Improve ImageLoader thumbnail fallbacks and refactor GetThumbnailResult#4453

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DavidGBrett merged 18 commits into

devfrom

improve-icon-handling

Jun 7, 2026

Commits on May 23, 2026

Fallback to ExtractAssociatedIcon if GetThumbnail fails on non image/svg files
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Extract bitmap image loading logic to a reusable method
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Rename LoadFullImage to LoadBitmapImageScaleToFitWithin and add max size parameter
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Fallback to loading the bitmap image at small size if GetThumbnail fails
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Fallback to default folder icon if GetThumbnail fails on folders
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Refactor GetThumbnailResult by extracting branch cases into helper methods
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Consistently use MissingImage instead of generic Image for missing thumbnail icon
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Make directory fallback to folder icon also modify path to it
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Remove unused ImageIcon constant
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Fix bitmap image scaling to fit logic
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Refactor ImageLoader to remove path mutation side effects
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Add and use TryGetBitmapImageDimensionsFromMetadata to avoid unnecessary image decoding when checking if resizing is required
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Use better Log levels and improve messages in ImageLoader
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Make GetDirectoryThumbnailResult take loadFullImage flag like the other thumbnail handlers
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Replace ExtractAssociatedIconOrNull with TryExtractAssociatedIcon
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Add ThumbnailLoader delegate for GetThumbnail testability
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Add test suite for ImageLoader
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Rename GetThumbnail to GetShellThumbnail and the same to derived variables and fields
DavidGBrett
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