text_page -> text_page_utils

svn path=/trunk/; revision=24973

1 files changed, 151 insertions, 0 deletions

diff --git a/gtk/text_page_utils.c b/gtk/text_page_utils.c
new file mode 100644
index 0000000000..f691cb0b01
--- /dev/null
+++ b/gtk/text_page_utils.c
@@ -0,0 +1,151 @@
+/* text_page_utils.c
+ *  Construct a simple text page widget from a file.
+ *
+ * $Id$
+ *
+ * Ulf Lamping
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 2000 Gerald Combs
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+#include <string.h>
+#include <stdio.h>
+#include <errno.h>
+
+#include <gtk/gtk.h>
+
+#include "epan/filesystem.h"
+
+#include "../simple_dialog.h"
+#include "wiretap/file_util.h"
+
+#include "gtk/text_page_utils.h"
+#include "gtk/gui_utils.h"
+#include "gtk/font_utils.h"
+
+
+#define TEXT_KEY        "txt_key"
+
+static void text_page_insert(GtkWidget *page, const char *buffer, int nchars);
+static void text_page_set_text(GtkWidget *page, const char *absolute_path);
+
+
+/*
+ * Construct a simple text page widget from a file.
+ */
+GtkWidget * text_page_new(const char *absolute_path)
+{
+  GtkWidget *page_vb, *txt_scrollw, *txt;
+
+  page_vb = gtk_vbox_new(FALSE, 0);
+  gtk_container_border_width(GTK_CONTAINER(page_vb), 1);
+  txt_scrollw = scrolled_window_new(NULL, NULL);
+    gtk_scrolled_window_set_shadow_type(GTK_SCROLLED_WINDOW(txt_scrollw), 
+                                   GTK_SHADOW_IN);
+  gtk_box_pack_start(GTK_BOX(page_vb), txt_scrollw, TRUE, TRUE, 0);
+
+  gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(txt_scrollw),
+				 GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
+  txt = gtk_text_view_new();
+  gtk_text_view_set_editable(GTK_TEXT_VIEW(txt), FALSE);
+  gtk_text_view_set_wrap_mode(GTK_TEXT_VIEW(txt), GTK_WRAP_WORD);
+  gtk_text_view_set_cursor_visible(GTK_TEXT_VIEW(txt), FALSE);
+  /* XXX: there seems to be no way to add a small border *around* the whole text,
+   * so the text will be "bump" against the edges.
+   * the following is only working for left and right edges,
+   * there is no such thing for top and bottom :-( */
+  /* gtk_text_view_set_left_margin(GTK_TEXT_VIEW(txt), 3); */
+  /* gtk_text_view_set_right_margin(GTK_TEXT_VIEW(txt), 3); */
+
+  g_object_set_data(G_OBJECT(page_vb), TEXT_KEY, txt);
+
+  text_page_set_text(page_vb, absolute_path);
+  gtk_container_add(GTK_CONTAINER(txt_scrollw), txt);
+  gtk_widget_show(txt_scrollw);
+  gtk_widget_show(txt);
+
+  return page_vb;
+}
+
+
+/*
+ * Insert some text to a text page.
+ */
+static void text_page_insert(GtkWidget *page, const char *buffer, int nchars)
+{
+    GtkWidget *txt = g_object_get_data(G_OBJECT(page), TEXT_KEY);
+
+    GtkTextBuffer *buf= gtk_text_view_get_buffer(GTK_TEXT_VIEW(txt));
+    GtkTextIter    iter;
+
+    gtk_text_buffer_get_end_iter(buf, &iter);
+    gtk_widget_modify_font(GTK_WIDGET(txt), user_font_get_regular());
+    if (!g_utf8_validate(buffer, -1, NULL))
+        printf("Invalid utf8 encoding: %s\n", buffer);
+    gtk_text_buffer_insert(buf, &iter, buffer, nchars);
+}
+
+
+/*
+ * Put the complete text file into a text page.
+ */
+static void text_page_set_text(GtkWidget *page, const char *absolute_path)
+{
+  FILE *text_file;
+  char line[4096+1];	/* XXX - size? */
+
+  text_file = eth_fopen(absolute_path, "r");
+  if (text_file != NULL) {
+    while (fgets(line, sizeof line, text_file) != NULL) {
+      text_page_insert(page, line, strlen(line));
+    }
+    if(ferror(text_file)) {
+      simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK, "Error reading file \"%s\": %s",
+                    absolute_path, strerror(errno));
+    }
+    fclose(text_file);
+  } else {
+      simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK, "Could not open file \"%s\": %s",
+                    absolute_path, strerror(errno));
+  }
+}
+
+
+/**
+ * Clear the text from the text page.
+ */
+static void text_page_clear(GtkWidget *page)
+{
+  GtkTextBuffer *buf = gtk_text_view_get_buffer(GTK_TEXT_VIEW(g_object_get_data(G_OBJECT(page), TEXT_KEY)));
+
+  gtk_text_buffer_set_text(buf, "", 0);
+}
+
+
+/**
+ * Redraw a single text page, e.g. to use a new font.
+ */
+void text_page_redraw(GtkWidget *page, const char *absolute_path)
+{
+  text_page_clear(page);
+  text_page_set_text(page, absolute_path);
+}