git.maemo.org Git - modest/blob - src/widgets/modest-gtkhtml-mime-part-view.c

   1 /* Copyright (c) 2006, 2007, 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 #include <config.h>
  31 #include <widgets/modest-gtkhtml-mime-part-view.h>
  32 #include <string.h>
  33 #include <gtkhtml/gtkhtml-stream.h>
  34 #include <gtkhtml/gtkhtml-search.h>
  35 #include <tny-stream.h>
  36 #include <tny-mime-part-view.h>
  37 #include "modest-tny-mime-part.h"
  38 #include <modest-stream-text-to-html.h>
  39 #include <modest-text-utils.h>
  40 #include <modest-conf.h>
  41 #include <modest-runtime.h>
  42 #include <widgets/modest-mime-part-view.h>
  43 #include <widgets/modest-zoomable.h>
  44 #include <widgets/modest-tny-stream-gtkhtml.h>
  45 #include <libgnomevfs/gnome-vfs.h>
  46 #include <gdk/gdkkeysyms.h>
  47 #include <modest-ui-constants.h>
  48
  49 /* gobject structure methods */
  50 static void    modest_gtkhtml_mime_part_view_class_init (ModestGtkhtmlMimePartViewClass *klass);
  51 static void    tny_mime_part_view_init                  (gpointer g, gpointer iface_data);
  52 static void    modest_mime_part_view_init               (gpointer g, gpointer iface_data);
  53 static void    modest_zoomable_init                     (gpointer g, gpointer iface_data);
  54 static void    modest_isearch_view_init                 (gpointer g, gpointer iface_data);
  55 static void    modest_gtkhtml_mime_part_view_init       (ModestGtkhtmlMimePartView *self);
  56 static void    modest_gtkhtml_mime_part_view_finalize   (GObject *self);
  57 static void    modest_gtkhtml_mime_part_view_dispose    (GObject *self);
  58
  59 /* GtkHTML signal handlers */
  60 static gboolean  on_link_clicked  (GtkWidget *widget, const gchar *uri, ModestGtkhtmlMimePartView *self);
  61 static gboolean  on_url           (GtkWidget *widget, const gchar *uri, ModestGtkhtmlMimePartView *self);
  62 static gboolean  on_url_requested (GtkWidget *widget, const gchar *uri, GtkHTMLStream *stream,
  63                                    ModestGtkhtmlMimePartView *self);
  64 static void      on_notify_style  (GObject *obj, GParamSpec *spec, gpointer userdata);
  65 static gboolean  update_style     (ModestGtkhtmlMimePartView *self);
  66 /* TnyMimePartView implementation */
  67 static void modest_gtkhtml_mime_part_view_clear (TnyMimePartView *self);
  68 static void modest_gtkhtml_mime_part_view_clear_default (TnyMimePartView *self);
  69 static void modest_gtkhtml_mime_part_view_set_part (TnyMimePartView *self, TnyMimePart *part);
  70 static void modest_gtkhtml_mime_part_view_set_part_default (TnyMimePartView *self, TnyMimePart *part);
  71 static TnyMimePart* modest_gtkhtml_mime_part_view_get_part (TnyMimePartView *self);
  72 static TnyMimePart* modest_gtkhtml_mime_part_view_get_part_default (TnyMimePartView *self);
  73 /* ModestMimePartView implementation */
  74 static gboolean modest_gtkhtml_mime_part_view_is_empty (ModestMimePartView *self);
  75 static gboolean modest_gtkhtml_mime_part_view_is_empty_default (ModestMimePartView *self);
  76 static gboolean modest_gtkhtml_mime_part_view_get_view_images (ModestMimePartView *self);
  77 static gboolean modest_gtkhtml_mime_part_view_get_view_images_default (ModestMimePartView *self);
  78 static void     modest_gtkhtml_mime_part_view_set_view_images (ModestMimePartView *self, gboolean view_images);
  79 static void     modest_gtkhtml_mime_part_view_set_view_images_default (ModestMimePartView *self, gboolean view_images);
  80 static gboolean modest_gtkhtml_mime_part_view_has_external_images (ModestMimePartView *self);
  81 static gboolean modest_gtkhtml_mime_part_view_has_external_images_default (ModestMimePartView *self);
  82 /* ModestZoomable implementation */
  83 static gdouble modest_gtkhtml_mime_part_view_get_zoom (ModestZoomable *self);
  84 static void modest_gtkhtml_mime_part_view_set_zoom (ModestZoomable *self, gdouble value);
  85 static gboolean modest_gtkhtml_mime_part_view_zoom_minus (ModestZoomable *self);
  86 static gboolean modest_gtkhtml_mime_part_view_zoom_plus (ModestZoomable *self);
  87 static gdouble modest_gtkhtml_mime_part_view_get_zoom_default (ModestZoomable *self);
  88 static void modest_gtkhtml_mime_part_view_set_zoom_default (ModestZoomable *self, gdouble value);
  89 static gboolean modest_gtkhtml_mime_part_view_zoom_minus_default (ModestZoomable *self);
  90 static gboolean modest_gtkhtml_mime_part_view_zoom_plus_default (ModestZoomable *self);
  91 /* ModestISearchView implementation */
  92 static gboolean modest_gtkhtml_mime_part_view_search                    (ModestISearchView *self, const gchar *string);
  93 static gboolean modest_gtkhtml_mime_part_view_search_next               (ModestISearchView *self);
  94 static gboolean modest_gtkhtml_mime_part_view_get_selection_area        (ModestISearchView *self, gint *x, gint *y,
  95                                                                          gint *width, gint *height);
  96 static gboolean modest_gtkhtml_mime_part_view_search_default            (ModestISearchView *self, const gchar *string);
  97 static gboolean modest_gtkhtml_mime_part_view_search_next_default       (ModestISearchView *self);
  98 static gboolean modest_gtkhtml_mime_part_view_get_selection_area_default (ModestISearchView *self, gint *x, gint *y,
  99                                                                           gint *width, gint *height);
 100
 101
 102 /* internal api */
 103 static TnyMimePart  *get_part   (ModestGtkhtmlMimePartView *self);
 104 static void          set_html_part   (ModestGtkhtmlMimePartView *self, TnyMimePart *part, const gchar *encoding);
 105 static void          set_text_part   (ModestGtkhtmlMimePartView *self, TnyMimePart *part);
 106 static void          set_empty_part  (ModestGtkhtmlMimePartView *self);
 107 static void          set_part   (ModestGtkhtmlMimePartView *self, TnyMimePart *part);
 108 static gboolean      is_empty   (ModestGtkhtmlMimePartView *self);
 109 static gboolean      get_view_images   (ModestGtkhtmlMimePartView *self);
 110 static void          set_view_images   (ModestGtkhtmlMimePartView *self, gboolean view_images);
 111 static gboolean      has_external_images   (ModestGtkhtmlMimePartView *self);
 112 static void          set_zoom   (ModestGtkhtmlMimePartView *self, gdouble zoom);
 113 static gdouble       get_zoom   (ModestGtkhtmlMimePartView *self);
 114 static gboolean      has_contents_receiver (gpointer engine, const gchar *data,
 115                                             size_t len, gboolean *has_contents);
 116 static gboolean      search             (ModestGtkhtmlMimePartView *self, const gchar *string);
 117 static gboolean      search_next        (ModestGtkhtmlMimePartView *self);
 118 static gboolean      get_selection_area (ModestGtkhtmlMimePartView *self, gint *x, gint *y,
 119                                          gint *width, gint *height);
 120
 121 typedef struct _ModestGtkhtmlMimePartViewPrivate ModestGtkhtmlMimePartViewPrivate;
 122 struct _ModestGtkhtmlMimePartViewPrivate {
 123         TnyMimePart *part;
 124         gdouble current_zoom;
 125         gboolean view_images;
 126         gboolean has_external_images;
 127         GSList *sighandlers;
 128 };
 129
 130 #define MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE(o)      (G_TYPE_INSTANCE_GET_PRIVATE((o), \
 131                                                                                        MODEST_TYPE_GTKHTML_MIME_PART_VIEW, \
 132                                                                                        ModestGtkhtmlMimePartViewPrivate))
 133
 134 enum {
 135         STOP_STREAMS_SIGNAL,
 136         LAST_SIGNAL
 137 };
 138
 139 static GtkHTMLClass *parent_class = NULL;
 140
 141 static guint signals[LAST_SIGNAL] = {0};
 142
 143 GtkWidget *
 144 modest_gtkhtml_mime_part_view_new ()
 145 {
 146         return g_object_new (MODEST_TYPE_GTKHTML_MIME_PART_VIEW, NULL);
 147 }
 148
 149 /* GOBJECT IMPLEMENTATION */
 150 GType
 151 modest_gtkhtml_mime_part_view_get_type (void)
 152 {
 153         static GType my_type = 0;
 154         if (!my_type) {
 155                 static const GTypeInfo my_info = {
 156                         sizeof(ModestGtkhtmlMimePartViewClass),
 157                         NULL,           /* base init */
 158                         NULL,           /* base finalize */
 159                         (GClassInitFunc) modest_gtkhtml_mime_part_view_class_init,
 160                         NULL,           /* class finalize */
 161                         NULL,           /* class data */
 162                         sizeof(ModestGtkhtmlMimePartView),
 163                         1,              /* n_preallocs */
 164                         (GInstanceInitFunc) modest_gtkhtml_mime_part_view_init,
 165                         NULL
 166                 };
 167
 168                 static const GInterfaceInfo tny_mime_part_view_info =
 169                 {
 170                   (GInterfaceInitFunc) tny_mime_part_view_init, /* interface_init */
 171                   NULL,         /* interface_finalize */
 172                   NULL          /* interface_data */
 173                 };
 174
 175                 static const GInterfaceInfo modest_mime_part_view_info =
 176                 {
 177                   (GInterfaceInitFunc) modest_mime_part_view_init, /* interface_init */
 178                   NULL,         /* interface_finalize */
 179                   NULL          /* interface_data */
 180                 };
 181
 182                 static const GInterfaceInfo modest_zoomable_info =
 183                 {
 184                   (GInterfaceInitFunc) modest_zoomable_init, /* interface_init */
 185                   NULL,         /* interface_finalize */
 186                   NULL          /* interface_data */
 187                 };
 188
 189                 static const GInterfaceInfo modest_isearch_view_info =
 190                 {
 191                   (GInterfaceInitFunc) modest_isearch_view_init, /* interface_init */
 192                   NULL,         /* interface_finalize */
 193                   NULL          /* interface_data */
 194                 };
 195
 196                 my_type = g_type_register_static (GTK_TYPE_HTML,
 197                                                   "ModestGtkhtmlMimePartView",
 198                                                   &my_info, 0);
 199
 200                 g_type_add_interface_static (my_type, TNY_TYPE_MIME_PART_VIEW,
 201                         &tny_mime_part_view_info);
 202
 203                 g_type_add_interface_static (my_type, MODEST_TYPE_MIME_PART_VIEW,
 204                         &modest_mime_part_view_info);
 205
 206                 g_type_add_interface_static (my_type, MODEST_TYPE_ZOOMABLE,
 207                         &modest_zoomable_info);
 208                 g_type_add_interface_static (my_type, MODEST_TYPE_ISEARCH_VIEW,
 209                         &modest_isearch_view_info);
 210         }
 211         return my_type;
 212 }
 213
 214 static void
 215 modest_gtkhtml_mime_part_view_class_init (ModestGtkhtmlMimePartViewClass *klass)
 216 {
 217         GObjectClass *gobject_class;
 218         GtkBindingSet *binding_set;
 219
 220         gobject_class = (GObjectClass*) klass;
 221
 222         parent_class            = g_type_class_peek_parent (klass);
 223         gobject_class->dispose = modest_gtkhtml_mime_part_view_dispose;
 224         gobject_class->finalize = modest_gtkhtml_mime_part_view_finalize;
 225
 226         klass->get_part_func = modest_gtkhtml_mime_part_view_get_part_default;
 227         klass->set_part_func = modest_gtkhtml_mime_part_view_set_part_default;
 228         klass->clear_func = modest_gtkhtml_mime_part_view_clear_default;
 229         klass->is_empty_func = modest_gtkhtml_mime_part_view_is_empty_default;
 230         klass->get_view_images_func = modest_gtkhtml_mime_part_view_get_view_images_default;
 231         klass->set_view_images_func = modest_gtkhtml_mime_part_view_set_view_images_default;
 232         klass->has_external_images_func = modest_gtkhtml_mime_part_view_has_external_images_default;
 233         klass->get_zoom_func = modest_gtkhtml_mime_part_view_get_zoom_default;
 234         klass->set_zoom_func = modest_gtkhtml_mime_part_view_set_zoom_default;
 235         klass->zoom_minus_func = modest_gtkhtml_mime_part_view_zoom_minus_default;
 236         klass->zoom_plus_func = modest_gtkhtml_mime_part_view_zoom_plus_default;
 237         klass->search_func = modest_gtkhtml_mime_part_view_search_default;
 238         klass->search_next_func = modest_gtkhtml_mime_part_view_search_next_default;
 239         klass->get_selection_area_func = modest_gtkhtml_mime_part_view_get_selection_area_default;
 240
 241         binding_set = gtk_binding_set_by_class (klass);
 242         gtk_binding_entry_skip (binding_set, GDK_Down, 0);
 243         gtk_binding_entry_skip (binding_set, GDK_Up, 0);
 244         gtk_binding_entry_skip (binding_set, GDK_KP_Up, 0);
 245         gtk_binding_entry_skip (binding_set, GDK_KP_Down, 0);
 246         gtk_binding_entry_skip (binding_set, GDK_Page_Down, 0);
 247         gtk_binding_entry_skip (binding_set, GDK_Page_Up, 0);
 248         gtk_binding_entry_skip (binding_set, GDK_KP_Page_Up, 0);
 249         gtk_binding_entry_skip (binding_set, GDK_KP_Page_Down, 0);
 250         gtk_binding_entry_skip (binding_set, GDK_Home, 0);
 251         gtk_binding_entry_skip (binding_set, GDK_End, 0);
 252         gtk_binding_entry_skip (binding_set, GDK_KP_Home, 0);
 253         gtk_binding_entry_skip (binding_set, GDK_KP_End, 0);
 254
 255         g_type_class_add_private (gobject_class, sizeof(ModestGtkhtmlMimePartViewPrivate));
 256
 257         signals[STOP_STREAMS_SIGNAL] =
 258                 g_signal_new ("stop-streams",
 259                               G_TYPE_FROM_CLASS (gobject_class),
 260                               G_SIGNAL_RUN_FIRST,
 261                               G_STRUCT_OFFSET (ModestGtkhtmlMimePartViewClass,stop_streams),
 262                               NULL, NULL,
 263                               g_cclosure_marshal_VOID__VOID,
 264                               G_TYPE_NONE, 0);
 265
 266 }
 267
 268 static void
 269 modest_gtkhtml_mime_part_view_init (ModestGtkhtmlMimePartView *self)
 270 {
 271         ModestGtkhtmlMimePartViewPrivate *priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 272         GdkColor base;
 273         GdkColor text;
 274
 275         gtk_html_set_editable        (GTK_HTML(self), FALSE);
 276         gtk_html_allow_selection     (GTK_HTML(self), TRUE);
 277         gtk_html_set_caret_mode      (GTK_HTML(self), FALSE);
 278         gtk_html_set_blocking        (GTK_HTML(self), TRUE);
 279         gtk_html_set_images_blocking (GTK_HTML(self), TRUE);
 280         gtk_container_set_border_width (GTK_CONTAINER (self), MODEST_MARGIN_DEFAULT);
 281
 282 #ifdef MODEST_TOOLKIT_HILDON2
 283 #ifdef HAVE_GTK_HTML_SET_MAX_IMAGE_SIZE
 284         /* We set a maximum width of a bit less than the width of the screen, and a
 285            maximum height of 2 times the full size of the window. Should be enough */
 286         gtk_html_set_max_image_size (GTK_HTML (self), 720, 880);
 287 #endif
 288 #ifdef HAVE_GTK_HTML_SET_ALLOW_DND
 289         gtk_html_set_allow_dnd       (GTK_HTML(self), FALSE);
 290 #endif
 291 #endif
 292
 293         gdk_color_parse ("#fff", &base);
 294         gdk_color_parse ("#000", &text);
 295         gtk_widget_modify_base (GTK_WIDGET (self), GTK_STATE_NORMAL, &base);
 296         gtk_widget_modify_text (GTK_WIDGET (self), GTK_STATE_NORMAL, &text);
 297
 298         priv->sighandlers = modest_signal_mgr_connect (priv->sighandlers,
 299                                                        G_OBJECT(self), "link_clicked",
 300                                                        G_CALLBACK(on_link_clicked), self);
 301         priv->sighandlers = modest_signal_mgr_connect (priv->sighandlers,
 302                                                        G_OBJECT(self), "url_requested",
 303                                                        G_CALLBACK(on_url_requested), self);
 304         priv->sighandlers = modest_signal_mgr_connect (priv->sighandlers,
 305                                                        G_OBJECT(self), "on_url",
 306                                                        G_CALLBACK(on_url), self);
 307         priv->sighandlers = modest_signal_mgr_connect (priv->sighandlers,
 308                                                        G_OBJECT(self), "notify::style",
 309                                                        G_CALLBACK (on_notify_style), (gpointer) self);
 310
 311         priv->part = NULL;
 312         priv->current_zoom = 1.0;
 313         priv->view_images = FALSE;
 314         priv->has_external_images = FALSE;
 315 }
 316
 317 static void
 318 modest_gtkhtml_mime_part_view_finalize (GObject *obj)
 319 {
 320         ModestGtkhtmlMimePartViewPrivate *priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (obj);
 321
 322         modest_signal_mgr_disconnect_all_and_destroy (priv->sighandlers);
 323         priv->sighandlers = NULL;
 324
 325         G_OBJECT_CLASS (parent_class)->finalize (obj);
 326 }
 327
 328 static void
 329 modest_gtkhtml_mime_part_view_dispose (GObject *obj)
 330 {
 331         ModestGtkhtmlMimePartViewPrivate *priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (obj);
 332
 333         g_signal_emit (G_OBJECT (obj), signals[STOP_STREAMS_SIGNAL], 0);
 334
 335         if (priv->part) {
 336                 g_object_unref (priv->part);
 337                 priv->part = NULL;
 338         }
 339
 340         G_OBJECT_CLASS (parent_class)->dispose (obj);
 341 }
 342
 343 /* GTKHTML SIGNALS HANDLERS */
 344
 345 static void
 346 on_notify_style (GObject *obj, GParamSpec *spec, gpointer userdata)
 347 {
 348         if (strcmp ("style", spec->name) == 0) {
 349                 g_idle_add_full (G_PRIORITY_DEFAULT, (GSourceFunc) update_style,
 350                                  g_object_ref (obj), g_object_unref);
 351                 gtk_widget_queue_draw (GTK_WIDGET (obj));
 352         }
 353 }
 354
 355 gboolean
 356 same_color (GdkColor *a, GdkColor *b)
 357 {
 358         return ((a->red == b->red) &&
 359                 (a->green == b->green) &&
 360                 (a->blue == b->blue));
 361 }
 362
 363 static gboolean
 364 update_style (ModestGtkhtmlMimePartView *self)
 365 {
 366         GdkColor base;
 367         GdkColor text;
 368         GtkRcStyle *rc_style;
 369
 370         gdk_threads_enter ();
 371
 372         if (GTK_WIDGET_VISIBLE (self)) {
 373                 rc_style = gtk_widget_get_modifier_style (GTK_WIDGET (self));
 374
 375                 gdk_color_parse ("#fff", &base);
 376                 gdk_color_parse ("#000", &text);
 377
 378                 if (!same_color (&(rc_style->base[GTK_STATE_NORMAL]), &base) &&
 379                     !same_color (&(rc_style->text[GTK_STATE_NORMAL]), &text)) {
 380
 381                         rc_style->base[GTK_STATE_NORMAL] = base;
 382                         rc_style->text[GTK_STATE_NORMAL] = text;
 383                         gtk_widget_modify_style (GTK_WIDGET (self), rc_style);
 384                 }
 385         }
 386
 387         gdk_threads_leave ();
 388
 389         return FALSE;
 390 }
 391
 392
 393
 394 static gboolean
 395 on_link_clicked (GtkWidget *widget, const gchar *uri, ModestGtkhtmlMimePartView *self)
 396 {
 397         gboolean result;
 398         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 399
 400         g_signal_emit_by_name (G_OBJECT (self), "activate-link", uri, &result);
 401         return result;
 402 }
 403
 404 static gboolean
 405 on_url (GtkWidget *widget, const gchar *uri, ModestGtkhtmlMimePartView *self)
 406 {
 407         gboolean result;
 408         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 409
 410         g_signal_emit_by_name (G_OBJECT (self), "link-hover", uri, &result);
 411         return result;
 412 }
 413
 414 typedef struct {
 415         gpointer buffer;
 416         GtkHTML *html;
 417         GtkHTMLStream *stream;
 418 } ImageFetcherInfo;
 419
 420 static gboolean
 421 on_url_requested (GtkWidget *widget, const gchar *uri, GtkHTMLStream *stream,
 422                   ModestGtkhtmlMimePartView *self)
 423 {
 424         gboolean result;
 425         TnyStream *tny_stream;
 426         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 427
 428         if (g_str_has_prefix (uri, "http:")) {
 429                 ModestGtkhtmlMimePartViewPrivate *priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 430
 431                 if (!priv->view_images)
 432                         priv->has_external_images = TRUE;
 433         }
 434
 435         tny_stream = TNY_STREAM (modest_tny_stream_gtkhtml_new (stream, GTK_HTML (widget)));
 436         g_signal_emit_by_name (MODEST_MIME_PART_VIEW (self), "fetch-url", uri, tny_stream, &result);
 437         g_object_unref (tny_stream);
 438         return result;
 439 }
 440
 441 /* INTERNAL API */
 442 static void
 443 decode_to_stream_cb (TnyMimePart *self,
 444                      gboolean cancelled,
 445                      TnyStream *stream,
 446                      GError *err,
 447                      gpointer user_data)
 448 {
 449         gboolean is_text = GPOINTER_TO_INT (user_data);
 450
 451         if (is_text) {
 452                 if (tny_stream_write (stream, "\n", 1) == -1) {
 453                         g_warning ("failed to write CR in %s", __FUNCTION__);
 454                 }
 455                 tny_stream_reset (stream);
 456         }
 457         tny_stream_close (stream);
 458 }
 459
 460 static void
 461 set_html_part (ModestGtkhtmlMimePartView *self, TnyMimePart *part, const gchar *encoding)
 462 {
 463         GtkHTMLStream *gtkhtml_stream;
 464         TnyStream *tny_stream;
 465
 466         g_return_if_fail (self);
 467         g_return_if_fail (part);
 468
 469         g_signal_emit (G_OBJECT (self), signals[STOP_STREAMS_SIGNAL], 0);
 470
 471         gtkhtml_stream = gtk_html_begin_full(GTK_HTML(self), NULL, (char *) encoding, 0);
 472
 473         tny_stream     = TNY_STREAM(modest_tny_stream_gtkhtml_new (gtkhtml_stream, GTK_HTML (self)));
 474         tny_stream_reset (tny_stream);
 475
 476         tny_mime_part_decode_to_stream_async (TNY_MIME_PART (part),
 477                                               tny_stream, decode_to_stream_cb,
 478                                               NULL, GINT_TO_POINTER (FALSE));
 479         g_object_unref (tny_stream);
 480 }
 481
 482 static void
 483 set_text_part (ModestGtkhtmlMimePartView *self, TnyMimePart *part)
 484 {
 485         TnyStream* text_to_html_stream, *tny_stream;
 486         GtkHTMLStream *gtkhtml_stream;
 487
 488         g_return_if_fail (self);
 489         g_return_if_fail (part);
 490
 491         g_signal_emit (G_OBJECT (self), signals[STOP_STREAMS_SIGNAL], 0);
 492
 493         gtkhtml_stream = gtk_html_begin(GTK_HTML(self));
 494         tny_stream =  TNY_STREAM(modest_tny_stream_gtkhtml_new (gtkhtml_stream, GTK_HTML (self)));
 495         text_to_html_stream = TNY_STREAM (modest_stream_text_to_html_new (tny_stream));
 496         modest_stream_text_to_html_set_linkify_limit (MODEST_STREAM_TEXT_TO_HTML (text_to_html_stream),
 497                                                       64*1024);
 498         modest_stream_text_to_html_set_full_limit (MODEST_STREAM_TEXT_TO_HTML (text_to_html_stream),
 499                                                    640*1024);
 500
 501         tny_mime_part_decode_to_stream_async (TNY_MIME_PART (part),
 502                                               text_to_html_stream, decode_to_stream_cb,
 503                                               NULL, GINT_TO_POINTER (TRUE));
 504
 505         g_object_unref (G_OBJECT(text_to_html_stream));
 506         g_object_unref (G_OBJECT(tny_stream));
 507 }
 508
 509 static void
 510 set_empty_part (ModestGtkhtmlMimePartView *self)
 511 {
 512         g_return_if_fail (self);
 513
 514         g_signal_emit (G_OBJECT (self), signals[STOP_STREAMS_SIGNAL], 0);
 515         gtk_html_load_from_string (GTK_HTML(self), "", 1);
 516 }
 517
 518 static void
 519 set_part (ModestGtkhtmlMimePartView *self, TnyMimePart *part)
 520 {
 521         ModestGtkhtmlMimePartViewPrivate *priv;
 522         gchar *header_content_type, *header_content_type_lower;
 523         const gchar *tmp;
 524         gchar *charset = NULL;
 525
 526         g_return_if_fail (self);
 527
 528         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE(self);
 529         priv->has_external_images = FALSE;
 530
 531         if (part != priv->part) {
 532                 if (priv->part)
 533                         g_object_unref (G_OBJECT(priv->part));
 534                 if (part)
 535                         g_object_ref   (G_OBJECT(part));
 536                 priv->part = part;
 537         }
 538
 539         if (!part) {
 540                 set_empty_part (self);
 541                 return;
 542         }
 543
 544         header_content_type = modest_tny_mime_part_get_header_value (part, "Content-Type");
 545         if (header_content_type) {
 546                 header_content_type = g_strstrip (header_content_type);
 547                 header_content_type_lower = g_ascii_strdown (header_content_type, -1);
 548         } else {
 549                 header_content_type_lower = NULL;
 550         }
 551
 552         if (header_content_type_lower) {
 553                 tmp = strstr (header_content_type_lower, "charset=");
 554                 if (tmp) {
 555                         const gchar *tmp2;
 556                         tmp = tmp + strlen ("charset=");
 557
 558                         tmp2 = strstr (tmp, ";");
 559                         if (tmp2) {
 560                                 charset = g_strndup (tmp, tmp2-tmp);
 561                         } else {
 562                                 charset = g_strdup (tmp);
 563                         }
 564                 }
 565         }
 566
 567         if (tny_mime_part_content_type_is (part, "text/html")) {
 568                 set_html_part (self, part, charset);
 569         } else {
 570                 if (tny_mime_part_content_type_is (part, "message/rfc822")) {
 571                         if (header_content_type) {
 572                                 if (g_str_has_prefix (header_content_type_lower, "text/html"))
 573                                         set_html_part (self, part, charset);
 574                                 else
 575                                         set_text_part (self, part);
 576
 577                         } else {
 578                                 set_text_part (self, part);
 579                         }
 580                 } else {
 581                         set_text_part (self, part);
 582                 }
 583         }
 584         g_free (header_content_type_lower);
 585         g_free (header_content_type);
 586
 587 }
 588
 589 static TnyMimePart*
 590 get_part (ModestGtkhtmlMimePartView *self)
 591 {
 592         TnyMimePart *part;
 593
 594         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), NULL);
 595
 596         part = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE(self)->part;
 597
 598         if (part)
 599                 g_object_ref (part);
 600
 601         return part;
 602 }
 603
 604 static gboolean
 605 has_contents_receiver (gpointer engine, const gchar *data,
 606                        size_t len, gboolean *has_contents)
 607 {
 608         if (len > 1 || ((len == 1)&&(data[0]!='\n'))) {
 609                 *has_contents = TRUE;
 610                 return FALSE;
 611         }
 612         return TRUE;
 613 }
 614
 615 static gboolean
 616 is_empty   (ModestGtkhtmlMimePartView *self)
 617 {
 618         /* TODO: Find some gtkhtml API to check whether there is any (visible, non markup)
 619          * text in the message:
 620          */
 621         gboolean has_contents = FALSE;
 622
 623         gtk_html_export (GTK_HTML (self), "text/plain",
 624                          (GtkHTMLSaveReceiverFn) has_contents_receiver, &has_contents);
 625
 626         return !has_contents;
 627 }
 628
 629 static gboolean
 630 get_view_images   (ModestGtkhtmlMimePartView *self)
 631 {
 632         ModestGtkhtmlMimePartViewPrivate *priv;
 633
 634         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 635
 636         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 637         return priv->view_images;
 638 }
 639
 640 static void
 641 set_view_images   (ModestGtkhtmlMimePartView *self, gboolean view_images)
 642 {
 643         ModestGtkhtmlMimePartViewPrivate *priv;
 644
 645         g_return_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self));
 646
 647         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 648         priv->view_images = view_images;
 649 }
 650
 651 static gboolean
 652 has_external_images   (ModestGtkhtmlMimePartView *self)
 653 {
 654         ModestGtkhtmlMimePartViewPrivate *priv;
 655
 656         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 657
 658         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 659         return priv->has_external_images;
 660 }
 661
 662 static void
 663 set_zoom (ModestGtkhtmlMimePartView *self, gdouble zoom)
 664 {
 665         ModestGtkhtmlMimePartViewPrivate *priv;
 666
 667         g_return_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self));
 668
 669         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 670         priv->current_zoom = zoom;
 671         gtk_html_set_magnification (GTK_HTML(self), zoom);
 672
 673         gtk_widget_queue_resize (GTK_WIDGET (self));
 674 }
 675
 676 static gdouble
 677 get_zoom (ModestGtkhtmlMimePartView *self)
 678 {
 679         ModestGtkhtmlMimePartViewPrivate *priv;
 680
 681         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), 1.0);
 682
 683         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 684
 685         return priv->current_zoom;
 686 }
 687
 688 static gboolean
 689 search (ModestGtkhtmlMimePartView *self,
 690         const gchar *string)
 691 {
 692         return gtk_html_engine_search (GTK_HTML (self),
 693                                        string,
 694                                        FALSE,   /* case sensitive */
 695                                        TRUE,    /* forward */
 696                                        FALSE);  /* regexp */
 697 }
 698
 699 static gboolean
 700 search_next (ModestGtkhtmlMimePartView *self)
 701 {
 702         return gtk_html_engine_search_next (GTK_HTML (self));
 703 }
 704
 705 static gboolean
 706 get_selection_area (ModestGtkhtmlMimePartView *self,
 707                     gint *x, gint *y,
 708                     gint *width, gint *height)
 709 {
 710 #ifdef HAVE_GTK_HTML_GET_SELECTION_AREA
 711         gtk_html_get_selection_area (GTK_HTML (self), x, y, width, height);
 712         return TRUE;
 713 #else
 714         return FALSE;
 715 #endif
 716 }
 717
 718
 719 /* TNY MIME PART IMPLEMENTATION */
 720
 721 static void
 722 tny_mime_part_view_init (gpointer g, gpointer iface_data)
 723 {
 724         TnyMimePartViewIface *klass = (TnyMimePartViewIface *)g;
 725
 726         klass->get_part = modest_gtkhtml_mime_part_view_get_part;
 727         klass->set_part = modest_gtkhtml_mime_part_view_set_part;
 728         klass->clear = modest_gtkhtml_mime_part_view_clear;
 729
 730         return;
 731 }
 732
 733 static TnyMimePart*
 734 modest_gtkhtml_mime_part_view_get_part (TnyMimePartView *self)
 735 {
 736         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->get_part_func (self);
 737 }
 738
 739
 740 static TnyMimePart*
 741 modest_gtkhtml_mime_part_view_get_part_default (TnyMimePartView *self)
 742 {
 743         return TNY_MIME_PART (get_part (MODEST_GTKHTML_MIME_PART_VIEW (self)));
 744 }
 745
 746 static void
 747 modest_gtkhtml_mime_part_view_set_part (TnyMimePartView *self,
 748                                         TnyMimePart *part)
 749 {
 750         MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->set_part_func (self, part);
 751 }
 752
 753 static void
 754 modest_gtkhtml_mime_part_view_set_part_default (TnyMimePartView *self,
 755                                                 TnyMimePart *part)
 756 {
 757         g_return_if_fail ((part == NULL) || TNY_IS_MIME_PART (part));
 758
 759         set_part (MODEST_GTKHTML_MIME_PART_VIEW (self), part);
 760 }
 761
 762 static void
 763 modest_gtkhtml_mime_part_view_clear (TnyMimePartView *self)
 764 {
 765         MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->clear_func (self);
 766 }
 767
 768 static void
 769 modest_gtkhtml_mime_part_view_clear_default (TnyMimePartView *self)
 770 {
 771         set_part (MODEST_GTKHTML_MIME_PART_VIEW (self), NULL);
 772 }
 773
 774 /* MODEST MIME PART VIEW IMPLEMENTATION */
 775
 776 static void
 777 modest_mime_part_view_init (gpointer g, gpointer iface_data)
 778 {
 779         ModestMimePartViewIface *klass = (ModestMimePartViewIface *)g;
 780
 781         klass->is_empty_func = modest_gtkhtml_mime_part_view_is_empty;
 782         klass->get_view_images_func = modest_gtkhtml_mime_part_view_get_view_images;
 783         klass->set_view_images_func = modest_gtkhtml_mime_part_view_set_view_images;
 784         klass->has_external_images_func = modest_gtkhtml_mime_part_view_has_external_images;
 785
 786         return;
 787 }
 788
 789 static gboolean
 790 modest_gtkhtml_mime_part_view_is_empty (ModestMimePartView *self)
 791 {
 792         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->is_empty_func (self);
 793 }
 794
 795 static gboolean
 796 modest_gtkhtml_mime_part_view_get_view_images (ModestMimePartView *self)
 797 {
 798         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->get_view_images_func (self);
 799 }
 800
 801 static void
 802 modest_gtkhtml_mime_part_view_set_view_images (ModestMimePartView *self, gboolean view_images)
 803 {
 804         MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->set_view_images_func (self, view_images);
 805 }
 806
 807 static gboolean
 808 modest_gtkhtml_mime_part_view_has_external_images (ModestMimePartView *self)
 809 {
 810         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->has_external_images_func (self);
 811 }
 812
 813 static gboolean
 814 modest_gtkhtml_mime_part_view_is_empty_default (ModestMimePartView *self)
 815 {
 816         return is_empty (MODEST_GTKHTML_MIME_PART_VIEW (self));
 817 }
 818
 819 static gboolean
 820 modest_gtkhtml_mime_part_view_get_view_images_default (ModestMimePartView *self)
 821 {
 822         return get_view_images (MODEST_GTKHTML_MIME_PART_VIEW (self));
 823 }
 824
 825 static void
 826 modest_gtkhtml_mime_part_view_set_view_images_default (ModestMimePartView *self, gboolean view_images)
 827 {
 828         set_view_images (MODEST_GTKHTML_MIME_PART_VIEW (self), view_images);
 829 }
 830
 831 static gboolean
 832 modest_gtkhtml_mime_part_view_has_external_images_default (ModestMimePartView *self)
 833 {
 834         return has_external_images (MODEST_GTKHTML_MIME_PART_VIEW (self));
 835 }
 836
 837
 838 /* MODEST ZOOMABLE IMPLEMENTATION */
 839 static void
 840 modest_zoomable_init (gpointer g, gpointer iface_data)
 841 {
 842         ModestZoomableIface *klass = (ModestZoomableIface *)g;
 843
 844         klass->get_zoom_func = modest_gtkhtml_mime_part_view_get_zoom;
 845         klass->set_zoom_func = modest_gtkhtml_mime_part_view_set_zoom;
 846         klass->zoom_minus_func = modest_gtkhtml_mime_part_view_zoom_minus;
 847         klass->zoom_plus_func = modest_gtkhtml_mime_part_view_zoom_plus;
 848
 849         return;
 850 }
 851
 852 static gdouble
 853 modest_gtkhtml_mime_part_view_get_zoom (ModestZoomable *self)
 854 {
 855         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->get_zoom_func (self);
 856 }
 857
 858 static gdouble
 859 modest_gtkhtml_mime_part_view_get_zoom_default (ModestZoomable *self)
 860 {
 861         return get_zoom (MODEST_GTKHTML_MIME_PART_VIEW (self));
 862 }
 863
 864 static void
 865 modest_gtkhtml_mime_part_view_set_zoom (ModestZoomable *self, gdouble value)
 866 {
 867         MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->set_zoom_func (self, value);
 868 }
 869
 870 static void
 871 modest_gtkhtml_mime_part_view_set_zoom_default (ModestZoomable *self, gdouble value)
 872 {
 873         set_zoom (MODEST_GTKHTML_MIME_PART_VIEW (self), value);
 874 }
 875
 876 static gboolean
 877 modest_gtkhtml_mime_part_view_zoom_minus (ModestZoomable *self)
 878 {
 879         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->zoom_minus_func (self);
 880 }
 881
 882 static gboolean
 883 modest_gtkhtml_mime_part_view_zoom_minus_default (ModestZoomable *self)
 884 {
 885         /* operation not supported in ModestGtkhtmlMimePartView */
 886         return FALSE;
 887 }
 888
 889 static gboolean
 890 modest_gtkhtml_mime_part_view_zoom_plus (ModestZoomable *self)
 891 {
 892         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->zoom_plus_func (self);
 893 }
 894
 895 static gboolean
 896 modest_gtkhtml_mime_part_view_zoom_plus_default (ModestZoomable *self)
 897 {
 898         /* operation not supported in ModestGtkhtmlMimePartView */
 899         return FALSE;
 900 }
 901
 902 /* ISEARCH VIEW IMPLEMENTATION */
 903 static void
 904 modest_isearch_view_init (gpointer g, gpointer iface_data)
 905 {
 906         ModestISearchViewIface *klass = (ModestISearchViewIface *)g;
 907
 908         klass->search_func = modest_gtkhtml_mime_part_view_search;
 909         klass->search_next_func = modest_gtkhtml_mime_part_view_search_next;
 910         klass->get_selection_area_func = modest_gtkhtml_mime_part_view_get_selection_area;
 911
 912         return;
 913 }
 914
 915 static gboolean
 916 modest_gtkhtml_mime_part_view_search (ModestISearchView *self, const gchar *string)
 917 {
 918         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->search_func (self, string);
 919 }
 920
 921 static gboolean
 922 modest_gtkhtml_mime_part_view_search_default (ModestISearchView *self, const gchar *string)
 923 {
 924         return search (MODEST_GTKHTML_MIME_PART_VIEW (self), string);
 925 }
 926
 927 static gboolean
 928 modest_gtkhtml_mime_part_view_search_next(ModestISearchView *self)
 929 {
 930         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->search_next_func (self);
 931 }
 932
 933 static gboolean
 934 modest_gtkhtml_mime_part_view_search_next_default (ModestISearchView *self)
 935 {
 936         return search_next (MODEST_GTKHTML_MIME_PART_VIEW (self));
 937 }
 938
 939 static gboolean
 940 modest_gtkhtml_mime_part_view_get_selection_area (ModestISearchView *self, gint *x, gint *y,
 941                                                   gint *width, gint *height)
 942 {
 943         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->get_selection_area_func (self, x, y, width, height);
 944 }
 945
 946 static gboolean
 947 modest_gtkhtml_mime_part_view_get_selection_area_default (ModestISearchView *self, gint *x, gint *y,
 948                                                           gint *width, gint *height)
 949 {
 950         return get_selection_area (MODEST_GTKHTML_MIME_PART_VIEW (self), x, y, width, height);
 951 }