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
  48 /* gobject structure methods */
  49 static void    modest_gtkhtml_mime_part_view_class_init (ModestGtkhtmlMimePartViewClass *klass);
  50 static void    tny_mime_part_view_init                  (gpointer g, gpointer iface_data);
  51 static void    modest_mime_part_view_init               (gpointer g, gpointer iface_data);
  52 static void    modest_zoomable_init                     (gpointer g, gpointer iface_data);
  53 static void    modest_isearch_view_init                 (gpointer g, gpointer iface_data);
  54 static void    modest_gtkhtml_mime_part_view_init       (ModestGtkhtmlMimePartView *self);
  55 static void    modest_gtkhtml_mime_part_view_finalize   (GObject *self);
  56 static void    modest_gtkhtml_mime_part_view_dispose    (GObject *self);
  57
  58 /* GtkHTML signal handlers */
  59 static gboolean  on_link_clicked  (GtkWidget *widget, const gchar *uri, ModestGtkhtmlMimePartView *self);
  60 static gboolean  on_url           (GtkWidget *widget, const gchar *uri, ModestGtkhtmlMimePartView *self);
  61 static gboolean  on_url_requested (GtkWidget *widget, const gchar *uri, GtkHTMLStream *stream,
  62                                    ModestGtkhtmlMimePartView *self);
  63 /* TnyMimePartView implementation */
  64 static void modest_gtkhtml_mime_part_view_clear (TnyMimePartView *self);
  65 static void modest_gtkhtml_mime_part_view_clear_default (TnyMimePartView *self);
  66 static void modest_gtkhtml_mime_part_view_set_part (TnyMimePartView *self, TnyMimePart *part);
  67 static void modest_gtkhtml_mime_part_view_set_part_default (TnyMimePartView *self, TnyMimePart *part);
  68 static TnyMimePart* modest_gtkhtml_mime_part_view_get_part (TnyMimePartView *self);
  69 static TnyMimePart* modest_gtkhtml_mime_part_view_get_part_default (TnyMimePartView *self);
  70 /* ModestMimePartView implementation */
  71 static gboolean modest_gtkhtml_mime_part_view_is_empty (ModestMimePartView *self);
  72 static gboolean modest_gtkhtml_mime_part_view_is_empty_default (ModestMimePartView *self);
  73 static gboolean modest_gtkhtml_mime_part_view_get_view_images (ModestMimePartView *self);
  74 static gboolean modest_gtkhtml_mime_part_view_get_view_images_default (ModestMimePartView *self);
  75 static void     modest_gtkhtml_mime_part_view_set_view_images (ModestMimePartView *self, gboolean view_images);
  76 static void     modest_gtkhtml_mime_part_view_set_view_images_default (ModestMimePartView *self, gboolean view_images);
  77 static gboolean modest_gtkhtml_mime_part_view_has_external_images (ModestMimePartView *self);
  78 static gboolean modest_gtkhtml_mime_part_view_has_external_images_default (ModestMimePartView *self);
  79 /* ModestZoomable implementation */
  80 static gdouble modest_gtkhtml_mime_part_view_get_zoom (ModestZoomable *self);
  81 static void modest_gtkhtml_mime_part_view_set_zoom (ModestZoomable *self, gdouble value);
  82 static gboolean modest_gtkhtml_mime_part_view_zoom_minus (ModestZoomable *self);
  83 static gboolean modest_gtkhtml_mime_part_view_zoom_plus (ModestZoomable *self);
  84 static gdouble modest_gtkhtml_mime_part_view_get_zoom_default (ModestZoomable *self);
  85 static void modest_gtkhtml_mime_part_view_set_zoom_default (ModestZoomable *self, gdouble value);
  86 static gboolean modest_gtkhtml_mime_part_view_zoom_minus_default (ModestZoomable *self);
  87 static gboolean modest_gtkhtml_mime_part_view_zoom_plus_default (ModestZoomable *self);
  88 /* ModestISearchView implementation */
  89 static gboolean modest_gtkhtml_mime_part_view_search                    (ModestISearchView *self, const gchar *string);
  90 static gboolean modest_gtkhtml_mime_part_view_search_next               (ModestISearchView *self);
  91 static gboolean modest_gtkhtml_mime_part_view_get_selection_area        (ModestISearchView *self, gint *x, gint *y,
  92                                                                          gint *width, gint *height);
  93 static gboolean modest_gtkhtml_mime_part_view_search_default            (ModestISearchView *self, const gchar *string);
  94 static gboolean modest_gtkhtml_mime_part_view_search_next_default       (ModestISearchView *self);
  95 static gboolean modest_gtkhtml_mime_part_view_get_selection_area_default (ModestISearchView *self, gint *x, gint *y,
  96                                                                           gint *width, gint *height);
  97
  98
  99 /* internal api */
 100 static TnyMimePart  *get_part   (ModestGtkhtmlMimePartView *self);
 101 static void          set_html_part   (ModestGtkhtmlMimePartView *self, TnyMimePart *part);
 102 static void          set_text_part   (ModestGtkhtmlMimePartView *self, TnyMimePart *part);
 103 static void          set_empty_part  (ModestGtkhtmlMimePartView *self);
 104 static void          set_part   (ModestGtkhtmlMimePartView *self, TnyMimePart *part);
 105 static gboolean      is_empty   (ModestGtkhtmlMimePartView *self);
 106 static gboolean      get_view_images   (ModestGtkhtmlMimePartView *self);
 107 static void          set_view_images   (ModestGtkhtmlMimePartView *self, gboolean view_images);
 108 static gboolean      has_external_images   (ModestGtkhtmlMimePartView *self);
 109 static void          set_zoom   (ModestGtkhtmlMimePartView *self, gdouble zoom);
 110 static gdouble       get_zoom   (ModestGtkhtmlMimePartView *self);
 111 static gboolean      has_contents_receiver (gpointer engine, const gchar *data,
 112                                             size_t len, gboolean *has_contents);
 113 static gboolean      search             (ModestGtkhtmlMimePartView *self, const gchar *string);
 114 static gboolean      search_next        (ModestGtkhtmlMimePartView *self);
 115 static gboolean      get_selection_area (ModestGtkhtmlMimePartView *self, gint *x, gint *y,
 116                                          gint *width, gint *height);
 117
 118 typedef struct _ModestGtkhtmlMimePartViewPrivate ModestGtkhtmlMimePartViewPrivate;
 119 struct _ModestGtkhtmlMimePartViewPrivate {
 120         TnyMimePart *part;
 121         gdouble current_zoom;
 122         gboolean view_images;
 123         gboolean has_external_images;
 124 };
 125
 126 #define MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE(o)      (G_TYPE_INSTANCE_GET_PRIVATE((o), \
 127                                                                                        MODEST_TYPE_GTKHTML_MIME_PART_VIEW, \
 128                                                                                        ModestGtkhtmlMimePartViewPrivate))
 129
 130 static GtkHTMLClass *parent_class = NULL;
 131
 132 GtkWidget *
 133 modest_gtkhtml_mime_part_view_new ()
 134 {
 135         return g_object_new (MODEST_TYPE_GTKHTML_MIME_PART_VIEW, NULL);
 136 }
 137
 138 /* GOBJECT IMPLEMENTATION */
 139 GType
 140 modest_gtkhtml_mime_part_view_get_type (void)
 141 {
 142         static GType my_type = 0;
 143         if (!my_type) {
 144                 static const GTypeInfo my_info = {
 145                         sizeof(ModestGtkhtmlMimePartViewClass),
 146                         NULL,           /* base init */
 147                         NULL,           /* base finalize */
 148                         (GClassInitFunc) modest_gtkhtml_mime_part_view_class_init,
 149                         NULL,           /* class finalize */
 150                         NULL,           /* class data */
 151                         sizeof(ModestGtkhtmlMimePartView),
 152                         1,              /* n_preallocs */
 153                         (GInstanceInitFunc) modest_gtkhtml_mime_part_view_init,
 154                         NULL
 155                 };
 156
 157                 static const GInterfaceInfo tny_mime_part_view_info =
 158                 {
 159                   (GInterfaceInitFunc) tny_mime_part_view_init, /* interface_init */
 160                   NULL,         /* interface_finalize */
 161                   NULL          /* interface_data */
 162                 };
 163
 164                 static const GInterfaceInfo modest_mime_part_view_info =
 165                 {
 166                   (GInterfaceInitFunc) modest_mime_part_view_init, /* interface_init */
 167                   NULL,         /* interface_finalize */
 168                   NULL          /* interface_data */
 169                 };
 170
 171                 static const GInterfaceInfo modest_zoomable_info =
 172                 {
 173                   (GInterfaceInitFunc) modest_zoomable_init, /* interface_init */
 174                   NULL,         /* interface_finalize */
 175                   NULL          /* interface_data */
 176                 };
 177
 178                 static const GInterfaceInfo modest_isearch_view_info =
 179                 {
 180                   (GInterfaceInitFunc) modest_isearch_view_init, /* interface_init */
 181                   NULL,         /* interface_finalize */
 182                   NULL          /* interface_data */
 183                 };
 184
 185                 my_type = g_type_register_static (GTK_TYPE_HTML,
 186                                                   "ModestGtkhtmlMimePartView",
 187                                                   &my_info, 0);
 188
 189                 g_type_add_interface_static (my_type, TNY_TYPE_MIME_PART_VIEW,
 190                         &tny_mime_part_view_info);
 191
 192                 g_type_add_interface_static (my_type, MODEST_TYPE_MIME_PART_VIEW,
 193                         &modest_mime_part_view_info);
 194
 195                 g_type_add_interface_static (my_type, MODEST_TYPE_ZOOMABLE,
 196                         &modest_zoomable_info);
 197                 g_type_add_interface_static (my_type, MODEST_TYPE_ISEARCH_VIEW,
 198                         &modest_isearch_view_info);
 199         }
 200         return my_type;
 201 }
 202
 203 static void
 204 modest_gtkhtml_mime_part_view_class_init (ModestGtkhtmlMimePartViewClass *klass)
 205 {
 206         GObjectClass *gobject_class;
 207         GtkBindingSet *binding_set;
 208
 209         gobject_class = (GObjectClass*) klass;
 210
 211         parent_class            = g_type_class_peek_parent (klass);
 212         gobject_class->dispose = modest_gtkhtml_mime_part_view_dispose;
 213         gobject_class->finalize = modest_gtkhtml_mime_part_view_finalize;
 214
 215         klass->get_part_func = modest_gtkhtml_mime_part_view_get_part_default;
 216         klass->set_part_func = modest_gtkhtml_mime_part_view_set_part_default;
 217         klass->clear_func = modest_gtkhtml_mime_part_view_clear_default;
 218         klass->is_empty_func = modest_gtkhtml_mime_part_view_is_empty_default;
 219         klass->get_view_images_func = modest_gtkhtml_mime_part_view_get_view_images_default;
 220         klass->set_view_images_func = modest_gtkhtml_mime_part_view_set_view_images_default;
 221         klass->has_external_images_func = modest_gtkhtml_mime_part_view_has_external_images_default;
 222         klass->get_zoom_func = modest_gtkhtml_mime_part_view_get_zoom_default;
 223         klass->set_zoom_func = modest_gtkhtml_mime_part_view_set_zoom_default;
 224         klass->zoom_minus_func = modest_gtkhtml_mime_part_view_zoom_minus_default;
 225         klass->zoom_plus_func = modest_gtkhtml_mime_part_view_zoom_plus_default;
 226         klass->search_func = modest_gtkhtml_mime_part_view_search_default;
 227         klass->search_next_func = modest_gtkhtml_mime_part_view_search_next_default;
 228         klass->get_selection_area_func = modest_gtkhtml_mime_part_view_get_selection_area_default;
 229
 230         binding_set = gtk_binding_set_by_class (klass);
 231         gtk_binding_entry_skip (binding_set, GDK_Down, 0);
 232         gtk_binding_entry_skip (binding_set, GDK_Up, 0);
 233         gtk_binding_entry_skip (binding_set, GDK_KP_Up, 0);
 234         gtk_binding_entry_skip (binding_set, GDK_KP_Down, 0);
 235         gtk_binding_entry_skip (binding_set, GDK_Page_Down, 0);
 236         gtk_binding_entry_skip (binding_set, GDK_Page_Up, 0);
 237         gtk_binding_entry_skip (binding_set, GDK_KP_Page_Up, 0);
 238         gtk_binding_entry_skip (binding_set, GDK_KP_Page_Down, 0);
 239         gtk_binding_entry_skip (binding_set, GDK_Home, 0);
 240         gtk_binding_entry_skip (binding_set, GDK_End, 0);
 241         gtk_binding_entry_skip (binding_set, GDK_KP_Home, 0);
 242         gtk_binding_entry_skip (binding_set, GDK_KP_End, 0);
 243
 244         g_type_class_add_private (gobject_class, sizeof(ModestGtkhtmlMimePartViewPrivate));
 245
 246 }
 247
 248 static void
 249 modest_gtkhtml_mime_part_view_init (ModestGtkhtmlMimePartView *self)
 250 {
 251         ModestGtkhtmlMimePartViewPrivate *priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 252
 253         gtk_html_set_editable        (GTK_HTML(self), FALSE);
 254         gtk_html_allow_selection     (GTK_HTML(self), TRUE);
 255         gtk_html_set_caret_mode      (GTK_HTML(self), FALSE);
 256         gtk_html_set_blocking        (GTK_HTML(self), TRUE);
 257         gtk_html_set_images_blocking (GTK_HTML(self), TRUE);
 258
 259         g_signal_connect (G_OBJECT(self), "link_clicked",
 260                           G_CALLBACK(on_link_clicked), self);
 261         g_signal_connect (G_OBJECT(self), "url_requested",
 262                           G_CALLBACK(on_url_requested), self);
 263         g_signal_connect (G_OBJECT(self), "on_url",
 264                           G_CALLBACK(on_url), self);
 265
 266         priv->part = NULL;
 267         priv->current_zoom = 1.0;
 268         priv->view_images = FALSE;
 269         priv->has_external_images = FALSE;
 270 }
 271
 272 static void
 273 modest_gtkhtml_mime_part_view_finalize (GObject *obj)
 274 {
 275         G_OBJECT_CLASS (parent_class)->finalize (obj);
 276 }
 277
 278 static void
 279 modest_gtkhtml_mime_part_view_dispose (GObject *obj)
 280 {
 281         ModestGtkhtmlMimePartViewPrivate *priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (obj);
 282
 283         if (priv->part) {
 284                 g_object_unref (priv->part);
 285                 priv->part = NULL;
 286         }
 287
 288         G_OBJECT_CLASS (parent_class)->dispose (obj);
 289 }
 290
 291 /* GTKHTML SIGNALS HANDLERS */
 292
 293 static gboolean
 294 on_link_clicked (GtkWidget *widget, const gchar *uri, ModestGtkhtmlMimePartView *self)
 295 {
 296         gboolean result;
 297         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 298
 299         g_signal_emit_by_name (G_OBJECT (self), "activate-link", uri, &result);
 300         return result;
 301 }
 302
 303 static gboolean
 304 on_url (GtkWidget *widget, const gchar *uri, ModestGtkhtmlMimePartView *self)
 305 {
 306         gboolean result;
 307         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 308
 309         g_signal_emit_by_name (G_OBJECT (self), "link-hover", uri, &result);
 310         return result;
 311 }
 312
 313 typedef struct {
 314         gpointer buffer;
 315         GtkHTML *html;
 316         GtkHTMLStream *stream;
 317 } ImageFetcherInfo;
 318
 319 static gboolean
 320 on_url_requested (GtkWidget *widget, const gchar *uri, GtkHTMLStream *stream,
 321                   ModestGtkhtmlMimePartView *self)
 322 {
 323         gboolean result;
 324         TnyStream *tny_stream;
 325         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 326
 327         if (g_str_has_prefix (uri, "http:")) {
 328                 ModestGtkhtmlMimePartViewPrivate *priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 329
 330                 if (!priv->view_images)
 331                         priv->has_external_images = TRUE;
 332         }
 333
 334         tny_stream = TNY_STREAM (modest_tny_stream_gtkhtml_new (stream, GTK_HTML (widget)));
 335         g_signal_emit_by_name (MODEST_MIME_PART_VIEW (self), "fetch-url", uri, tny_stream, &result);
 336         g_object_unref (tny_stream);
 337         return result;
 338 }
 339
 340 /* INTERNAL API */
 341
 342 static void
 343 set_html_part (ModestGtkhtmlMimePartView *self, TnyMimePart *part)
 344 {
 345         GtkHTMLStream *gtkhtml_stream;
 346         TnyStream *tny_stream;
 347
 348         g_return_if_fail (self);
 349         g_return_if_fail (part);
 350
 351         gtkhtml_stream = gtk_html_begin(GTK_HTML(self));
 352
 353         tny_stream     = TNY_STREAM(modest_tny_stream_gtkhtml_new (gtkhtml_stream, GTK_HTML (self)));
 354         tny_stream_reset (tny_stream);
 355
 356         tny_mime_part_decode_to_stream ((TnyMimePart*)part, tny_stream, NULL);
 357         tny_stream_close (tny_stream);
 358         g_object_unref (G_OBJECT(tny_stream));
 359 }
 360
 361 static void
 362 set_text_part (ModestGtkhtmlMimePartView *self, TnyMimePart *part)
 363 {
 364         TnyStream* text_to_html_stream, *tny_stream;
 365         GtkHTMLStream *gtkhtml_stream;
 366
 367         g_return_if_fail (self);
 368         g_return_if_fail (part);
 369
 370         gtkhtml_stream = gtk_html_begin(GTK_HTML(self));
 371         tny_stream =  TNY_STREAM(modest_tny_stream_gtkhtml_new (gtkhtml_stream, GTK_HTML (self)));
 372         text_to_html_stream = TNY_STREAM (modest_stream_text_to_html_new (tny_stream));
 373         modest_stream_text_to_html_set_linkify_limit (MODEST_STREAM_TEXT_TO_HTML (text_to_html_stream), 64*1024);
 374         modest_stream_text_to_html_set_full_limit (MODEST_STREAM_TEXT_TO_HTML (text_to_html_stream), 640*1024);
 375
 376         // FIXME: tinymail
 377         tny_mime_part_decode_to_stream ((TnyMimePart*)part, text_to_html_stream, NULL);
 378         tny_stream_write (text_to_html_stream, "\n", 1);
 379         tny_stream_reset (text_to_html_stream);
 380         tny_stream_close (text_to_html_stream);
 381
 382         g_object_unref (G_OBJECT(text_to_html_stream));
 383         g_object_unref (G_OBJECT(tny_stream));
 384         /* gtk_html_stream_destroy (gtkhtml_stream); */
 385 }
 386
 387 static void
 388 set_empty_part (ModestGtkhtmlMimePartView *self)
 389 {
 390         g_return_if_fail (self);
 391
 392         gtk_html_load_from_string (GTK_HTML(self),
 393                                    "", 1);
 394 }
 395
 396 static void
 397 set_part (ModestGtkhtmlMimePartView *self, TnyMimePart *part)
 398 {
 399         ModestGtkhtmlMimePartViewPrivate *priv;
 400
 401         g_return_if_fail (self);
 402
 403         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE(self);
 404         priv->has_external_images = FALSE;
 405
 406         if (part != priv->part) {
 407                 if (priv->part)
 408                         g_object_unref (G_OBJECT(priv->part));
 409                 if (part)
 410                         g_object_ref   (G_OBJECT(part));
 411                 priv->part = part;
 412         }
 413
 414         if (!part) {
 415                 set_empty_part (self);
 416                 return;
 417         }
 418
 419         if (tny_mime_part_content_type_is (part, "text/html")) {
 420                 set_html_part (self, part);
 421         } else {
 422                 if (tny_mime_part_content_type_is (part, "message/rfc822")) {
 423                         gchar *header_content_type, *header_content_type_lower;
 424                         header_content_type = modest_tny_mime_part_get_header_value (part, "Content-Type");
 425                         if (header_content_type) {
 426                                 header_content_type = g_strstrip (header_content_type);
 427                                 header_content_type_lower = g_ascii_strdown (header_content_type, -1);
 428
 429                                 if (!g_ascii_strcasecmp (header_content_type_lower, "text/html"))
 430                                         set_html_part (self, part);
 431                                 else
 432                                         set_text_part (self, part);
 433
 434                                 g_free (header_content_type_lower);
 435                                 g_free (header_content_type);
 436                         } else {
 437                                 set_text_part (self, part);
 438                         }
 439                 } else {
 440                         set_text_part (self, part);
 441                 }
 442         }
 443
 444 }
 445
 446 static TnyMimePart*
 447 get_part (ModestGtkhtmlMimePartView *self)
 448 {
 449         TnyMimePart *part;
 450
 451         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), NULL);
 452
 453         part = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE(self)->part;
 454
 455         if (part)
 456                 g_object_ref (part);
 457
 458         return part;
 459 }
 460
 461 static gboolean
 462 has_contents_receiver (gpointer engine, const gchar *data,
 463                        size_t len, gboolean *has_contents)
 464 {
 465         if (len > 1 || ((len == 1)&&(data[0]!='\n'))) {
 466                 *has_contents = TRUE;
 467                 return FALSE;
 468         }
 469         return TRUE;
 470 }
 471
 472 static gboolean
 473 is_empty   (ModestGtkhtmlMimePartView *self)
 474 {
 475         /* TODO: Find some gtkhtml API to check whether there is any (visible, non markup)
 476          * text in the message:
 477          */
 478         gboolean has_contents = FALSE;
 479
 480         gtk_html_export (GTK_HTML (self), "text/plain",
 481                          (GtkHTMLSaveReceiverFn) has_contents_receiver, &has_contents);
 482
 483         return !has_contents;
 484 }
 485
 486 static gboolean
 487 get_view_images   (ModestGtkhtmlMimePartView *self)
 488 {
 489         ModestGtkhtmlMimePartViewPrivate *priv;
 490
 491         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 492
 493         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 494         return priv->view_images;
 495 }
 496
 497 static void
 498 set_view_images   (ModestGtkhtmlMimePartView *self, gboolean view_images)
 499 {
 500         ModestGtkhtmlMimePartViewPrivate *priv;
 501
 502         g_return_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self));
 503
 504         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 505         priv->view_images = view_images;
 506 }
 507
 508 static gboolean
 509 has_external_images   (ModestGtkhtmlMimePartView *self)
 510 {
 511         ModestGtkhtmlMimePartViewPrivate *priv;
 512
 513         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 514
 515         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 516         return priv->has_external_images;
 517 }
 518
 519 static void
 520 set_zoom (ModestGtkhtmlMimePartView *self, gdouble zoom)
 521 {
 522         ModestGtkhtmlMimePartViewPrivate *priv;
 523
 524         g_return_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self));
 525
 526         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 527         priv->current_zoom = zoom;
 528         gtk_html_set_magnification (GTK_HTML(self), zoom);
 529
 530         gtk_widget_queue_resize (GTK_WIDGET (self));
 531 }
 532
 533 static gdouble
 534 get_zoom (ModestGtkhtmlMimePartView *self)
 535 {
 536         ModestGtkhtmlMimePartViewPrivate *priv;
 537
 538         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), 1.0);
 539
 540         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 541
 542         return priv->current_zoom;
 543 }
 544
 545 static gboolean
 546 search (ModestGtkhtmlMimePartView *self,
 547         const gchar *string)
 548 {
 549         return gtk_html_engine_search (GTK_HTML (self),
 550                                        string,
 551                                        FALSE,   /* case sensitive */
 552                                        TRUE,    /* forward */
 553                                        FALSE);  /* regexp */
 554 }
 555
 556 static gboolean
 557 search_next (ModestGtkhtmlMimePartView *self)
 558 {
 559         return gtk_html_engine_search_next (GTK_HTML (self));
 560 }
 561
 562 static gboolean
 563 get_selection_area (ModestGtkhtmlMimePartView *self,
 564                     gint *x, gint *y,
 565                     gint *width, gint *height)
 566 {
 567 #ifdef HAVE_GTK_HTML_GET_SELECTION_AREA
 568         gtk_html_get_selection_area (GTK_HTML (self), x, y, width, height);
 569         return TRUE;
 570 #else
 571         return FALSE;
 572 #endif
 573 }
 574
 575
 576 /* TNY MIME PART IMPLEMENTATION */
 577
 578 static void
 579 tny_mime_part_view_init (gpointer g, gpointer iface_data)
 580 {
 581         TnyMimePartViewIface *klass = (TnyMimePartViewIface *)g;
 582
 583         klass->get_part = modest_gtkhtml_mime_part_view_get_part;
 584         klass->set_part = modest_gtkhtml_mime_part_view_set_part;
 585         klass->clear = modest_gtkhtml_mime_part_view_clear;
 586
 587         return;
 588 }
 589
 590 static TnyMimePart*
 591 modest_gtkhtml_mime_part_view_get_part (TnyMimePartView *self)
 592 {
 593         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->get_part_func (self);
 594 }
 595
 596
 597 static TnyMimePart*
 598 modest_gtkhtml_mime_part_view_get_part_default (TnyMimePartView *self)
 599 {
 600         return TNY_MIME_PART (get_part (MODEST_GTKHTML_MIME_PART_VIEW (self)));
 601 }
 602
 603 static void
 604 modest_gtkhtml_mime_part_view_set_part (TnyMimePartView *self,
 605                                         TnyMimePart *part)
 606 {
 607         MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->set_part_func (self, part);
 608 }
 609
 610 static void
 611 modest_gtkhtml_mime_part_view_set_part_default (TnyMimePartView *self,
 612                                                 TnyMimePart *part)
 613 {
 614         g_return_if_fail ((part == NULL) || TNY_IS_MIME_PART (part));
 615
 616         set_part (MODEST_GTKHTML_MIME_PART_VIEW (self), part);
 617 }
 618
 619 static void
 620 modest_gtkhtml_mime_part_view_clear (TnyMimePartView *self)
 621 {
 622         MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->clear_func (self);
 623 }
 624
 625 static void
 626 modest_gtkhtml_mime_part_view_clear_default (TnyMimePartView *self)
 627 {
 628         set_part (MODEST_GTKHTML_MIME_PART_VIEW (self), NULL);
 629 }
 630
 631 /* MODEST MIME PART VIEW IMPLEMENTATION */
 632
 633 static void
 634 modest_mime_part_view_init (gpointer g, gpointer iface_data)
 635 {
 636         ModestMimePartViewIface *klass = (ModestMimePartViewIface *)g;
 637
 638         klass->is_empty_func = modest_gtkhtml_mime_part_view_is_empty;
 639         klass->get_view_images_func = modest_gtkhtml_mime_part_view_get_view_images;
 640         klass->set_view_images_func = modest_gtkhtml_mime_part_view_set_view_images;
 641         klass->has_external_images_func = modest_gtkhtml_mime_part_view_has_external_images;
 642
 643         return;
 644 }
 645
 646 static gboolean
 647 modest_gtkhtml_mime_part_view_is_empty (ModestMimePartView *self)
 648 {
 649         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->is_empty_func (self);
 650 }
 651
 652 static gboolean
 653 modest_gtkhtml_mime_part_view_get_view_images (ModestMimePartView *self)
 654 {
 655         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->get_view_images_func (self);
 656 }
 657
 658 static void
 659 modest_gtkhtml_mime_part_view_set_view_images (ModestMimePartView *self, gboolean view_images)
 660 {
 661         MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->set_view_images_func (self, view_images);
 662 }
 663
 664 static gboolean
 665 modest_gtkhtml_mime_part_view_has_external_images (ModestMimePartView *self)
 666 {
 667         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->has_external_images_func (self);
 668 }
 669
 670 static gboolean
 671 modest_gtkhtml_mime_part_view_is_empty_default (ModestMimePartView *self)
 672 {
 673         return is_empty (MODEST_GTKHTML_MIME_PART_VIEW (self));
 674 }
 675
 676 static gboolean
 677 modest_gtkhtml_mime_part_view_get_view_images_default (ModestMimePartView *self)
 678 {
 679         return get_view_images (MODEST_GTKHTML_MIME_PART_VIEW (self));
 680 }
 681
 682 static void
 683 modest_gtkhtml_mime_part_view_set_view_images_default (ModestMimePartView *self, gboolean view_images)
 684 {
 685         set_view_images (MODEST_GTKHTML_MIME_PART_VIEW (self), view_images);
 686 }
 687
 688 static gboolean
 689 modest_gtkhtml_mime_part_view_has_external_images_default (ModestMimePartView *self)
 690 {
 691         return has_external_images (MODEST_GTKHTML_MIME_PART_VIEW (self));
 692 }
 693
 694
 695 /* MODEST ZOOMABLE IMPLEMENTATION */
 696 static void
 697 modest_zoomable_init (gpointer g, gpointer iface_data)
 698 {
 699         ModestZoomableIface *klass = (ModestZoomableIface *)g;
 700
 701         klass->get_zoom_func = modest_gtkhtml_mime_part_view_get_zoom;
 702         klass->set_zoom_func = modest_gtkhtml_mime_part_view_set_zoom;
 703         klass->zoom_minus_func = modest_gtkhtml_mime_part_view_zoom_minus;
 704         klass->zoom_plus_func = modest_gtkhtml_mime_part_view_zoom_plus;
 705
 706         return;
 707 }
 708
 709 static gdouble
 710 modest_gtkhtml_mime_part_view_get_zoom (ModestZoomable *self)
 711 {
 712         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->get_zoom_func (self);
 713 }
 714
 715 static gdouble
 716 modest_gtkhtml_mime_part_view_get_zoom_default (ModestZoomable *self)
 717 {
 718         return get_zoom (MODEST_GTKHTML_MIME_PART_VIEW (self));
 719 }
 720
 721 static void
 722 modest_gtkhtml_mime_part_view_set_zoom (ModestZoomable *self, gdouble value)
 723 {
 724         MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->set_zoom_func (self, value);
 725 }
 726
 727 static void
 728 modest_gtkhtml_mime_part_view_set_zoom_default (ModestZoomable *self, gdouble value)
 729 {
 730         set_zoom (MODEST_GTKHTML_MIME_PART_VIEW (self), value);
 731 }
 732
 733 static gboolean
 734 modest_gtkhtml_mime_part_view_zoom_minus (ModestZoomable *self)
 735 {
 736         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->zoom_minus_func (self);
 737 }
 738
 739 static gboolean
 740 modest_gtkhtml_mime_part_view_zoom_minus_default (ModestZoomable *self)
 741 {
 742         /* operation not supported in ModestGtkhtmlMimePartView */
 743         return FALSE;
 744 }
 745
 746 static gboolean
 747 modest_gtkhtml_mime_part_view_zoom_plus (ModestZoomable *self)
 748 {
 749         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->zoom_plus_func (self);
 750 }
 751
 752 static gboolean
 753 modest_gtkhtml_mime_part_view_zoom_plus_default (ModestZoomable *self)
 754 {
 755         /* operation not supported in ModestGtkhtmlMimePartView */
 756         return FALSE;
 757 }
 758
 759 /* ISEARCH VIEW IMPLEMENTATION */
 760 static void
 761 modest_isearch_view_init (gpointer g, gpointer iface_data)
 762 {
 763         ModestISearchViewIface *klass = (ModestISearchViewIface *)g;
 764
 765         klass->search_func = modest_gtkhtml_mime_part_view_search;
 766         klass->search_next_func = modest_gtkhtml_mime_part_view_search_next;
 767         klass->get_selection_area_func = modest_gtkhtml_mime_part_view_get_selection_area;
 768
 769         return;
 770 }
 771
 772 static gboolean
 773 modest_gtkhtml_mime_part_view_search (ModestISearchView *self, const gchar *string)
 774 {
 775         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->search_func (self, string);
 776 }
 777
 778 static gboolean
 779 modest_gtkhtml_mime_part_view_search_default (ModestISearchView *self, const gchar *string)
 780 {
 781         return search (MODEST_GTKHTML_MIME_PART_VIEW (self), string);
 782 }
 783
 784 static gboolean
 785 modest_gtkhtml_mime_part_view_search_next(ModestISearchView *self)
 786 {
 787         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->search_next_func (self);
 788 }
 789
 790 static gboolean
 791 modest_gtkhtml_mime_part_view_search_next_default (ModestISearchView *self)
 792 {
 793         return search_next (MODEST_GTKHTML_MIME_PART_VIEW (self));
 794 }
 795
 796 static gboolean
 797 modest_gtkhtml_mime_part_view_get_selection_area (ModestISearchView *self, gint *x, gint *y,
 798                                                   gint *width, gint *height)
 799 {
 800         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->get_selection_area_func (self, x, y, width, height);
 801 }
 802
 803 static gboolean
 804 modest_gtkhtml_mime_part_view_get_selection_area_default (ModestISearchView *self, gint *x, gint *y,
 805                                                           gint *width, gint *height)
 806 {
 807         return get_selection_area (MODEST_GTKHTML_MIME_PART_VIEW (self), x, y, width, height);
 808 }