[orca] Add utilities for identifying inline list items

[Joanmarie Diggs <joanied src gnome org>]

commit b471e7a1800fd59278a45a25ec96904d27db3836
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Fri Feb 8 12:47:19 2019 -0500

    Add utilities for identifying inline list items

 src/orca/scripts/web/script_utilities.py | 60 ++++++++++++++++++++++++++++++++
 1 file changed, 60 insertions(+)
---
diff --git a/src/orca/scripts/web/script_utilities.py b/src/orca/scripts/web/script_utilities.py
index 1d5da8fa6..07fad4611 100644
--- a/src/orca/scripts/web/script_utilities.py
+++ b/src/orca/scripts/web/script_utilities.py
@@ -73,11 +73,14 @@ class Utilities(script_utilities.Utilities):
         self._hasLongDesc = {}
         self._hasUselessCanvasDescendant = {}
         self._id = {}
+        self._displayStyle = {}
         self._isClickableElement = {}
         self._isAnchor = {}
         self._isEditableComboBox = {}
         self._isEditableDescendantOfComboBox = {}
         self._isErrorMessage = {}
+        self._isInlineListItem = {}
+        self._isInlineListDescendant = {}
         self._isLandmark = {}
         self._isLiveRegion = {}
         self._isLink = {}
@@ -140,11 +143,14 @@ class Utilities(script_utilities.Utilities):
         self._hasLongDesc = {}
         self._hasUselessCanvasDescendant = {}
         self._id = {}
+        self._displayStyle = {}
         self._isClickableElement = {}
         self._isAnchor = {}
         self._isEditableComboBox = {}
         self._isEditableDescendantOfComboBox = {}
         self._isErrorMessage = {}
+        self._isInlineListItem = {}
+        self._isInlineListDescendant = {}
         self._isLandmark = {}
         self._isLiveRegion = {}
         self._isLink = {}
@@ -534,6 +540,19 @@ class Utilities(script_utilities.Utilities):
         self._id[hash(obj)] = rv
         return rv
 
+    def _getDisplayStyle(self, obj):
+        if hash(obj) in self._displayStyle:
+            return self._displayStyle.get(hash(obj))
+
+        try:
+            attrs = dict([attr.split(':', 1) for attr in obj.getAttributes()])
+        except:
+            return None
+
+        rv = attrs.get('display')
+        self._displayStyle[hash(obj)] = rv
+        return rv
+
     def _getTag(self, obj):
         rv = self._tag.get(hash(obj))
         if rv is not None:
@@ -2746,6 +2765,47 @@ class Utilities(script_utilities.Utilities):
         self._isErrorMessage[hash(obj)] = rv
         return rv
 
+    def isInlineListItem(self, obj):
+        if not (obj and self.inDocumentContent(obj)):
+            return False
+
+        rv = self._isInlineListItem.get(hash(obj))
+        if rv is not None:
+            return rv
+
+        if obj.getRole() != pyatspi.ROLE_LIST_ITEM:
+            rv = False
+        else:
+            displayStyle = self._getDisplayStyle(obj)
+            rv = displayStyle and "inline" in displayStyle
+
+        self._isInlineListItem[hash(obj)] = rv
+        return rv
+
+    def isInlineListDescendant(self, obj):
+        if not (obj and self.inDocumentContent(obj)):
+            return False
+
+        rv = self._isInlineListDescendant.get(hash(obj))
+        if rv is not None:
+            return rv
+
+        if self.isInlineListItem(obj):
+            rv = True
+        else:
+            ancestor = pyatspi.findAncestor(obj, self.isInlineListItem)
+            rv = ancestor is not None
+
+        self._isInlineListDescendant[hash(obj)] = rv
+        return rv
+
+    def listForInlineListDescendant(self, obj):
+        if not self.isInlineListDescendant(obj):
+            return None
+
+        isList = lambda x: x and x.getRole() == pyatspi.ROLE_LIST
+        return pyatspi.findAncestor(obj, isList)
+
     def isFeed(self, obj):
         return 'feed' in self._getXMLRoles(obj)