static void
 118 modest_tny_stream_gtkhtml_init (ModestTnyStreamGtkhtml *obj)
 119 {
 120         ModestTnyStreamGtkhtmlPrivate *priv;
 121         priv = MODEST_TNY_STREAM_GTKHTML_GET_PRIVATE(obj);
 122
 123         priv->stream  = NULL;
 124         priv->html = NULL;
 125         priv->stop_streams_id = 0;
 126 }
 127
 128 static void
 129 modest_tny_stream_gtkhtml_finalize (GObject *obj)
 130 {
 131         ModestTnyStreamGtkhtmlPrivate *priv;
 132
 133         priv = MODEST_TNY_STREAM_GTKHTML_GET_PRIVATE(obj);
 134         priv->stream = NULL;
 135
 136         if (priv->stop_streams_id > 0) {
 137                 g_signal_handler_disconnect (G_OBJECT (priv->html), priv->stop_streams_id);
 138                 priv->stop_streams_id = 0;
 139         }
 140
 141         if (priv->html) {
 142                 g_object_unref (priv->html);
 143                 priv->html = NULL;
 144         }
 145 }
 146
 147 GObject*
 148 modest_tny_stream_gtkhtml_new (GtkHTMLStream *stream, GtkHTML *html)
 149 {
 150         GObject *obj;
 151         ModestTnyStreamGtkhtmlPrivate *priv;
 152
 153         obj  = G_OBJECT(g_object_new(MODEST_TYPE_TNY_STREAM_GTKHTML, NULL));
 154         priv = MODEST_TNY_STREAM_GTKHTML_GET_PRIVATE(obj);
 155
 156         g_return_val_if_fail (stream, NULL);
 157
 158         priv->stream = stream;
 159         priv->html = g_object_ref (html);
 160
 161         priv->stop_streams_id = g_signal_connect (G_OBJECT (html), "stop-streams",
 162                                                   G_CALLBACK (stop_streams), obj);
 163
 164         return obj;
 165 }
 166
 167
 168 /* the rest are interface functions */
 169
 170
 171 static ssize_t
 172 gtkhtml_read (TnyStream *self, char *buffer, size_t n)
 173 {
 174         return -1; /* we cannot read */
 175 }
 176
 177
 178 static ssize_t
 179 gtkhtml_write (TnyStream *self, const char *buffer, size_t n)
 180 {
 181         ModestTnyStreamGtkhtmlPrivate *priv;
 182
 183         priv = MODEST_TNY_STREAM_GTKHTML_GET_PRIVATE(self);
 184
 185         if (!priv->stream) {
 186                 g_print ("modest: cannot write to closed stream\n");
 187                 return 0;
 188         }
 189
 190         if (n == 0 || !buffer)
 191                 return 0;
 192
 193         if (!priv->html || !GTK_WIDGET_VISIBLE (priv->html))
 194                 return -1;
 195
 196         gtk_html_stream_write (priv->stream, buffer, n);
 197         return n; /* hmmm */
 198 }
 199
 200
 201 static gint
 202 gtkhtml_flush (TnyStream *self)
 203 {
 204         return 0;
 205 }
 206
 207
 208 static gint
 209 gtkhtml_close (TnyStream *self)
 210 {
 211         ModestTnyStreamGtkhtmlPrivate *priv;
 212         g_return_val_if_fail (self, 0);
 213         priv = MODEST_TNY_STREAM_GTKHTML_GET_PRIVATE(self);
 214
 215         if (priv->html && GTK_WIDGET_VISIBLE (priv->html)) {
 216                 gtk_html_stream_close   (priv->stream, GTK_HTML_STREAM_OK);
 217         }
 218         priv->stream = NULL;
 219         if (priv->html && priv->stop_streams_id > 0) {
 220                 g_signal_handler_disconnect (G_OBJECT (priv->html), priv->stop_streams_id);
 221                 priv->stop_streams_id = 0;
 222         }
 223         if (priv->html) {
 224                 g_object_unref (priv->html);
 225                 priv->html = NULL;
 226         }
 227
 228         return 0;
 229 }
 230
 231
 232 static gboolean
 233 gtkhtml_is_eos (TnyStream *self)
 234 {
 235         return TRUE;
 236 }
 237
 238
 239
 240 static gint
 241 gtkhtml_reset (TnyStream *self)
 242 {
 243         return 0;
 244 }
 245
 246
 247 static ssize_t
 248 gtkhtml_write_to_stream (TnyStream *self, TnyStream *output)
 249 {
 250         return 0;
 251 }
 252
 253 static void
 254 stop_streams (ModestGtkhtmlMimePartView *view, gpointer userdata)
 255 {
 256         ModestTnyStreamGtkhtml *self = (ModestTnyStreamGtkhtml *) userdata;
 257         ModestTnyStreamGtkhtmlPrivate *priv;
 258
 259         g_return_if_fail (self);
 260         priv = MODEST_TNY_STREAM_GTKHTML_GET_PRIVATE(self);
 261
 262         if (priv->html && priv->stop_streams_id > 0) {
 263                 g_signal_handler_disconnect (G_OBJECT (priv->html), priv->stop_streams_id);
 264                 priv->stop_streams_id = 0;
 265         }
 266
 267         if (priv->html) {
 268                 g_object_unref (priv->html);
 269                 priv->html = NULL;
 270         }
 271 }
 272
 273 static void
 274 modest_tny_stream_gtkhml_iface_init (gpointer g_iface, gpointer iface_data)
 275 {
 276         TnyStreamIface *klass;
 277
 278         g_return_if_fail (g_iface);
 279
 280         klass = (TnyStreamIface*) g_iface;
 281
 282         klass->read            = gtkhtml_read;
 283         klass->write           = gtkhtml_write;
 284         klass->flush           = gtkhtml_flush;
 285         klass->close           = gtkhtml_close;
 286         klass->is_eos          = gtkhtml_is_eos;
 287         klass->reset           = gtkhtml_reset;
 288         klass->write_to_stream = gtkhtml_write_to_stream;
 289 }