nvda

fa768843 - Build a caching framework into the UIA NVDAObject class so as to allow for instantiating a UIA NVDAObject with a UIAElement containing prefetched UI Automation property values via a UI Automation CacheRequest, available for the remainder of the core cycle the NVDAObject was instantiated in. This is useful when instantiating an NVDAObject purely to generate a control field, where the caller knows what properties are needed.

Build a caching framework into the UIA NVDAObject class so as to allow for instantiating a UIA NVDAObject with a UIAElement containing prefetched UI Automation property values via a UI Automation CacheRequest, available for the remainder of the core cycle the NVDAObject was instantiated in. This is useful when instantiating an NVDAObject purely to generate a control field, where the caller knows what properties are needed. All code within UIA NVDAObject and its subclasses should use the new _getUIACacheablePropertyValue method to fetch UI Automation properties as this will check the cache first. Make use of the new Win 10 RS2 bulk-fetch UIA APIs available on IUIAutomationTextRange3 such as getChildrenBuildCache, getEnclosingElementBuildCache and getAttributeValues. When not available, compatibility code falls back to the older APIs, providing the same cached results, but over multiple calls. UIATextInfo._getTextWithFieldsForUIARange and related content fetching code has been updated to use cacheRequests where possible. E.g. getChildrenBuildCache, getEnclosingElementBuildCache etc.