add dasm-plugins/gui_hide_nops

metasm/gui/dasm_graph.rb

@@ -1316,8 +1316,14 @@ def build_ctx(ctx)
 			}
 		}
 
+		build_ctx_boxes(ctx)
+	end
+
+	def build_ctx_boxes(ctx)
 		# calc box dimensions/text
 		ctx.box.each { |b|
+			b[:line_address].clear
+			b[:line_text_col].clear
 			colstr = []
 			curaddr = nil
 			line = 0

samples/dasm-plugins/gui_hide_nops.rb

@@ -0,0 +1,19 @@
+#    This file is part of Metasm, the Ruby assembly manipulation suite
+#    Copyright (C) 2006-2009 Yoann GUILLOT
+#
+#    Licence is LGPL, see LICENCE in the top-level directory
+
+
+# metasm dasm GUI plugin: hide 'nop' instructions from the graph view
+if gui
+	gui.keyboard_callback[?H] = lambda { |*_|
+		next if not gui.curview.respond_to?(:curcontext)
+		addr = gui.curaddr
+		gui.curview.curcontext.box.each { |b|
+			b[:addresses].delete_if { |a| di_at(a) and di_at(a).opcode.name == 'nop' }
+		}
+		gui.curview.build_ctx_boxes(gui.curview.curcontext)
+		gui.curview.curcontext.auto_arrange_boxes
+		gui.focus_addr(addr)
+	}
+end