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|
//////////////////////////////
// Import Parser Pieces
//////////////////////////////
@import "parsers/query";
@import "parsers/single";
@import "parsers/double";
@import "parsers/triple";
@import "parsers/resolution";
$Memo-Exists: function-exists(memo-get) and function-exists(memo-set);
//////////////////////////////
// Breakpoint Function
//////////////////////////////
@function breakpoint($query, $contexts...) {
$run: true;
$return: ();
// Grab the Memo Output if Memoization can be a thing
@if $Memo-Exists {
$return: memo-get(breakpoint, breakpoint $query $contexts);
@if $return != null {
$run: false;
}
}
@if not $Memo-Exists or $run {
// Internal Variables
$query-string: '';
$query-fallback: false;
$return: ();
// Reserve Global Private Breakpoint Context
$holder-context: $private-breakpoint-context-holder;
$holder-query-count: $private-breakpoint-query-count;
// Reset Global Private Breakpoint Context
$private-breakpoint-context-holder: () !global;
$private-breakpoint-query-count: 0 !global;
// Test to see if it's a comma-separated list
$or-list: if(list-separator($query) == 'comma', true, false);
@if ($or-list == false and breakpoint-get('legacy syntax') == false) {
$query-string: breakpoint-parse($query);
}
@else {
$length: length($query);
$last: nth($query, $length);
$query-fallback: breakpoint-no-query($last);
@if ($query-fallback != false) {
$length: $length - 1;
}
@if (breakpoint-get('legacy syntax') == true) {
$mq: ();
@for $i from 1 through $length {
$mq: append($mq, nth($query, $i), comma);
}
$query-string: breakpoint-parse($mq);
}
@else {
$query-string: '';
@for $i from 1 through $length {
$query-string: $query-string + if($i == 1, '', ', ') + breakpoint-parse(nth($query, $i));
}
}
}
$return: ('query': $query-string,
'fallback': $query-fallback,
'context holder': $private-breakpoint-context-holder,
'query count': $private-breakpoint-query-count
);
@if length($contexts) > 0 and nth($contexts, 1) != false {
@if $query-fallback != false {
$context-setter: private-breakpoint-set-context('no-query', $query-fallback);
}
$context-map: ();
@each $context in $contexts {
$context-map: map-merge($context-map, ($context: breakpoint-get-context($context)));
}
$return: map-merge($return, (context: $context-map));
}
// Reset Global Private Breakpoint Context
$private-breakpoint-context-holder: () !global;
$private-breakpoint-query-count: 0 !global;
@if $Memo-Exists {
$holder: memo-set(breakpoint, breakpoint $query $contexts, $return);
}
}
@return $return;
}
//////////////////////////////
// General Breakpoint Parser
//////////////////////////////
@function breakpoint-parse($query) {
// Increase number of 'and' queries
$private-breakpoint-query-count: $private-breakpoint-query-count + 1 !global;
// Set up Media Type
$query-print: '';
$force-all: ((breakpoint-get('force all media type') == true) and (breakpoint-get('default media') == 'all'));
$empty-media: true;
@if ($force-all == true) or (breakpoint-get('default media') != 'all') {
// Force the print of the default media type if (force all is true and default media type is all) or (default media type is not all)
$query-print: breakpoint-get('default media');
$empty-media: false;
}
$query-resolution: false;
$query-holder: breakpoint-parse-query($query);
// Loop over each parsed out query and write it to $query-print
$first: true;
@each $feature in $query-holder {
$length: length($feature);
// Parse a single feature
@if ($length == 1) {
// Feature is currently a list, grab the actual value
$feature: nth($feature, 1);
// Media Type must by convention be the first item, so it's safe to flat override $query-print, which right now should only be the default media type
@if (breakpoint-is-media($feature)) {
@if ($force-all == true) or ($feature != 'all') {
// Force the print of the default media type if (force all is true and default media type is all) or (default media type is not all)
$query-print: $feature;
$empty-media: false;
// Set Context
$context-setter: private-breakpoint-set-context(media, $query-print);
}
}
@else {
$parsed: breakpoint-parse-single($feature, $empty-media, $first);
$query-print: '#{$query-print} #{$parsed}';
$first: false;
}
}
// Parse a double feature
@else if ($length == 2) {
@if (breakpoint-is-resolution($feature) != false) {
$query-resolution: $feature;
}
@else {
$parsed: null;
// If it's a string/number pair,
// we check to see if one is a single-string value,
// then we parse it as a normal double
$alpha: nth($feature, 1);
$beta: nth($feature, 2);
@if breakpoint-single-string($alpha) or breakpoint-single-string($beta) {
$parsed: breakpoint-parse-single($alpha, $empty-media, $first);
$query-print: '#{$query-print} #{$parsed}';
$first: false;
$parsed: breakpoint-parse-single($beta, $empty-media, $first);
$query-print: '#{$query-print} #{$parsed}';
}
@else {
$parsed: breakpoint-parse-double($feature, $empty-media, $first);
$query-print: '#{$query-print} #{$parsed}';
$first: false;
}
}
}
// Parse a triple feature
@else if ($length == 3) {
$parsed: breakpoint-parse-triple($feature, $empty-media, $first);
$query-print: '#{$query-print} #{$parsed}';
$first: false;
}
}
@if ($query-resolution != false) {
$query-print: breakpoint-build-resolution($query-print, $query-resolution, $empty-media, $first);
}
// Loop through each feature that's been detected so far and append 'false' to the the value list to increment their counters
@each $f, $v in $private-breakpoint-context-holder {
$v-holder: $v;
$length: length($v-holder);
@if length($v-holder) < $private-breakpoint-query-count {
@for $i from $length to $private-breakpoint-query-count {
@if $f == 'media' {
$v-holder: append($v-holder, breakpoint-get('default media'));
}
@else {
$v-holder: append($v-holder, false);
}
}
}
$private-breakpoint-context-holder: map-merge($private-breakpoint-context-holder, ($f: $v-holder)) !global;
}
@return $query-print;
}
|
