From 0115ab105d160c6923f7a3449dbd9345d0fe4a65 Mon Sep 17 00:00:00 2001
From: hut <hut@lavabit.com>
Date: Wed, 23 Dec 2009 01:18:31 +0100
Subject: fixed / improved loader

---
 ranger/fm.py                    |  2 +-
 ranger/fsobject/directory.py    | 22 ++++++++++++++++++----
 ranger/fsobject/fsobject.py     |  1 +
 ranger/fsobject/loader.py       | 39 ++++++++++++++++++++-------------------
 ranger/gui/widgets/filelist.py  |  1 +
 ranger/gui/widgets/statusbar.py |  2 +-
 6 files changed, 42 insertions(+), 25 deletions(-)

diff --git a/ranger/fm.py b/ranger/fm.py
index 59568e68..a8db3b93 100644
--- a/ranger/fm.py
+++ b/ranger/fm.py
@@ -63,8 +63,8 @@ class FM(Actions):
 				try:
 					self.bookmarks.update_if_outdated()
 					self.ui.redraw()
+					self.ui.set_load_mode(self.loader.has_work())
 					self.loader.work()
-					self.ui.set_load_mode(self.loader)
 
 					key = self.ui.get_next_key()
 
diff --git a/ranger/fsobject/directory.py b/ranger/fsobject/directory.py
index 5ad07ef1..7fa130ec 100644
--- a/ranger/fsobject/directory.py
+++ b/ranger/fsobject/directory.py
@@ -2,6 +2,7 @@ from . import BAD_INFO
 from .file import File
 from .fsobject import FileSystemObject as SuperClass
 from ranger.shared import SettingsAware
+from ranger import log
 import ranger.fsobject
 
 def sort_by_basename(path):
@@ -17,6 +18,7 @@ class NoDirectoryGiven(Exception):
 
 class Directory(SuperClass, SettingsAware):
 	enterable = False
+	load_generator = None
 	loading = False
 
 	filenames = None
@@ -47,9 +49,12 @@ class Directory(SuperClass, SettingsAware):
 		"""Loads the contents of the directory. Use this sparingly since
 		it takes rather long.
 		"""
+
+		log("generating loader for " + self.path + "(" + str(id(self)) + ")")
 		from os.path import join, isdir, basename
 		from os import listdir
 
+		self.loading = True
 		self.load_if_outdated()
 		yield
 
@@ -89,7 +94,8 @@ class Directory(SuperClass, SettingsAware):
 
 		self.content_loaded = True
 		self.loading = False
-		yield
+#		yield
+#		yield
 
 	def load_content(self, schedule=False):
 		"""Loads the contents of the directory. Use this sparingly since
@@ -101,13 +107,21 @@ class Directory(SuperClass, SettingsAware):
 		if schedule is None:
 			schedule = self.size > 30
 
-		if not self.loading:
+		if self.load_generator is None:
+			self.load_generator = self.load_bit_by_bit()
+
 			if schedule and self.fm:
-				self.loading = True
 				self.fm.loader.add(self)
 			else:
-				for _ in self.load_bit_by_bit():
+				for _ in self.load_generator:
 					pass
+				self.load_generator = None
+
+		elif not schedule or not self.fm:
+			for _ in self.load_generator:
+				pass
+			self.load_generator = None
+
 
 	def sort(self):
 		"""Sort the containing files"""
diff --git a/ranger/fsobject/fsobject.py b/ranger/fsobject/fsobject.py
index 10a97fd5..c0ab6a9c 100644
--- a/ranger/fsobject/fsobject.py
+++ b/ranger/fsobject/fsobject.py
@@ -25,6 +25,7 @@ class FileSystemObject(MimeTypeAware, FileManagerAware):
 	infostring = None
 	permissions = None
 	type = T_UNKNOWN
+	size = 0
 
 	last_used = None
 
diff --git a/ranger/fsobject/loader.py b/ranger/fsobject/loader.py
index a1ebcc97..ef91aae3 100644
--- a/ranger/fsobject/loader.py
+++ b/ranger/fsobject/loader.py
@@ -14,7 +14,8 @@ def delayfunc(n):
 	if n < 4:
 		return 0.05
 	else:
-		return math.log(n-2) * 0.2
+		return 0.3
+#		return math.log(n-2) * 0.2
 
 class Loader(object):
 	seconds_of_work_time = 0.1
@@ -25,37 +26,37 @@ class Loader(object):
 		self.status_generator = status_generator()
 		self.tick = 0
 		self.rotate()
+		self.old_item = None
 	
 	def rotate(self):
 		self.status = next(self.status_generator)
 	
 	def add(self, obj):
-		self.queue.append(obj)
+		while obj in self.queue:
+			self.queue.remove(obj)
+		self.queue.appendleft(obj)
 
 	def work(self):
-		if self.item is None:
-			try:
-				self.item = self.queue.popleft()
-			except IndexError:
-				return
+		if not self.queue:
+			return
 
-			self.load_generator = self.item.load_bit_by_bit()
-			self.tick = 0
+		item = self.queue[0]
+		if item.load_generator is None:
+			self.queue.popleft()
 
 		self.rotate()
 		self.tick += 1
-		start_time = time()
-		end_time = time() + delayfunc(self.tick)
+		if item != self.old_item:
+			self.tick = 0
+			self.old_item = item
 
-		log(tuple(map(str, self.queue)))
+		end_time = time() + delayfunc(self.tick)
 		try:
-#			log("loading " + self.item.basename)
 			while time() < end_time:
-				next(self.load_generator)
-
+				next(item.load_generator)
 		except StopIteration:
-			self.item = None
-			self.load_generator = None
+			item.load_generator = None
+			self.queue.popleft()
 	
-	def __nonzero__(self):
-		return bool(self.queue or self.item is not None)
+	def has_work(self):
+		return bool(self.queue)
diff --git a/ranger/gui/widgets/filelist.py b/ranger/gui/widgets/filelist.py
index 952a6d45..2ece3077 100644
--- a/ranger/gui/widgets/filelist.py
+++ b/ranger/gui/widgets/filelist.py
@@ -121,6 +121,7 @@ class FileList(Widget):
 #
 			maxdirsize = self.settings.max_dirsize_for_autopreview
 			if not self.target.force_load and maxdirsize is not None \
+					and self.target.accessible \
 					and self.target.size > maxdirsize:
 				self.color(base_color, 'error')
 				self.win.addnstr(self.y, self.x, "no preview", self.wid)
diff --git a/ranger/gui/widgets/statusbar.py b/ranger/gui/widgets/statusbar.py
index f99882b1..b8b418c9 100644
--- a/ranger/gui/widgets/statusbar.py
+++ b/ranger/gui/widgets/statusbar.py
@@ -99,7 +99,7 @@ class StatusBar(Widget):
 		else:
 			target = self.env.at_level(0)
 
-		if not target.content_loaded:
+		if not target.content_loaded or not target.accessible:
 			return part
 
 		if self.filelist is not None:
-- 
cgit 1.4.1-2-gfad0