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VideoRenderer

moss_core::resolve::embed_renderer

Struct VideoRenderer 

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pub struct VideoRenderer;
Expand description

Renderer for video embeds: ![[clip.mp4]] → <video src="..." controls>.

|WxH becomes width/height attrs. preload=metadata so the browser fetches duration/dimensions but not the full payload until play.

Output form: single src= attribute on <video> (no <source> child), no type= attribute. Two coupled reasons:

  1. type= would go stale. The downstream rewriter src-tauri/src/build/media/placeholder.rs::add_video_placeholder_attributes rewrites the src extension from .mov to .mp4 after the renderer runs (moss converts .mov source files to .mp4 during build, so a raw .mov reference would 404). Any explicit type="video/quicktime" emitted here would survive the rewrite as a lie. Browser sniffing from the rewritten URL extension is more reliable than a stale type hint.

  2. The rewriter regex requires single-src= form. It matches <video\s+[^>]*?src="..."> — src= must be on the <video> tag itself, not on a nested <source> child. With nested <source>, the regex no-ops and the .mov→.mp4 rewrite + data-placeholder-src

    • poster + data-thumb-src injection all silently drop. This constraint is load-bearing; see #592 for an integration test that pins it across the cross-crate boundary, and #593 for the audio asymmetry. This shape also matches the historical moss output that liu-guo.com still ships.

Note: .mov is codec-dependent at the source. Safari plays QuickTime natively; Chrome/Firefox accept the MIME but decode only if the container’s video codec is supported (usually H.264). The .mov→.mp4 rewriter solves this in practice — served files end as .mp4.

Trait Implementations§

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impl Debug for VideoRenderer

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl EmbedRenderer for VideoRenderer

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fn extensions(&self) -> &[&'static str]

Extensions this renderer claims (lowercase, without leading dot).
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fn render(&self, embed: &ParsedEmbed<'_>) -> RenderedEmbed

Render the embed. Must be pure; moss-core is I/O-free.
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fn head_assets(&self) -> &[&'static str]

Page-level HTML fragments this renderer needs in <head>, injected once per page that contains at least one embed from this renderer. Read more

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impl<T> Any for T
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fn borrow_mut(&mut self) -> &mut T

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