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style: Only apply grayscale filter for printing on print preview.
Differential Revision: https://phabricator.services.mozilla.com/D88065
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parent
16e0fd3e1f
commit
35716fd514
2 changed files with 28 additions and 1 deletions
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@ -521,6 +521,18 @@ fn eval_moz_is_glyph(
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query_value.map_or(is_glyph, |v| v == is_glyph)
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}
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fn eval_moz_print_preview(
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device: &Device,
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query_value: Option<bool>,
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_: Option<RangeOrOperator>,
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) -> bool {
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let is_print_preview = device.is_print_preview();
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if is_print_preview {
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debug_assert_eq!(device.media_type(), MediaType::print());
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}
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query_value.map_or(is_print_preview, |v| v == is_print_preview)
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}
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fn eval_moz_is_resource_document(
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device: &Device,
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query_value: Option<bool>,
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@ -601,7 +613,7 @@ macro_rules! system_metric_feature {
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/// to support new types in these entries and (2) ensuring that either
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/// nsPresContext::MediaFeatureValuesChanged is called when the value that
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/// would be returned by the evaluator function could change.
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pub static MEDIA_FEATURES: [MediaFeatureDescription; 55] = [
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pub static MEDIA_FEATURES: [MediaFeatureDescription; 56] = [
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feature!(
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atom!("width"),
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AllowsRanges::Yes,
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@ -799,6 +811,12 @@ pub static MEDIA_FEATURES: [MediaFeatureDescription; 55] = [
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Evaluator::Ident(eval_moz_os_version),
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ParsingRequirements::CHROME_AND_UA_ONLY,
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),
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feature!(
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atom!("-moz-print-preview"),
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AllowsRanges::No,
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Evaluator::BoolInteger(eval_moz_print_preview),
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ParsingRequirements::CHROME_AND_UA_ONLY,
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),
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system_metric_feature!(atom!("-moz-scrollbar-start-backward")),
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system_metric_feature!(atom!("-moz-scrollbar-start-forward")),
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system_metric_feature!(atom!("-moz-scrollbar-end-backward")),
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@ -206,6 +206,15 @@ impl Device {
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self.reset_computed_values();
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}
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/// Returns whether this document is in print preview.
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pub fn is_print_preview(&self) -> bool {
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let pc = match self.pres_context() {
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Some(pc) => pc,
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None => return false,
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};
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pc.mType == structs::nsPresContext_nsPresContextType_eContext_PrintPreview
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}
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/// Returns the current media type of the device.
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pub fn media_type(&self) -> MediaType {
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let pc = match self.pres_context() {
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