Implemented Branch/Rank objects in ranks.py

abx/abx_ui.py

@@ -41,7 +41,6 @@ from . import copy_anim
 from abx import ink_paint
 from . import render_profile
 
-
 #configfile = os.path.join(os.path.dirname(__file__), 'config.yaml')
 
 #print("Configuration file path: ", os.path.abspath(configfile))
@@ -223,6 +222,17 @@ class LunaticsSceneProperties(bpy.types.PropertyGroup):
     NOTE: due to be replaced by 'ProjectProperties', using the schema data
     retrieved by file_context.
     """
+    name_context_id = bpy.props.StringProperty(options={'HIDDEN', 'LIBRARY_EDITABLE'})
+    
+    @property
+    def name_context(self):
+        if self.name_context_id in BlendFile.name_contexts:
+            return BlendFile.name_contexts[self.name_context_id]
+        else:
+            name_context = BlendFile.new_name_context()
+            self.name_context_id = str(id(name_context))
+            return name_context
+    
     series_id = bpy.props.EnumProperty(
         items=[
             ('S1', 'S1', 'Series One'),

abx/file_context.py

@@ -1344,7 +1344,7 @@ class FileContext(NameContext):
             
         # Containers
         #self.notes = []
-        self.name_contexts = []
+        self.name_contexts = {}
                 
         # Status / Settings
         self.filepath = None
@@ -1637,6 +1637,9 @@ class FileContext(NameContext):
         namepath_segment = []                      
         ranks = [s.rank for s in self.schemas]        
         i_rank = len(self.namepath) 
+        if i_rank == 0:
+            old_rank = None       
+        else:
             old_rank = ranks[i_rank -1]
         
         # The new rank will be the highest rank mentioned, or the
@@ -1655,7 +1658,11 @@ class FileContext(NameContext):
                 if ranks.index(schema.rank) <= ranks.index(rank):
                     new_rank = schema.rank
                     
+        if old_rank:
             delta_rank = ranks.index(new_rank) - ranks.index(old_rank)
+        else:
+            # I think in this case, it's as if the old_rank number is -1?
+            delta_rank = ranks.index(new_rank) + 1
                 
         # Truncate to the new rank:
         namepath_segment = namepath_segment[:delta_rank]
@@ -1663,9 +1670,12 @@ class FileContext(NameContext):
         fields['rank'] = new_rank
         fields['code'] = namepath_segment[-1]
         
-        self.name_contexts.append(NameContext(self, fields,
+        name_context = NameContext(self, fields, 
-                namepath_segment=namepath_segment))
+                                   namepath_segment=namepath_segment)
-        return self.name_contexts[-1]
+        
+        self.name_contexts[str(id(name_context))] = name_context
+        
+        return name_context
     
 
 

abx/ranks.py

@@ -0,0 +1,247 @@
+# ranks.py
+"""
+Branches and ranks objects.
+
+Objects for representing the ranks of a hierarchy, with the 
+possibility of branching at nodes with redefined ranks via
+the 'project_schema' directives in project YAML files.
+"""
+
+import numbers
+
+class Branch(object):
+    """
+    Branch represents a ranking system in the tree of schemas.
+    
+    It takes the name of the project_unit where the ranking system
+    is overridden, and controls how all ranks defined within it
+    are interpreted.
+    """
+    def __init__(self, parent, code, start, ranks):
+        self.parent = parent
+        self.code = str(code)
+        self.start = int(start)
+        
+        self._ranks = RankList(self,[])
+        if parent:
+            for rank in parent.ranks:
+                if int(rank) < start:
+                    self._ranks.append(rank)
+            
+        for num, name in enumerate(ranks):
+            rank = Rank(self, num + start, name)
+            self._ranks.append(rank)
+            
+    def __repr__(self):
+        ranklist = ', '.join([str(r) for r in self.ranks[1:]])
+        if self.code:
+            code = self.code
+        else:
+            code = 'trunk'
+        return "<branch '%s': %s>" % (code, ranklist)
+    
+    def __contains__(self, other):
+        if isinstance(other, Rank) and other in self._ranks:
+            return True
+        else:
+            return False
+            
+    def rank(self, n):
+        """
+        Coerce int or string to rank, if it matches a rank in this Branch.
+        """
+        if isinstance(n, int) and 0 < n < len(self._ranks):
+            return self._ranks[n]
+        elif isinstance(n, str):
+            for rank in self._ranks:
+                if str(rank) == n:
+                    return rank
+        else:
+            raise TypeError
+            
+    @property
+    def ranks(self):
+        # Read-only property.
+        return self._ranks
+    
+
+            
+class Rank(object):
+    """
+    Ranks are named numbers indicating the position in a hierarchy.
+    
+    They can be incremented and decremented. The value 0 represents the top
+    rank, with increasing numbers indicating finer grades in taxonomic rank.
+    
+    They can have integers added to or subtracted from them, meaning to go
+    down or up in rank. They cannot be added to each other, though. Note that
+    higher and lower rank in the real world since of more or less scope is
+    inverted as a number -- the lower rank has a higher number.
+    
+    There are upper and lower bounds to rank, defined by the schema 'Branch'.
+    
+    Coercing a rank to an integer (int()) returns the numeric rank.
+    
+    Coercing a rank to a string (str()) returns the rank name.
+    
+    The representation includes the branch name and rank name.
+    
+    Ranks can be subtracted, returning an integer representing the difference
+    in rank.
+    """
+    def __init__(self, branch, num, name):
+        self.num = num
+        self.name = name
+        self.branch = branch
+        
+    def __index__(self):
+        return self.num
+        
+    def __int__(self):
+        return self.num
+    
+    def __str__(self):
+        return self.name
+    
+    def __repr__(self):
+        return '<%s:%d-%s>' % (self.branch.code, self.num, self.name)
+    
+    def __hash__(self):
+        return hash((self.branch, self.num, self.name))
+    
+    def __eq__(self, other):
+        if isinstance(other, Rank):
+            if hash(self) == hash(other):
+                return True
+            else:
+                return False
+        elif isinstance(other, str):
+            if other == self.name:
+                return True
+            else:
+                return False
+        elif isinstance(other, int):
+            if other == self.num:
+                return True
+            else:
+                return False
+        else:
+            return False
+        
+    def __gt__(self, other):
+        if isinstance(other, Rank):
+            if self.num > other.num:
+                return True
+            else:
+                return False
+        elif isinstance(other, int):
+            if self.num > other:
+                return True
+            else:
+                return False
+        else:
+            raise TypeError("Rank can't compare to %s" % type(other))
+        
+    def __lt__(self, other):
+        if isinstance(other, Rank):
+            if self.num < other.num:
+                return True
+            else:
+                return False
+        elif isinstance(other, int):
+            if self.num < other:
+                return True
+            else:
+                return False
+        else:
+            raise TypeError("Rank can't compare to %s" % type(other))
+        
+    def __ge__(self, other):
+        return (self > other or self == other)
+    
+    def __le__(self, other):
+        return (self < other or self == other)
+
+        
+    def __add__(self, other):
+        if isinstance(other, int):
+            if (self.num + other) < len(self.branch.ranks):
+                return self.branch.ranks[self.num+other]
+            elif (self.num + other) < 1:
+                return trunk
+            else:
+                return None
+        else:
+            raise TypeError("Changes in rank must be integers.")
+        
+    def __radd__(self, other):
+        return self.__add__(other)
+    
+    def __sub__(self, other):
+        if isinstance(other, Rank):
+            return (self.num - other.num)
+        elif isinstance(other, int):
+            if 0 < (self.num - other) < len(self.branch.ranks):
+                return self.branch.ranks[self.num-other]
+            elif (self.num - other) < 1:
+                return trunk
+            elif (self.num - other) > len(self.branch.ranks):
+                return None
+        else:
+            raise TypeError("Rank subtraction not defined for %s" % type(other))
+        
+    def __rsub__(self, other):
+        if isinstance(other, Rank):
+            return (other.num - self.num)
+        else:
+            raise TypeError("Rank subtraction not defined for %s" % type(other))
+
+
+class RankList(list):
+    """
+    Convenience wrapper for a list of ranks, with simplified look-up.
+    
+    This allows indexes and slices on the ranks to use Rank objects and/or
+    string names in addition to integers for accessing the elements of the
+    list.
+    
+    The RankList also has to know what branch it is indexing, so it includes
+    a 'branch' attribute.
+    """
+    def __init__(self, branch, ranks):
+        self.branch = branch
+        for rank in ranks:
+            self.append(rank)
+            
+    def __getitem__(self, rank):
+        if isinstance(rank, Rank):
+            i = int(rank)
+        elif isinstance(rank, str):
+            i = [r.name for r in self].index(rank)
+        elif isinstance(rank, int):
+            i = rank
+        elif isinstance(rank, slice):
+            if rank.start is None:
+                j = 0
+            else:
+                j = self.__getitem__(rank.start)
+                
+            if rank.stop is None:
+                k = len(self)
+            else:
+                k = self.__getitem__(rank.stop)
+                
+            s = []
+            for i in range(j,k):
+                s.append(super().__getitem__(i))
+                
+            return s
+        else:
+            raise IndexError("Type %s not a valid index for RankList" % type(rank))
+        return super().__getitem__(i)
+                    
+    
+# Define the trunk branch object
+# This schema will make sense for any unaffiliated Blender document,
+# even if it hasn't been saved as a file yet:
+trunk = Branch(None, '', 0, ('', 'file', 'scene'))

doc/Illus/ranks_branches.svg

@@ -0,0 +1,690 @@
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+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:600;font-stretch:normal;font-size:16px;line-height:1;font-family:'URW Gothic';-inkscape-font-specification:'URW Gothic Semi-Bold';letter-spacing:0px;word-spacing:0px"
+       x="814.9588"
+       y="330.56796"
+       id="text960"><tspan
+         sodipodi:role="line"
+         id="tspan958"
+         x="814.9588"
+         y="330.56796">Ranks:</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:600;font-stretch:normal;font-size:16px;line-height:1;font-family:'URW Gothic';-inkscape-font-specification:'URW Gothic Semi-Bold';letter-spacing:0px;word-spacing:0px"
+       x="812.7821"
+       y="126.22813"
+       id="text964"><tspan
+         sodipodi:role="line"
+         id="tspan962"
+         x="812.7821"
+         y="126.22813">Ranks:</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:600;font-stretch:normal;font-size:16px;line-height:1;font-family:'URW Gothic';-inkscape-font-specification:'URW Gothic Semi-Bold';letter-spacing:0px;word-spacing:0px"
+       x="1303.8707"
+       y="690.45233"
+       id="text989"><tspan
+         sodipodi:role="line"
+         id="tspan987"
+         x="1303.8707"
+         y="690.45233">Ranks:</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-style:oblique;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:13.3333px;line-height:1;font-family:'URW Gothic';-inkscape-font-specification:'URW Gothic Oblique';letter-spacing:0px;word-spacing:0px"
+       x="944.66821"
+       y="628.16779"
+       id="text993"><tspan
+         sodipodi:role="line"
+         x="944.66821"
+         y="628.16779"
+         id="tspan1006">At any level in the hierarchy, a project unit</tspan><tspan
+         sodipodi:role="line"
+         x="944.66821"
+         y="641.5011"
+         id="tspan1333">may define a new schema with a 'project_schema'</tspan><tspan
+         sodipodi:role="line"
+         x="944.66821"
+         y="654.83441"
+         id="tspan1335">key.</tspan><tspan
+         sodipodi:role="line"
+         x="944.66821"
+         y="668.16766"
+         id="tspan1337" /><tspan
+         sodipodi:role="line"
+         x="944.66821"
+         y="681.50098"
+         id="tspan1339">This key cannot change the interpretation of ranks</tspan><tspan
+         sodipodi:role="line"
+         x="944.66821"
+         y="694.83429"
+         id="tspan1341">above the current unit, but only the ones below it</tspan><tspan
+         sodipodi:role="line"
+         x="944.66821"
+         y="708.1676"
+         id="tspan1343">(and the current unit itself).</tspan><tspan
+         sodipodi:role="line"
+         x="944.66821"
+         y="721.50085"
+         id="tspan1349" /><tspan
+         sodipodi:role="line"
+         x="944.66821"
+         y="734.83417"
+         id="tspan1351">This creates a branch of the rank/schema</tspan><tspan
+         sodipodi:role="line"
+         x="944.66821"
+         y="748.16748"
+         id="tspan1353">tree, which takes the name of the project</tspan><tspan
+         sodipodi:role="line"
+         x="944.66821"
+         y="761.50079"
+         id="tspan1355">unit where the branch starts.</tspan><tspan
+         sodipodi:role="line"
+         x="944.66821"
+         y="774.83411"
+         id="tspan1345" /><tspan
+         sodipodi:role="line"
+         x="944.66821"
+         y="788.16736"
+         id="tspan1347">(And the first unit that is not inherited from</tspan><tspan
+         sodipodi:role="line"
+         x="944.66821"
+         y="801.50067"
+         id="tspan1365">its parent Branch).</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:21.3333px;line-height:1;font-family:'Courier New';-inkscape-font-specification:'Courier New Bold';letter-spacing:0px;word-spacing:0px"
+       x="121.5862"
+       y="665.03693"
+       id="text911"><tspan
+         sodipodi:role="line"
+         id="tspan909"
+         x="121.5862"
+         y="665.03693">episodes.yaml</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:16px;line-height:1;font-family:'Courier New';-inkscape-font-specification:'Courier New';letter-spacing:0px;word-spacing:0px"
+       x="189.16733"
+       y="684.3067"
+       id="text915"><tspan
+         sodipodi:role="line"
+         x="189.16733"
+         y="684.3067"
+         id="tspan917">project_unit:</tspan><tspan
+         sodipodi:role="line"
+         x="189.16733"
+         y="700.3067"
+         id="tspan924">    from_folders: True</tspan><tspan
+         sodipodi:role="line"
+         x="189.16733"
+         y="716.3067"
+         id="tspan926" /></text>
+    <text
+       xml:space="preserve"
+       style="font-style:oblique;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:13.3333px;line-height:1;font-family:'URW Gothic';-inkscape-font-specification:'URW Gothic Oblique';letter-spacing:0px;word-spacing:0px"
+       x="449.34958"
+       y="629.32965"
+       id="text944"><tspan
+         sodipodi:role="line"
+         x="449.34958"
+         y="629.32965"
+         id="tspan951">The Episodes directory is not</tspan><tspan
+         sodipodi:role="line"
+         x="449.34958"
+         y="642.66296"
+         id="tspan1028">a unit, but each of the folders under it is (they</tspan><tspan
+         sodipodi:role="line"
+         x="449.34958"
+         y="655.99628"
+         id="tspan1541">are 'series' units, all sharing the same 'series' rank</tspan><tspan
+         sodipodi:role="line"
+         x="449.34958"
+         y="669.32953"
+         id="tspan1547">in the 'myproject' branch.</tspan><tspan
+         sodipodi:role="line"
+         x="449.34958"
+         y="682.66284"
+         id="tspan1559" /><tspan
+         sodipodi:role="line"
+         x="449.34958"
+         y="695.99615"
+         id="tspan1551">Rather than using a separate YAML files for each</tspan><tspan
+         sodipodi:role="line"
+         x="449.34958"
+         y="709.32947"
+         id="tspan1567">series, this sample project uses a single file at the</tspan><tspan
+         sodipodi:role="line"
+         x="449.34958"
+         y="722.66272"
+         id="tspan1569">top with 'project_unit' key that is used as a template.</tspan><tspan
+         sodipodi:role="line"
+         x="449.34958"
+         y="735.99603"
+         id="tspan1571" /><tspan
+         sodipodi:role="line"
+         x="449.34958"
+         y="749.32935"
+         id="tspan1573">It is distinguished from a normal 'project_unit' key</tspan><tspan
+         sodipodi:role="line"
+         x="449.34958"
+         y="762.66266"
+         id="tspan1575">by providing the 'from_folders' setting, and not</tspan><tspan
+         sodipodi:role="line"
+         x="449.34958"
+         y="775.99597"
+         id="tspan1577">containing a 'code', 'name', or 'title' setting.</tspan><tspan
+         sodipodi:role="line"
+         x="449.34958"
+         y="789.32922"
+         id="tspan1579" /><tspan
+         sodipodi:role="line"
+         x="449.34958"
+         y="802.66254"
+         id="tspan1581">Instead, these values will be set by the directory names</tspan><tspan
+         sodipodi:role="line"
+         x="449.34958"
+         y="815.99585"
+         id="tspan1583">under the current directory (this also means all directories</tspan><tspan
+         sodipodi:role="line"
+         x="449.34958"
+         y="829.32916"
+         id="tspan1585">must be project units at this level).</tspan><tspan
+         sodipodi:role="line"
+         x="449.34958"
+         y="842.66248"
+         id="tspan1587" /><tspan
+         sodipodi:role="line"
+         x="449.34958"
+         y="855.99573"
+         id="tspan1589">This allows for a simple fanout without needing lots of YAML files.</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-style:oblique;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:13.3333px;line-height:1;font-family:'URW Gothic';-inkscape-font-specification:'URW Gothic Oblique';letter-spacing:0px;word-spacing:0px"
+       x="1029.5554"
+       y="261.4942"
+       id="text969"><tspan
+         sodipodi:role="line"
+         x="1029.5554"
+         y="261.4942"
+         id="tspan1135">The project folder defines a schema in a YAML file matching the project directory name.</tspan><tspan
+         sodipodi:role="line"
+         x="1029.5554"
+         y="274.82751"
+         id="tspan1139">(you can also call the file 'project.yaml' or 'kitcat.yaml' if you prefer).</tspan><tspan
+         sodipodi:role="line"
+         x="1029.5554"
+         y="288.1608"
+         id="tspan1159" /><tspan
+         sodipodi:role="line"
+         x="1029.5554"
+         y="301.49411"
+         id="tspan1161">Three keys are mandatory for this file:</tspan><tspan
+         sodipodi:role="line"
+         x="1029.5554"
+         y="314.82739"
+         id="tspan1163" /><tspan
+         sodipodi:role="line"
+         x="1029.5554"
+         y="328.16071"
+         id="tspan1165">project_root:</tspan><tspan
+         sodipodi:role="line"
+         x="1029.5554"
+         y="341.49399"
+         id="tspan1169">     The 'project_root' key only has to exist. It can be as simple as having</tspan><tspan
+         sodipodi:role="line"
+         x="1029.5554"
+         y="354.8273"
+         id="tspan1173">     a value of True. But this is an ideal place to store basic metadata about</tspan><tspan
+         sodipodi:role="line"
+         x="1029.5554"
+         y="368.16058"
+         id="tspan1177">     your organization and this project.</tspan><tspan
+         sodipodi:role="line"
+         x="1029.5554"
+         y="381.4939"
+         id="tspan1179" /><tspan
+         sodipodi:role="line"
+         x="1029.5554"
+         y="394.82721"
+         id="tspan1181">project_unit:</tspan><tspan
+         sodipodi:role="line"
+         x="1029.5554"
+         y="408.16049"
+         id="tspan1183">     The 'project_unit' key identifies the top rank of the project (the current directory). It</tspan><tspan
+         sodipodi:role="line"
+         x="1029.5554"
+         y="421.4938"
+         id="tspan1187">     should contain a bullet list with a single entry identifying the code ('myproject'), 'name',</tspan><tspan
+         sodipodi:role="line"
+         x="1029.5554"
+         y="434.82709"
+         id="tspan1191">     'title', and other details.</tspan><tspan
+         sodipodi:role="line"
+         x="1029.5554"
+         y="448.1604"
+         id="tspan1193" /><tspan
+         sodipodi:role="line"
+         x="1029.5554"
+         y="461.49368"
+         id="tspan1195">project_schema:</tspan><tspan
+         sodipodi:role="line"
+         x="1029.5554"
+         y="474.827"
+         id="tspan1143">      The 'project_schema' key defines the default hierarchy of project assets, and</tspan><tspan
+         sodipodi:role="line"
+         x="1029.5554"
+         y="488.16031"
+         id="tspan1553">      creates the 'myproject' branch of ranks, overriding the default &quot;trunk&quot; branch.</tspan><tspan
+         sodipodi:role="line"
+         x="1029.5554"
+         y="501.49359"
+         id="tspan1555">      All project files are of rank 'project' or below (with each having a higher rank</tspan><tspan
+         sodipodi:role="line"
+         x="1029.5554"
+         y="514.8269"
+         id="tspan1557">      number). As defined here, the default ranking is organized for episode shot files.</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-style:oblique;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:13.3333px;line-height:1;font-family:'URW Gothic';-inkscape-font-specification:'URW Gothic Oblique';letter-spacing:0px;word-spacing:0px"
+       x="515.06158"
+       y="63.621597"
+       id="text1038"><tspan
+         sodipodi:role="line"
+         x="515.06158"
+         y="63.621597"
+         id="tspan1036">Before any file is loaded (filepath is ''),</tspan><tspan
+         sodipodi:role="line"
+         x="515.06158"
+         y="76.954895"
+         id="tspan1045">the rank hierarchy is controlled solely</tspan><tspan
+         sodipodi:role="line"
+         x="515.06158"
+         y="90.288193"
+         id="tspan1047">by the default schema in the ABX</tspan><tspan
+         sodipodi:role="line"
+         x="515.06158"
+         y="103.62149"
+         id="tspan1049">program folder.</tspan><tspan
+         sodipodi:role="line"
+         x="515.06158"
+         y="116.95479"
+         id="tspan1051" /><tspan
+         sodipodi:role="line"
+         x="515.06158"
+         y="130.2881"
+         id="tspan1053">It sets only the 'trunk' (rank 0),</tspan><tspan
+         sodipodi:role="line"
+         x="515.06158"
+         y="143.6214"
+         id="tspan1055">'file' (the level of the Blender file)</tspan><tspan
+         sodipodi:role="line"
+         x="515.06158"
+         y="156.9547"
+         id="tspan1057">and 'scene' (the level of a scene</tspan><tspan
+         sodipodi:role="line"
+         x="515.06158"
+         y="170.28799"
+         id="tspan1059">in thefile) as ranks.</tspan><tspan
+         sodipodi:role="line"
+         x="515.06158"
+         y="183.62129"
+         id="tspan1061" /><tspan
+         sodipodi:role="line"
+         x="515.06158"
+         y="196.95459"
+         id="tspan1063">These are imposed by the nature of</tspan><tspan
+         sodipodi:role="line"
+         x="515.06158"
+         y="210.28789"
+         id="tspan1065">the program, so we can safely use</tspan><tspan
+         sodipodi:role="line"
+         x="515.06158"
+         y="223.62119"
+         id="tspan1067">those as defaults.</tspan><tspan
+         sodipodi:role="line"
+         x="515.06158"
+         y="236.95448"
+         id="tspan1069" /><tspan
+         sodipodi:role="line"
+         x="515.06158"
+         y="250.2878"
+         id="tspan1071">Any additional structure needs to be</tspan><tspan
+         sodipodi:role="line"
+         x="515.06158"
+         y="263.62109"
+         id="tspan1073">given by a YAML file in the project</tspan><tspan
+         sodipodi:role="line"
+         x="515.06158"
+         y="276.95438"
+         id="tspan1075">directory.</tspan></text>
+    <path
+       style="fill:none;stroke:#000000;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       d="m 889.51282,213.88591 0,27.1624"
+       id="path1077"
+       sodipodi:nodetypes="cc" />
+    <text
+       xml:space="preserve"
+       style="font-style:oblique;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:13.3333px;line-height:1;font-family:'URW Gothic';-inkscape-font-specification:'URW Gothic Oblique';letter-spacing:0px;word-spacing:0px"
+       x="119.42168"
+       y="924.96472"
+       id="text1085"><tspan
+         sodipodi:role="line"
+         x="119.42168"
+         y="924.96472"
+         id="tspan1083">The name path for this file is derived almost</tspan><tspan
+         sodipodi:role="line"
+         x="119.42168"
+         y="938.29803"
+         id="tspan1092">entirely from the filename. Only the 'project'</tspan><tspan
+         sodipodi:role="line"
+         x="119.42168"
+         y="951.63135"
+         id="tspan1094">and 'series' ranks are specified above.</tspan><tspan
+         sodipodi:role="line"
+         x="119.42168"
+         y="964.9646"
+         id="tspan1108" /><tspan
+         sodipodi:role="line"
+         x="119.42168"
+         y="978.29791"
+         id="tspan1110">ABX currently ignores the folder names above</tspan><tspan
+         sodipodi:role="line"
+         x="119.42168"
+         y="991.63123"
+         id="tspan1112">this, even though they could be used to give</tspan><tspan
+         sodipodi:role="line"
+         x="119.42168"
+         y="1004.9645"
+         id="tspan1114">more information (e.g. this sequence is called</tspan><tspan
+         sodipodi:role="line"
+         x="119.42168"
+         y="1018.2978"
+         id="tspan1116">&quot;LastPoint&quot;, but without YAML, this is left unspecified.</tspan></text>
+    <path
+       style="fill:none;stroke:#000000;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       d="M 130.76843,682.08859 V 716.8141"
+       id="path1118" />
+    <path
+       style="fill:none;stroke:#000000;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       d="m 889.8041,553.82368 0,18.17606 H 136.617 v 32.46778"
+       id="path1120"
+       sodipodi:nodetypes="cccc" />
+    <path
+       style="fill:none;stroke:#000000;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       d="m 889.8041,553.82368 0,18.17606 h 421.5589 v 32.46778"
+       id="path1122"
+       sodipodi:nodetypes="cccc" />
+    <path
+       style="fill:none;stroke:#000000;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       d="M 1312.781,834.80279 V 869.5283"
+       id="path1124" />
+  </g>
+</svg>

tests/test_ranks.py

@@ -0,0 +1,159 @@
+# test_ranks
+"""
+Test the ranks module, which implements the branch and rank semantics and math.
+"""
+import unittest, os
+
+import sys
+print("__file__ = ", __file__)
+sys.path.append(os.path.normpath(os.path.join(__file__, '..', '..')))
+
+from abx import ranks
+
+class BranchTests(unittest.TestCase):
+    def test_trunk_branch(self):
+        t = ranks.trunk.rank('')
+        f = ranks.trunk.rank('file')
+        s = ranks.trunk.rank('scene')
+        self.assertEqual(repr(ranks.trunk), "<branch 'trunk': file, scene>")
+        self.assertIn(t, ranks.trunk)
+        self.assertIn(f, ranks.trunk)
+        self.assertIn(s, ranks.trunk)
+        
+    
+    def test_defining_branch(self):
+        b = ranks.Branch(ranks.trunk, 'myproject', 1,
+            ('project', 'series', 'episode', 'sequence',
+             'block', 'shot', 'element'))
+        
+        self.assertEqual(len(b._ranks), 8)
+
+class RanksTests(unittest.TestCase):
+    def setUp(self):
+        self.b = ranks.Branch(ranks.trunk, 'myproject', 1,
+            ('project', 'series', 'episode', 'sequence',
+             'block', 'shot', 'element'))
+        
+    def test_rank_knows_branch(self):
+        sh = self.b.rank('shot')
+        self.assertIs(sh.branch, self.b)
+        self.assertEqual(sh.num, 6)
+        
+    def test_rank_representation(self):
+        ep = self.b.rank('episode')
+        self.assertEqual(repr(ep), '<myproject:3-episode>')
+        self.assertEqual(int(ep), 3)
+        self.assertEqual(str(ep), 'episode')
+        
+        sq = self.b.rank(4)
+        self.assertEqual(repr(sq), '<myproject:4-sequence>')
+        self.assertEqual(int(sq), 4)
+        self.assertEqual(str(sq), 'sequence')
+        
+    def test_rank_addition(self):
+        ep = self.b.rank('episode')
+        sq = self.b.rank(4)
+        
+        self.assertEqual(sq, ep + 1)
+        self.assertEqual(sq, 1 + ep)
+        
+    def test_rank_subtraction(self):
+        ep = self.b.rank('episode')
+        sq = self.b.rank(4)
+        
+        self.assertEqual(ep, sq - 1)
+        self.assertEqual(sq, ep - (-1))
+        self.assertEqual(sq - ep, 1)
+        self.assertEqual(ep - sq, -1)
+        
+    def test_rank_increment_decrement(self):
+        ep = self.b.rank('episode')
+        sq = self.b.rank(4)
+        
+        r = ep
+        r += 1
+        self.assertEqual(r, sq)
+        
+        r = sq
+        r -= 1
+        self.assertEqual(r, ep)
+        
+    def test_rank_comparisons_direct(self):
+        sh = self.b.rank('shot')
+        se = self.b.rank('series')
+        s1 = self.b.rank(2)
+        
+        self.assertEqual(se, s1)
+        self.assertGreater(sh, se)
+        self.assertLess(se, sh)
+    
+    def test_rank_comparisons_compound(self):
+        sh = self.b.rank('shot')
+        se = self.b.rank('series')
+        s1 = self.b.rank(2)
+        
+        self.assertNotEqual(sh, se)
+        self.assertGreaterEqual(sh, se)
+        self.assertLessEqual(se, sh)
+        self.assertLessEqual(s1, se)
+        self.assertGreaterEqual(se, s1)
+    
+    def test_rank_too_high(self):
+        sh = self.b.rank('shot')
+        el = self.b.rank('element')
+        
+        r = sh + 1
+        s = sh + 2
+        t = sh + 3
+        
+        self.assertEqual(r, el)
+        self.assertEqual(s, None)
+        self.assertEqual(t, None)
+        
+    def test_rank_too_low(self):
+        se = self.b.rank('series')
+        pr = self.b.rank('project')
+        
+        r = se - 1  # Normal - 'project' is one below 'series'
+        s = se - 2  # ? Should this be 'project' or 'trunk'/None?
+        t = se - 3  #      "`            "
+        
+        self.assertEqual(r, pr)
+        self.assertEqual(s, ranks.trunk)
+        self.assertEqual(t, ranks.trunk)
+        
+    
+    def test_rank_slices_from_branch(self):
+        ranks = self.b.ranks
+        self.assertEqual(
+            ranks[1:4],
+            ranks[self.b.rank('project'):self.b.rank('sequence')])
+
+        self.assertEqual(
+            ranks[:],
+            ranks)
+        
+    def test_ranklist_slice_access(self):
+        ranks = self.b.ranks
+        
+        self.assertEqual(
+            ranks[1:4],
+            ranks['project':'sequence'])
+        
+        self.assertEqual(
+            ranks[:'sequence'],
+            ranks[0:4])
+        
+        self.assertEqual(
+            ranks[1:'shot'],
+            ranks['project':6])
+        
+        self.assertEqual(
+            ranks[self.b.ranks['sequence']:7],
+            ranks['sequence':7])
+        
+        self.assertEqual(
+            ranks.branch,
+            self.b)
+
+