Fixes #53124

2004-04-18  JP Rosevear <jpr@ximian.com>

	Fixes #53124

	* gui/e-tasks.c: remove preview pieces, they are in their own
	class now; use the new class for preview

	* gui/e-cal-component-preview.[hc]: implement a preview area for
	tasks and events

svn path=/trunk/; revision=25505

1 files changed, 448 insertions, 0 deletions

diff --git a/calendar/gui/e-cal-component-preview.c b/calendar/gui/e-cal-component-preview.c
new file mode 100644
index 0000000000..91c48e1165
--- /dev/null
+++ b/calendar/gui/e-cal-component-preview.c
@@ -0,0 +1,448 @@
+/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
+/* e-tasks.c
+ *
+ * Copyright (C) 2001-2003  Ximian, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ *
+ * Authors: Federico Mena Quintero <federico@ximian.com>
+ *	    Damon Chaplin <damon@ximian.com>
+ *          Rodrigo Moya <rodrigo@ximian.com>
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <gnome.h>
+#include <gtk/gtk.h>
+#include <libgnomevfs/gnome-vfs-ops.h>
+#include <libecal/e-cal-time-util.h>
+#include <gal/util/e-util.h>
+#include <gtkhtml/gtkhtml.h>
+#include <gtkhtml/gtkhtml-stream.h>
+#include <e-util/e-time-utils.h>
+#include <e-util/e-categories-config.h>
+#include "calendar-config.h"
+#include "e-cal-component-preview.h"
+
+struct _ECalComponentPreviewPrivate {
+	GtkWidget *html;
+
+	icaltimezone *zone;
+};
+
+static GtkTableClass *parent_class;
+
+
+static void
+on_link_clicked (GtkHTML *html, const char *url, gpointer data)
+{
+        GError *err = NULL;
+
+        gnome_url_show (url, &err);
+
+	if (err) {
+		g_warning ("gnome_url_show: %s", err->message);
+                g_error_free (err);
+        }
+}
+
+static void
+on_url_cb (GtkHTML *html, const char *url, gpointer data)
+{
+#if 0
+	char *msg;
+	ECalComponentPreview *preview = data;
+
+	if (url && *url) {
+		msg = g_strdup_printf (_("Click to open %s"), url);
+		e_calendar_table_set_status_message (e_tasks_get_calendar_table (tasks), msg);
+		g_free (msg);
+	} else
+		e_calendar_table_set_status_message (e_tasks_get_calendar_table (tasks), NULL);
+#endif
+}
+
+/* Callback used when the user selects a URL in the HTML widget */
+static void
+url_requested_cb (GtkHTML *html, const char *url, GtkHTMLStream *stream, gpointer data)
+{
+	if (!strncmp ("file:///", url, strlen ("file:///"))) {
+		GnomeVFSHandle *handle;
+		GnomeVFSResult result;
+		char buffer[4096];
+
+		if (gnome_vfs_open (&handle, url, GNOME_VFS_OPEN_READ) == GNOME_VFS_OK) {
+			do {
+				GnomeVFSFileSize bread;
+
+				result = gnome_vfs_read (handle, buffer, sizeof (buffer), &bread);
+				if (result == GNOME_VFS_OK)
+					gtk_html_stream_write (stream, buffer, bread);
+			} while (result == GNOME_VFS_OK);
+
+			gnome_vfs_close (handle);
+		}
+	}
+}
+
+/* Converts a time_t to a string, relative to the specified timezone */
+static char *
+timet_to_str_with_zone (ECalComponentDateTime *dt, ECal *ecal, icaltimezone *default_zone)
+{
+	struct icaltimetype itt;
+	icaltimezone *zone;
+        struct tm tm;
+        char buf[256];                                                                                              
+
+	if (dt->tzid) {
+		/* If we can't find the zone, we'll guess its "local" */
+		if (!e_cal_get_timezone (ecal, dt->tzid, &zone, NULL))
+			zone = NULL;
+	} else if (dt->value->is_utc) {
+		zone = icaltimezone_get_utc_timezone ();
+	} else {
+		zone = NULL;
+	}
+	
+	
+	itt = *dt->value;
+	if (zone)
+		icaltimezone_convert_time (&itt, zone, default_zone);
+        tm = icaltimetype_to_tm (&itt);
+                                                                                              
+        e_time_format_date_and_time (&tm, calendar_config_get_24_hour_format (),
+                                     FALSE, FALSE, buf, sizeof (buf));
+
+	return g_locale_to_utf8 (buf, -1, NULL, NULL, NULL);
+}
+
+static void
+write_html (GtkHTMLStream *stream, ECal *ecal, ECalComponent *comp, icaltimezone *default_zone)
+{
+	ECalComponentText text;
+	ECalComponentDateTime dt;
+	gchar *str;
+	GSList *l;
+	icalproperty_status status;
+	const char *location;
+	int *priority_value;
+
+	g_return_if_fail (E_IS_CAL_COMPONENT (comp));
+
+	/* write document header */
+	e_cal_component_get_summary (comp, &text);
+
+	if (text.value)
+		gtk_html_stream_printf (stream,
+					"<HTML><BODY><H1>%s</H1>",
+					text.value);
+	else
+		gtk_html_stream_printf (stream,
+					"<HTML><BODY><H1><I>%s</I></H1>",
+					_("Untitled"));
+
+
+	/* write icons for the categories */
+	e_cal_component_get_categories_list (comp, &l);
+	if (l) {
+		GSList *node;
+
+		for (node = l; node != NULL; node = node->next) {
+			const char *icon_file;
+
+			icon_file = e_categories_config_get_icon_file_for ((const char *) node->data);
+			if (icon_file) {
+				gtk_html_stream_printf (stream, "<IMG ALT=\"%s\" SRC=\"file://%s\">",
+							(const char *) node->data, icon_file);
+			}
+		}
+
+		e_cal_component_free_categories_list (l);
+
+		gtk_html_stream_printf (stream, "<BR><BR><BR>");
+	}
+
+	/* Start table */
+	gtk_html_stream_printf (stream, "<TABLE BORDER=\"0\" WIDTH=\"80%%\">"
+				"<TR><TD VALIGN=\"TOP\" ALIGN=\"RIGHT\" WIDTH=\"15%%\"></TD></TR>");	
+
+	/* write location */
+	e_cal_component_get_location (comp, &location);
+	if (location)
+		gtk_html_stream_printf (stream, "<TR><TD VALIGN=\"TOP\" ALIGN=\"RIGHT\" WIDTH=\"15%%\"><B>%s</B></TD><TD>%s</TD></TR>",
+					_("Summary:"), text.value);
+
+	/* write start date */
+	e_cal_component_get_dtstart (comp, &dt);
+	if (dt.value != NULL) {
+		str = timet_to_str_with_zone (&dt, ecal, default_zone);
+		gtk_html_stream_printf (stream, "<TR><TD VALIGN=\"TOP\" ALIGN=\"RIGHT\"><B>%s</B></TD><TD>%s</TD></TR>",
+					_("Start Date:"), str);
+
+		e_cal_component_free_datetime (&dt);
+		g_free (str);
+	}
+
+	/* write end date */
+	e_cal_component_get_dtend (comp, &dt);
+	if (dt.value != NULL) {
+		str = timet_to_str_with_zone (&dt, ecal, default_zone);
+		gtk_html_stream_printf (stream, "<TR><TD VALIGN=\"TOP\" ALIGN=\"RIGHT\"><B>%s</B></TD><TD>%s</TD></TR>",
+					_("Start Date:"), str);
+
+		e_cal_component_free_datetime (&dt);
+		g_free (str);
+	}
+	
+	/* write Due Date */
+	e_cal_component_get_due (comp, &dt);
+	if (dt.value != NULL) {
+		str = timet_to_str_with_zone (&dt, ecal, default_zone);
+		gtk_html_stream_printf (stream, "<TR><TD VALIGN=\"TOP\" ALIGN=\"RIGHT\"><B>%s</B></TD><TD>%s</TD></TR>",
+					_("Due Date:"), str);
+
+		e_cal_component_free_datetime (&dt);
+		g_free (str);
+	}
+	
+	/* write status */
+	gtk_html_stream_printf (stream, "<TR><TD VALIGN=\"TOP\" ALIGN=\"RIGHT\"><B>%s</B></TD>", _("Status:"));
+	e_cal_component_get_status (comp, &status);
+	switch (status) {
+	case ICAL_STATUS_INPROCESS :
+		str = g_strdup (_("In Progress"));
+		break;
+	case ICAL_STATUS_COMPLETED :
+		str = g_strdup (_("Completed"));
+		break;
+	case ICAL_STATUS_CANCELLED :
+		str = g_strdup (_("Cancelled"));
+		break;
+	case ICAL_STATUS_NONE :
+	default :
+		str = g_strdup (_("Not Started"));
+		break;
+	}
+
+	gtk_html_stream_printf (stream, "<TD>%s</TD></TR>", str);
+	g_free (str);
+
+	/* write priority */
+	e_cal_component_get_priority (comp, &priority_value);
+	if (priority_value && *priority_value != 0) {
+		gtk_html_stream_printf (stream, "<TR><TD VALIGN=\"TOP\" ALIGN=\"RIGHT\"><B>%s</B></TD>", _("Priority:"));
+		if (*priority_value <= 4)
+			str = g_strdup (_("High"));
+		else if (*priority_value == 5)
+			str = g_strdup (_("Normal"));
+		else
+			str = g_strdup (_("Low"));
+
+		gtk_html_stream_printf (stream, "<TD>%s</TD></TR>", str);
+
+		g_free (str);
+		e_cal_component_free_priority (priority_value);
+	}
+
+	/* write description and URL */
+	gtk_html_stream_printf (stream, "<TR><TD COLSPAN=\"2\"><HR></TD></TR>");
+
+	e_cal_component_get_description_list (comp, &l);
+	if (l) {
+		GSList *node;
+
+		gtk_html_stream_printf (stream, "<TR><TD VALIGN=\"TOP\" ALIGN=\"RIGHT\"><B>%s</B></TD>", _("Description:"));
+
+		gtk_html_stream_printf (stream, "<TD>");
+
+		for (node = l; node != NULL; node = node->next) {
+			gint i;
+			GString *str = g_string_new ("");;
+
+			text = * (ECalComponentText *) node->data;
+			for (i = 0; i < strlen (text.value ? text.value : 0); i++) {
+				if (text.value[i] == '\n')
+					str = g_string_append (str, "<BR>");
+				else if (text.value[i] == '<')
+					str = g_string_append (str, "&lt;");
+				else if (text.value[i] == '>')
+					str = g_string_append (str, "&gt;");
+				else
+					str = g_string_append_c (str, text.value[i]);
+			}
+
+			gtk_html_stream_printf (stream, str->str);
+			g_string_free (str, TRUE);
+		}
+
+		gtk_html_stream_printf (stream, "</TD></TR>");
+
+		e_cal_component_free_text_list (l);
+	}
+
+	/* URL */
+	e_cal_component_get_url (comp, (const char **) &str);
+	if (str) {
+		gtk_html_stream_printf (stream, "<TR><TD VALIGN=\"TOP\" ALIGN=\"RIGHT\"><B>%s</B></TD>", _("Web Page:"));
+		gtk_html_stream_printf (stream, "<TD><A HREF=\"%s\">%s</A></TD></TR>", str, str);
+	}
+	
+	gtk_html_stream_printf (stream, "</TABLE>");
+
+	/* close document */
+	gtk_html_stream_printf (stream, "</BODY></HTML>");
+}
+
+static void
+e_cal_component_preview_init (ECalComponentPreview *preview)
+{
+	ECalComponentPreviewPrivate *priv;
+	GtkWidget *scroll;
+	
+	priv = g_new0 (ECalComponentPreviewPrivate, 1);
+	preview->priv = priv;
+
+	priv->html = gtk_html_new ();
+	gtk_html_set_default_content_type (GTK_HTML (priv->html), "charset=utf-8");
+	gtk_html_load_empty (GTK_HTML (priv->html));
+
+	g_signal_connect (G_OBJECT (priv->html), "url_requested",
+			  G_CALLBACK (url_requested_cb), NULL);
+	g_signal_connect (G_OBJECT (priv->html), "link_clicked",
+			  G_CALLBACK (on_link_clicked), preview);
+	g_signal_connect (G_OBJECT (priv->html), "on_url",
+			  G_CALLBACK (on_url_cb), preview);
+
+	scroll = gtk_scrolled_window_new (NULL, NULL);
+	gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scroll),
+					GTK_POLICY_AUTOMATIC,
+					GTK_POLICY_AUTOMATIC);
+	gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (scroll), GTK_SHADOW_IN);
+
+	gtk_container_add (GTK_CONTAINER (scroll), priv->html);
+	gtk_container_add (GTK_CONTAINER (preview), scroll);
+	gtk_widget_show_all (scroll);
+	
+	priv->zone = icaltimezone_get_utc_timezone ();
+}
+
+static void
+e_cal_component_preview_destroy (GtkObject *object)
+{
+	ECalComponentPreview *preview;
+	ECalComponentPreviewPrivate *priv;
+
+	g_return_if_fail (object != NULL);
+	g_return_if_fail (E_IS_CAL_COMPONENT_PREVIEW (object));
+
+	preview = E_CAL_COMPONENT_PREVIEW (object);
+	priv = preview->priv;
+
+	if (priv) {
+
+		g_free (priv);
+		preview->priv = NULL;
+	}
+
+	if (GTK_OBJECT_CLASS (parent_class)->destroy)
+		(* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
+}
+
+static void
+e_cal_component_preview_class_init (ECalComponentPreviewClass *klass)
+{
+	GtkObjectClass *object_class;
+	
+	object_class = (GtkObjectClass *) klass;
+	
+	parent_class = g_type_class_peek_parent (klass);
+	
+	object_class->destroy = e_cal_component_preview_destroy;
+}
+
+E_MAKE_TYPE (e_cal_component_preview, "ECalComponentPreview", ECalComponentPreview,
+	     e_cal_component_preview_class_init, e_cal_component_preview_init,
+	     GTK_TYPE_TABLE)
+
+GtkWidget *
+e_cal_component_preview_new (void)
+{
+	ECalComponentPreview *preview;
+
+	preview = g_object_new (e_cal_component_preview_get_type (), NULL);
+
+	return GTK_WIDGET (preview);
+}
+
+icaltimezone *
+e_cal_component_preview_get_default_timezone (ECalComponentPreview *preview)
+{
+	ECalComponentPreviewPrivate *priv;
+	
+	g_return_val_if_fail (preview != NULL, NULL);
+	g_return_val_if_fail (E_IS_CAL_COMPONENT_PREVIEW (preview), NULL);
+
+	priv = preview->priv;
+
+	return priv->zone;
+}
+
+void
+e_cal_component_preview_set_default_timezone (ECalComponentPreview *preview, icaltimezone *zone)
+{
+	ECalComponentPreviewPrivate *priv;
+	
+	g_return_if_fail (preview != NULL);
+	g_return_if_fail (E_IS_CAL_COMPONENT_PREVIEW (preview));
+	g_return_if_fail (zone != NULL);
+
+	priv = preview->priv;
+	
+	priv->zone = zone;
+}
+
+void
+e_cal_component_preview_display (ECalComponentPreview *preview, ECal *ecal, ECalComponent *comp)
+{
+	ECalComponentPreviewPrivate *priv;
+	GtkHTMLStream *stream;
+
+	g_return_if_fail (preview != NULL);
+	g_return_if_fail (E_IS_CAL_COMPONENT_PREVIEW (preview));
+	g_return_if_fail (comp != NULL);
+	g_return_if_fail (E_IS_CAL_COMPONENT (comp));
+
+	priv = preview->priv;
+	
+	stream = gtk_html_begin (GTK_HTML (priv->html));	
+	write_html (stream, ecal, comp, priv->zone);
+	gtk_html_stream_close (stream, GTK_HTML_STREAM_OK);
+}
+
+void
+e_cal_component_preview_clear (ECalComponentPreview *preview)
+{
+	ECalComponentPreviewPrivate *priv;
+
+	g_return_if_fail (preview != NULL);
+	g_return_if_fail (E_IS_CAL_COMPONENT_PREVIEW (preview));
+	
+	priv = preview->priv;
+	
+	gtk_html_load_empty (GTK_HTML (priv->html));
+}
+