Initial revision

Lib/lib-stdwin/srcwin.py

@@ -0,0 +1,103 @@
+# srcwin.py -- a source listing window
+
+import stdwin
+from stdwinevents import *
+import basewin
+
+WIDTH = 40
+MAXHEIGHT = 24
+
+class SourceWindow(basewin.BaseWindow):
+	
+	def init(self, filename):
+		self.filename = filename
+		#
+		f = open(self.filename, 'r') # raise exception if not found
+		self.contents = f.read()
+		f.seek(0)
+		self.linecount = len(f.readlines())
+		f.close()
+		#
+		self.lineheight = lh = stdwin.lineheight()
+		self.leftmargin = stdwin.textwidth('00000000')
+		self.rightmargin = 30000 # Infinity
+		self.bottom = lh * self.linecount
+		#
+		stdwin.setdefwinpos(0, 0)
+		width = WIDTH*stdwin.textwidth('0')
+		height = lh*min(MAXHEIGHT, self.linecount)
+		stdwin.setdefwinsize(width, height)
+		self = basewin.BaseWindow.init(self, filename)
+		#
+		self.win.setdocsize(0, self.bottom + lh)
+		self.initeditor()
+		return self
+	
+	def initeditor(self):
+		r = (self.leftmargin, 0), (self.rightmargin, self.bottom)
+		self.editor = self.win.textcreate(r)
+		self.editor.settext(self.contents)
+	
+	def closeeditor(self):
+		self.editor.close()
+	
+	def reopen(self):
+		self.closeeditor()
+		basewin.BaseWindow.reopen(self)
+		self.initeditor()
+	
+	def close(self):
+		self.closeeditor()
+		basewin.BaseWindow.close(self)
+	
+	# Override this method to format line numbers differently
+	def getmark(self, lineno):
+		return `lineno`
+	
+	def dispatch(self, event):
+		if event[0] == WE_NULL: return # Dummy tested by mainloop
+		if event[0] == WE_DRAW or not self.editor.event(event):
+			basewin.BaseWindow.dispatch(self, event)
+	
+	def draw(self, detail):
+		dummy = self.editor.draw(detail)
+		# Draw line numbers
+		(left, top), (right, bottom) = detail
+		topline = top/self.lineheight
+		botline = bottom/self.lineheight + 1
+		botline = min(self.linecount, botline)
+		d = self.win.begindrawing()
+		try:
+			h, v = 0, self.lineheight * topline
+			for lineno in range(topline+1, botline+1):
+				d.text((h, v), self.getmark(lineno))
+				v = v + self.lineheight
+		finally:
+			d.close()
+	
+	def changemark(self, lineno):
+		left = 0
+		top = (lineno-1) * self.lineheight
+		right = self.leftmargin
+		bottom = lineno * self.lineheight
+		d = self.win.begindrawing()
+		try:
+			d.erase((left, top), (right, bottom))
+			d.text((left, top), self.getmark(lineno))
+		finally:
+			d.close()
+
+	def showline(self, lineno):
+		left = 0
+		top = (lineno-1) * self.lineheight
+		right = self.leftmargin
+		bottom = lineno * self.lineheight
+		self.win.show((left, top), (right, bottom))
+
+
+TESTFILE = 'srcwin.py'
+
+def test():
+	import mainloop
+	sw = SourceWindow().init(TESTFILE)
+	mainloop.mainloop()