+/* Copyright (c) 2009, Nokia Corporation
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * * Neither the name of the Nokia Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
+ * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+
+/* modest-stream-text-to-html.c */
+
+#include "modest-stream-html-to-text.h"
+#include <tny-stream.h>
+#include <string.h>
+#include <modest-text-utils.h>
+#include <gtkhtml/gtkhtml-stream.h>
+
+
+/* 'private'/'protected' functions */
+static void modest_stream_html_to_text_class_init (ModestStreamHtmlToTextClass *klass);
+static void modest_stream_html_to_text_init (ModestStreamHtmlToText *obj);
+static void modest_stream_html_to_text_finalize (GObject *obj);
+static void modest_stream_html_to_text_iface_init (gpointer g_iface, gpointer iface_data);
+
+typedef struct _ModestStreamHtmlToTextPrivate ModestStreamHtmlToTextPrivate;
+struct _ModestStreamHtmlToTextPrivate {
+ GString *buffer;
+ gint position;
+ GtkHTML *html;
+};
+#define MODEST_STREAM_HTML_TO_TEXT_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE((o), \
+ MODEST_TYPE_STREAM_HTML_TO_TEXT, \
+ ModestStreamHtmlToTextPrivate))
+/* globals */
+static GObjectClass *parent_class = NULL;
+
+GType
+modest_stream_html_to_text_get_type (void)
+{
+ static GType my_type = 0;
+ if (!my_type) {
+ static const GTypeInfo my_info = {
+ sizeof(ModestStreamHtmlToTextClass),
+ NULL, /* base init */
+ NULL, /* base finalize */
+ (GClassInitFunc) modest_stream_html_to_text_class_init,
+ NULL, /* class finalize */
+ NULL, /* class data */
+ sizeof(ModestStreamHtmlToText),
+ 1, /* n_preallocs */
+ (GInstanceInitFunc) modest_stream_html_to_text_init,
+ NULL
+ };
+
+ static const GInterfaceInfo iface_info = {
+ (GInterfaceInitFunc) modest_stream_html_to_text_iface_init,
+ NULL, /* interface_finalize */
+ NULL /* interface_data */
+ };
+
+ my_type = g_type_register_static (G_TYPE_OBJECT,
+ "ModestStreamHtmlToText",
+ &my_info, 0);
+
+ g_type_add_interface_static (my_type, TNY_TYPE_STREAM,
+ &iface_info);
+
+ }
+ return my_type;
+}
+
+static void
+modest_stream_html_to_text_class_init (ModestStreamHtmlToTextClass *klass)
+{
+ GObjectClass *gobject_class;
+ gobject_class = (GObjectClass*) klass;
+
+ parent_class = g_type_class_peek_parent (klass);
+ gobject_class->finalize = modest_stream_html_to_text_finalize;
+
+ g_type_class_add_private (gobject_class, sizeof(ModestStreamHtmlToTextPrivate));
+}
+
+static void
+modest_stream_html_to_text_init (ModestStreamHtmlToText *obj)
+{
+ ModestStreamHtmlToTextPrivate *priv;
+ priv = MODEST_STREAM_HTML_TO_TEXT_GET_PRIVATE(obj);
+
+ priv->position = 0;
+ priv->buffer = NULL;
+ priv->html = NULL;
+}
+
+static void
+modest_stream_html_to_text_finalize (GObject *obj)
+{
+ ModestStreamHtmlToTextPrivate *priv;
+
+ priv = MODEST_STREAM_HTML_TO_TEXT_GET_PRIVATE(obj);
+
+ if (priv->buffer)
+ g_string_free (priv->buffer, TRUE);
+}
+
+static gboolean
+export_to_txt_cb (const HTMLEngine * engine,
+ const char *data,
+ unsigned int len,
+ void *user_data)
+{
+ ModestStreamHtmlToTextPrivate *priv;
+
+ priv = MODEST_STREAM_HTML_TO_TEXT_GET_PRIVATE(user_data);
+
+ if (!priv->buffer)
+ priv->buffer = g_string_new (data);
+ else
+ g_string_append (priv->buffer, data);
+
+ return TRUE;
+}
+
+static gboolean
+parse_input_stream (ModestStreamHtmlToText *self,
+ TnyStream *in_stream)
+{
+ GString *buffer;
+ GtkHTMLStream *stream = NULL;
+ ModestStreamHtmlToTextPrivate *priv;
+ const guint BUFF_SIZE = 4096;
+ gchar buff[BUFF_SIZE];
+
+ priv = MODEST_STREAM_HTML_TO_TEXT_GET_PRIVATE(self);
+
+ buffer = g_string_new (NULL);
+ while (!tny_stream_is_eos (in_stream)) {
+ gint read;
+ read = tny_stream_read (in_stream, buff, BUFF_SIZE);
+ buffer = g_string_append_len (buffer, buff, read);
+ }
+ tny_stream_reset (in_stream);
+
+ priv->html = g_object_new (GTK_TYPE_HTML, "visible", FALSE, NULL);
+ gtk_html_set_default_engine (priv->html, TRUE);
+ stream = gtk_html_begin_full(priv->html, NULL, "text/html", 0);
+ gtk_html_write(priv->html, stream, buffer->str, buffer->len);
+ gtk_html_end(priv->html, stream, 0);
+
+ return gtk_html_export (priv->html, "text/plain",
+ (GtkHTMLSaveReceiverFn) export_to_txt_cb, self);
+}
+
+TnyStream *
+modest_stream_html_to_text_new (TnyStream *in_stream)
+{
+ GObject *obj;
+
+ obj = G_OBJECT(g_object_new(MODEST_TYPE_STREAM_HTML_TO_TEXT, NULL));
+
+ if (!parse_input_stream ((ModestStreamHtmlToText *) obj, in_stream)) {
+ g_warning ("%s: error parsing the input stream", __FUNCTION__);
+ g_object_unref (obj);
+ obj = NULL;
+ }
+
+ return (TnyStream *) obj;
+}
+
+/* the rest are interface functions */
+static ssize_t
+html_to_text_read (TnyStream *self, char *buffer, size_t n)
+{
+ ModestStreamHtmlToTextPrivate *priv;
+ gint i;
+
+ priv = MODEST_STREAM_HTML_TO_TEXT_GET_PRIVATE (self);
+
+ for (i = 0; (i < n) && ((priv->position + i) < priv->buffer->len) ; i++)
+ buffer[i] = priv->buffer->str[priv->position + i];
+
+ priv->position += i;
+
+ return i;
+}
+
+static ssize_t
+html_to_text_write (TnyStream *self, const char *buffer, size_t n)
+{
+ return -1; /* we cannot write */
+}
+
+static gint
+html_to_text_flush (TnyStream *self)
+{
+ /* ModestStreamHtmlToTextPrivate *priv = MODEST_STREAM_HTML_TO_TEXT_GET_PRIVATE (self); */
+
+ return 0;
+}
+
+
+static gint
+html_to_text_close (TnyStream *self)
+{
+ ModestStreamHtmlToTextPrivate *priv;
+
+ priv = MODEST_STREAM_HTML_TO_TEXT_GET_PRIVATE(self);
+
+ tny_stream_flush (self);
+
+ return 0;
+}
+
+
+static gboolean
+html_to_text_is_eos (TnyStream *self)
+{
+ ModestStreamHtmlToTextPrivate *priv;
+
+ priv = MODEST_STREAM_HTML_TO_TEXT_GET_PRIVATE(self);
+
+ return (priv->position >= (priv->buffer->len - 1));
+}
+
+
+
+static gint
+html_to_text_reset (TnyStream *self)
+{
+ ModestStreamHtmlToTextPrivate *priv;
+
+ priv = MODEST_STREAM_HTML_TO_TEXT_GET_PRIVATE(self);
+ priv->position = 0;
+
+ return priv->position;
+}
+
+
+static ssize_t
+html_to_text_write_to_stream (TnyStream *self, TnyStream *output)
+{
+ return 0;
+}
+
+
+static void
+modest_stream_html_to_text_iface_init (gpointer g_iface, gpointer iface_data)
+{
+ TnyStreamIface *klass;
+
+ g_return_if_fail (g_iface);
+
+ klass = (TnyStreamIface*) g_iface;
+
+ klass->read = html_to_text_read;
+ klass->write = html_to_text_write;
+ klass->flush = html_to_text_flush;
+ klass->close = html_to_text_close;
+ klass->is_eos = html_to_text_is_eos;
+ klass->reset = html_to_text_reset;
+ klass->write_to_stream = html_to_text_write_to_stream;
+}
projects / modest / commitdiff