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Make it possible to build the style_traits crate with a stable compiler.
Testing this on CI to make sure we don’t regress it is blocked on #11806
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20 changed files with 145 additions and 89 deletions
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@ -23,7 +23,7 @@ use std::i32;
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///
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/// The ratio between ScreenPx and DevicePixel for a given display be found by calling
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/// `servo::windowing::WindowMethods::hidpi_factor`.
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#[derive(Clone, Copy, Debug, HeapSizeOf)]
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#[derive(Clone, Copy, Debug)]
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pub enum ScreenPx {}
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/// One CSS "px" in the coordinate system of the "initial viewport":
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@ -35,7 +35,7 @@ pub enum ScreenPx {}
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///
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/// At the default zoom level of 100%, one PagePx is equal to one ScreenPx. However, if the
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/// document is zoomed in or out then this scale may be larger or smaller.
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#[derive(Clone, Copy, Debug, HeapSizeOf)]
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#[derive(Clone, Copy, Debug)]
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pub enum ViewportPx {}
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/// One CSS "px" in the root coordinate system for the content document.
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@ -44,9 +44,11 @@ pub enum ViewportPx {}
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/// This is the mobile-style "pinch zoom" that enlarges content without reflowing it. When the
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/// viewport zoom is not equal to 1.0, then the layout viewport is no longer the same physical size
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/// as the viewable area.
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#[derive(Clone, Copy, Debug, HeapSizeOf)]
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#[derive(Clone, Copy, Debug)]
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pub enum PagePx {}
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known_heap_size!(0, ScreenPx, ViewportPx, PagePx);
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// In summary, the hierarchy of pixel units and the factors to convert from one to the next:
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//
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// DevicePixel
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