nvda

Navigating by line in Microsoft Edge is now up to 3x faster in the Windows 10 Creaters Update

#6994

Merged

Edge: split out pre gap removal code into its own TextInfo class and use it in Windows builds less 15048. Windows builds above this now can use the generic UI Automation textWithFields code. Along with the added caching, these changes provide up to a 3x speed-up in reading lines in Microsoft Edge.

Manually include precompiled UI Automation com interfaces.

UIA caching: make sure to cache UIA_IsEnabledPropertyId for control fields.

Address review actions.

UIA: fetching boundingRectangle via getCurrentPropertyValueEx rather than currentBoundingRectangle returns a tuple of left,top,width,height, rather than a specific rectangle object with members of left,top,right and bottom.

UIA NVDAObject: location property must return int coordinates, not float.

UIA NVDAObject: don't use any UIA constants at class level unless UIA support is enabled.

UI Automation client library cannot support properties added in a future version of Windows, either in cache requests, or provide defaults for them. Therefore: catch COMError when trhing to add properties to a controlFieldCacheRequest (E.g. sizeInSet on Windows 7), and also reintroduce try blocks around some of the property fetches in UIA NVDAObject's states property, much resembling what it used to be, though still using _getUIACacheablePropertyValue.

UIA NVDAObject's _getUIACacheablePropertyValue: remove the 'onlyCached' parameter as it is really not needed.