feat(SublimeText2.WebPackages): cache packages

EthanBrown.SublimeText2.WebPackages/tools/PackageCache/Emmet/emmet_completions/trackers.py

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+#!/usr/bin/env python
+#coding: utf8
+#################################### IMPORTS ###################################
+
+# Std Libs
+import re
+
+# Sublime Libs
+import sublime
+import sublime_plugin
+
+from collections import defaultdict
+
+################################### CONSTANTS ##################################
+
+# Directions for tracker
+BACK         =  -1
+FORWARD      =   1
+
+###################### VIEW TRACKERS ( CONTEXT SCANNERS ) ######################
+
+def pt_range(view, start_pt, direction):
+    end_pt = direction
+    if end_pt != -1: end_pt = view.size()
+    return xrange(start_pt, end_pt, direction)
+
+def region_from_pt_list(l):
+    if l:
+        l = sorted(l)
+        return sublime.Region(l[0], l[-1]+1)
+
+def view_tracker(view, start_pt, *conds):
+    pts = defaultdict(list)
+    failed = False
+
+    for i, (direction, condition) in enumerate(conds):
+        for pt in pt_range(view, start_pt, direction):
+            if failed: break
+
+            if not condition(view, pt):
+                if not pts[i]: failed = True
+                start_pt = pt
+                break
+
+            if len(pts[i]) < 2:
+                pts[i].append(pt)
+            else:
+                pts[i][-1] = pt
+
+    return [ region_from_pt_list(pt_list) for pt_list in pts.values() ]
+
+def tracker_success(regions):
+    return all(r is not None for r in regions)
+
+def back_track(view, start_pt, *conds):
+    return view_tracker(view, start_pt -1, *((BACK, c) for c in conds))
+
+################################### TRACKERS ###################################
+
+def track_regex(r, cond=True):
+    return lambda v, p: bool(re.match(r, v.substr(p))) is cond
+
+def track_scope(s, cond=True):
+    return lambda v, p: bool(v.match_selector(p, s)) is cond
+
+################################################################################