Added optional word wrap, controlled by new function

Mon Mar 23 01:04:51 1998  Owen Taylor  <owt1@cornell.edu>

	* gtk/gtktext.[ch] testgtk.c: Added optional word wrap, controlled
	  by new function gtk_text_set_word_wrap; and a check button
	  in the Text test.

	* gtk/gtktext.c: First line wasn't getting updated
	properly when selection was removed.

3 files changed, 73 insertions, 9 deletions

diff --git a/gtk/gtktext.c b/gtk/gtktext.c
index 3b77f44a82..e7ff57e129 100644
--- a/gtk/gtktext.c
+++ b/gtk/gtktext.c
@@ -518,6 +518,22 @@ gtk_text_new (GtkAdjustment *hadj,
 }
 
 void
+gtk_text_set_word_wrap (GtkText *text,
+			gint     word_wrap)
+{
+  g_return_if_fail (text != NULL);
+  g_return_if_fail (GTK_IS_TEXT (text));
+
+  text->word_wrap = (word_wrap != FALSE);
+  
+  if (GTK_WIDGET_DRAWABLE (text))
+    {
+      recompute_geometry (text);
+      gtk_widget_queue_draw (GTK_WIDGET (text));
+    }
+}
+
+void
 gtk_text_set_editable (GtkText *text,
 		       gint     editable)
 {
@@ -3940,8 +3956,33 @@ find_line_params (GtkText* text,
 		}
 	      else
 		{
-		  /* Don't include this character, it will wrap. */
-		  decrement_mark (&lp.end);
+		  if (text->word_wrap)
+		    {
+		      GtkPropertyMark saved_mark = lp.end;
+		      guint saved_characters = lp.displayable_chars;
+
+		      lp.displayable_chars += 1;
+		      
+		      while (!isspace (GTK_TEXT_INDEX (text, lp.end.index)) &&
+			     (lp.end.index > lp.start.index))
+			{
+			  decrement_mark (&lp.end);
+			  lp.displayable_chars -= 1;
+			}
+
+		      /* If whole line is one word, revert to char wrapping */
+		      if (lp.end.index == lp.start.index)
+			{
+			  lp.end = saved_mark;
+			  lp.displayable_chars = saved_characters;
+			  decrement_mark (&lp.end);
+			}
+		    }
+		  else
+		    {
+		      /* Don't include this character, it will wrap. */
+		      decrement_mark (&lp.end);
+		    }
 		}
 
 	      lp.tab_cont_next = *next_cont;
@@ -4502,7 +4543,7 @@ gtk_text_update_text    (GtkEditable       *editable,
 	  if (CACHE_DATA(cache).end.index >= start_pos)
 	    {
 	      if (area.y < 0)
-		area.y = pixels;
+		area.y = MAX(0,pixels);
 	      area.height = pixels + LINE_HEIGHT(CACHE_DATA(cache)) - area.y;
 	    }
 	}
diff --git a/gtk/gtktext.h b/gtk/gtktext.h
index 82aa25e7ab..12ca037bed 100644
--- a/gtk/gtktext.h
+++ b/gtk/gtktext.h
@@ -103,6 +103,7 @@ struct _GtkText
   guint line_wrap : 1;
   /* Frozen, don't do updates. @@@ fixme */
   guint freeze : 1;
+  guint word_wrap : 1;
 
 			/* TEXT PROPERTIES */
 
@@ -161,6 +162,8 @@ GtkWidget* gtk_text_new             (GtkAdjustment *hadj,
 				     GtkAdjustment *vadj);
 void       gtk_text_set_editable    (GtkText       *text,
 				     gint           editable);
+void       gtk_text_set_word_wrap   (GtkText       *text,
+				     gint           word_wrap);
 void       gtk_text_set_adjustments (GtkText       *text,
 				     GtkAdjustment *hadj,
 				     GtkAdjustment *vadj);
diff --git a/gtk/testgtk.c b/gtk/testgtk.c
index c18bf26e6a..b60780b506 100644
--- a/gtk/testgtk.c
+++ b/gtk/testgtk.c
@@ -3659,6 +3659,14 @@ text_toggle_editable (GtkWidget *checkbutton,
 			  GTK_TOGGLE_BUTTON(checkbutton)->active);
 }
 
+static void
+text_toggle_word_wrap (GtkWidget *checkbutton,
+		       GtkWidget *text)
+{
+   gtk_text_set_word_wrap(GTK_TEXT(text),
+			  GTK_TOGGLE_BUTTON(checkbutton)->active);
+}
+
 /*
  * GtkText
  */
@@ -3668,8 +3676,9 @@ create_text ()
   static GtkWidget *window = NULL;
   GtkWidget *box1;
   GtkWidget *box2;
+  GtkWidget *hbox;
   GtkWidget *button;
-  GtkWidget *editable_check;
+  GtkWidget *check;
   GtkWidget *separator;
   GtkWidget *table;
   GtkWidget *hscrollbar;
@@ -3760,12 +3769,23 @@ create_text ()
 
       gtk_text_thaw (GTK_TEXT (text));
 
-      editable_check = gtk_check_button_new_with_label("Editable");
-      gtk_box_pack_start (GTK_BOX (box2), editable_check, FALSE, TRUE, 0);
-      gtk_signal_connect (GTK_OBJECT(editable_check), "toggled",
+      hbox = gtk_hbutton_box_new ();
+      gtk_box_pack_start (GTK_BOX (box2), hbox, FALSE, FALSE, 0);
+      gtk_widget_show (hbox);
+
+      check = gtk_check_button_new_with_label("Editable");
+      gtk_box_pack_start (GTK_BOX (hbox), check, FALSE, FALSE, 0);
+      gtk_signal_connect (GTK_OBJECT(check), "toggled",
 			  GTK_SIGNAL_FUNC(text_toggle_editable), text);
-      gtk_toggle_button_set_state(GTK_TOGGLE_BUTTON(editable_check), TRUE);
-      gtk_widget_show (editable_check);
+      gtk_toggle_button_set_state(GTK_TOGGLE_BUTTON(check), TRUE);
+      gtk_widget_show (check);
+
+      check = gtk_check_button_new_with_label("Wrap Words");
+      gtk_box_pack_start (GTK_BOX (hbox), check, FALSE, TRUE, 0);
+      gtk_signal_connect (GTK_OBJECT(check), "toggled",
+			  GTK_SIGNAL_FUNC(text_toggle_word_wrap), text);
+      gtk_toggle_button_set_state(GTK_TOGGLE_BUTTON(check), FALSE);
+      gtk_widget_show (check);
 
       separator = gtk_hseparator_new ();
       gtk_box_pack_start (GTK_BOX (box1), separator, FALSE, TRUE, 0);