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David Richardson
5a1845957e
* CPItemProvider.j: Introduce CPItemProvider, modelled on NSItemProvider. - Register data representations keyed by MIME type, with wildcard matching. - Load representations asynchronously, completing inside a run loop pass. - Read browser File objects with FileReader. - Document remaining NSItemProvider compatibility gaps via TODO comments. * Foundation.j: Import CPItemProvider.j. * CPPlatformFilePanel.j: Introduce the DOM platform class that runs the browser's file dialog through a hidden file input. * CPOpenPanel.j: Replace the NativeHost implementation with a browser implementation. - Implement -beginWithCompletionHandler: and -beginSheetModalForWindow:completionHandler:. - Add allowed file types, message, prompt, and an accessory view behind an Options button. - Validate chosen files through the window delegate's panel:validateURL:error:. - Add -itemProviders, and -URLs holding file names. - Raise an exception from -runModal. - Document remaining NSOpenPanel compatibility gaps via TODO comments. * CPTextView.j: Insert images through CPOpenPanel and CPItemProvider, for both -insertImage: and paste. * CPItemProviderTest.j, CPOpenPanelTest.j: Add unit tests covering registration, loading, type matching, panel results, and cancelled runs.