Additional Scroll/Spread mode clean-up (PR 9832 follow-up)#9858

Merged

timvandermeij merged 8 commits intomozilla:masterfrom Snuffleupagus:scrollMode-refactor

Jun 30, 2018

+187-127

Commits on Jun 30, 2018

Remove the unused PDFViewerApplication.documentFingerprint property
Snuffleupagus
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Add scrollModeOnLoad/spreadModeOnLoad default values to AppOptions
Snuffleupagus
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Allow the scrollModeOnLoad/spreadModeOnLoad Preferences to override ViewHistory settings
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Change the scrollMode/spreadMode to "private" properties on BaseViewer instances
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Replace setScrollMode/setSpreadMode methods with getters/setters
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Re-factor updating of Scroll/Spread modes, and place all the code in BaseViewer with overrides (as necessary) in the extending classes
Snuffleupagus
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For consistency with other viewer state, remove and deprecate setting Scroll/Spread modes in the BaseViewer constructor
Snuffleupagus
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Ensure that Scroll/Spread mode buttons are correctly reset, when the document is closed
Snuffleupagus
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