Module adapters/office

Microsoft Office adapter for MAIDR: PowerPoint and Word.

Reads the charts of a PowerPoint presentation or a Word document -- which Office.js has no API for -- from the file itself, and mounts MAIDR's accessible layer for them in an Office add-in's task pane: audio sonification, text descriptions, braille output and keyboard navigation. A chart is read from the values Office cached in it, into the snapshot the Excel adapter converts, so every chart type the Excel adapter reads is read here too.

• bindOffice is what an add-in for all three applications calls, once, from Office.onReady: Excel's pane, or PowerPoint's, or Word's.
• bindPowerPoint and bindWord mount one application's pane.
• readPowerPointCharts and readWordCharts are the reads underneath, and readChartPart and readChartExPart read one chart part, for a pane that mounts MAIDR itself.