[evolution-patches] patch for #49702

[Bill Zhu <bill zhu sun com>]

This patch fix the bug of "Find window lacks error messages"
Also see:

	http://bugzilla.ximian.com/show_bug.cgi?id=49702

Comments:
I use the existing dialog each time. 
And maintain one dialog till the composer is destroyed.

? components/html-editor/GNOME_GtkHTML_Editor-emacs.xml
? components/html-editor/test_editor
Index: components/html-editor/ChangeLog
===================================================================
RCS file: /cvs/gnome/gtkhtml/components/html-editor/ChangeLog,v
retrieving revision 1.410.2.12
diff -u -p -r1.410.2.12 ChangeLog
--- components/html-editor/ChangeLog	10 Dec 2003 03:35:55 -0000	1.410.2.12
+++ components/html-editor/ChangeLog	22 Dec 2003 11:05:02 -0000
@@ -0,0 +0,8 @@
+2003-12-12  Charles Zhang  <charles zhang sun com>
+
+	* search.c (search): use existing find dialog, not new one blindly.
+	(search_dialog_response): if not found, disable the Find button
+	and leave dialog visible to indicate the user.
+	(entry_changed): enable the Find button when entry changed.
+	Fixes bug #49702
+
Index: components/html-editor/search.c
===================================================================
RCS file: /cvs/gnome/gtkhtml/components/html-editor/search.c,v
retrieving revision 1.22
diff -u -p -r1.22 search.c
--- components/html-editor/search.c	12 May 2003 20:46:48 -0000	1.22
+++ components/html-editor/search.c	22 Dec 2003 11:05:02 -0000
@@ -44,6 +44,8 @@ entry_changed (GtkWidget *entry, GtkHTML
 	if (d->cd->search_text)
 		g_free (d->cd->search_text);
 	d->cd->search_text = g_strdup (gtk_entry_get_text (GTK_ENTRY (d->entry)));
+
+	gtk_dialog_set_response_sensitive (d->dialog, 0, TRUE);
 }
 
 static void
@@ -55,12 +57,22 @@ entry_activate (GtkWidget *entry, GtkHTM
 static void
 search_dialog_response (GtkDialog *dialog, gint response_id, GtkHTMLSearchDialog *d)
 {
+	g_assert (d && d->dialog );
+
 	switch (response_id) {
 	case 0: /* Search */
-		gtk_widget_hide (GTK_WIDGET (d->dialog));
-		html_engine_search (d->html->engine, gtk_entry_get_text (GTK_ENTRY (d->entry)),
-				    GTK_TOGGLE_BUTTON (d->case_sensitive)->active,
-				    GTK_TOGGLE_BUTTON (d->backward)->active == 0, d->cd->regular);
+		if (!html_engine_search (d->html->engine, gtk_entry_get_text (GTK_ENTRY (d->entry)),
+					 GTK_TOGGLE_BUTTON (d->case_sensitive)->active,
+					 GTK_TOGGLE_BUTTON (d->backward)->active == 0, d->cd->regular))
+			gtk_dialog_set_response_sensitive (d->dialog, 0, FALSE);
+		else
+			gtk_widget_hide (d->dialog);
+		break;
+
+	case GTK_RESPONSE_DELETE_EVENT:
+	case GTK_RESPONSE_CLOSE:
+		gtk_dialog_set_response_sensitive (d->dialog, 0, TRUE);
+		gtk_widget_hide (d->dialog);
 		break;
 	}
 }
@@ -115,6 +127,8 @@ gtk_html_search_dialog_new (GtkHTML *htm
 void
 gtk_html_search_dialog_destroy (GtkHTMLSearchDialog *d)
 {
+	g_assert (d && d->dialog);
+
 	gtk_widget_destroy (GTK_WIDGET (d->dialog));
 	g_free (d);
 }
@@ -124,8 +138,13 @@ search (GtkHTMLControlData *cd, gboolean
 {
 	cd->regular = regular;
 	RUN_DIALOG (search, regular ? _("Find Regular Expression") :  _("Find"));
-	gtk_html_search_dialog_destroy (cd->search_dialog);
-	cd->search_dialog = NULL;
+
+	g_assert (cd->search_dialog && cd->search_dialog->dialog);
+
+	if (!GTK_WIDGET_VISIBLE (cd->search_dialog->dialog)) {
+		gtk_html_search_dialog_destroy (cd->search_dialog);
+		cd->search_dialog = NULL;
+	}
 }
 
 void