css 0.0.22

A crate that uses the cssparser and selectors crates to provide a domain model for CSS Stylesheets. Intended to allow effective minification of CSS and CSS transformations such as autoprefixing and removal by other crates
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// This file is part of css. It is subject to the license terms in the COPYRIGHT file found in the top-level directory of this distribution and at https://raw.githubusercontent.com/lemonrock/css/master/COPYRIGHT. No part of predicator, including this file, may be copied, modified, propagated, or distributed except according to the terms contained in the COPYRIGHT file.
// Copyright © 2017 The developers of css. See the COPYRIGHT file in the top-level directory of this distribution and at https://raw.githubusercontent.com/lemonrock/css/master/COPYRIGHT.


#[derive(Default, Debug, Clone)]
pub struct SimplisticExampleOfConversion<U: Unit>
{
	// Font relative lengths
	pub em: U::Number,
	pub ex: U::Number,
	pub ch: U::Number,
	pub rem: U::Number,
	
	// Viewport percentage lengths
	pub vw: U::Number,
	pub vh: U::Number,
	pub vmin: U::Number,
	pub vmax: U::Number,
	
	// Percent conversion
	pub one_hundred_percent_in_absolute_units: U::Number,
	
	// Simplistic approach
	pub cssVariablesWithLowerCaseNamesWithoutLeadingDoubleDashToRawCss: HashMap<String, String>,
	pub attributesWithLowerCaseNames: HashMap<String, String>,
}

impl<U: Unit> FontRelativeLengthConversion<U::Number> for SimplisticExampleOfConversion<U>
{
	#[inline(always)]
	fn em(&self) -> U::Number
	{
		self.em
	}
	
	#[inline(always)]
	fn ex(&self) -> U::Number
	{
		self.ex
	}
	
	#[inline(always)]
	fn ch(&self) -> U::Number
	{
		self.ch
	}
	
	#[inline(always)]
	fn rem(&self) -> U::Number
	{
		self.rem
	}
}

impl<U: Unit> ViewportPercentageLengthConversion<U::Number> for SimplisticExampleOfConversion<U>
{
	#[inline(always)]
	fn vw(&self) -> U::Number
	{
		self.vw
	}
	
	#[inline(always)]
	fn vh(&self) -> U::Number
	{
		self.vh
	}
	
	#[inline(always)]
	fn vmin(&self) -> U::Number
	{
		self.vmin
	}
	
	#[inline(always)]
	fn vmax(&self) -> U::Number
	{
		self.vmax
	}
}

impl<U: Unit> PercentageConversion<U::Number> for SimplisticExampleOfConversion<U>
{
	#[inline(always)]
	fn one_hundred_percent_in_absolute_units(&self) -> U::Number
	{
		self.one_hundred_percent_in_absolute_units
	}
}

impl<U: Unit> CssVariableConversion for SimplisticExampleOfConversion<U>
{
	#[inline(always)]
	fn cssVariableValue(&self, css_variable_lower_case_name_without_leading_double_dash: &str) -> Option<&str>
	{
		match self.cssVariablesWithLowerCaseNamesWithoutLeadingDoubleDashToRawCss.get(css_variable_lower_case_name_without_leading_double_dash)
		{
			Some(value) => Some(&value[..]),
			None => None,
		}
	}
}

impl<U: Unit> AttributeConversion<U> for SimplisticExampleOfConversion<U>
{
	/// Returns the (value of the attribute, property default)
	/// In this simplistic example, since we don't know th property name, we assume all property defaults are the specification default: https://drafts.csswg.org/css-values-3/#typedef-type-or-unit
	#[inline(always)]
	fn attributeValue(&self, attribute_lower_case_name: &str) -> (Option<&str>, U)
	{
		match self.attributesWithLowerCaseNames.get(attribute_lower_case_name)
		{
			Some(value) => (Some(&value[..]), U::default()),
			None => (None, U::default()),
		}
	}
}