1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
|
// stylelint-disable declaration-property-value-blacklist
// RFS mixin.
//
// Automated font-resizing.
//
// See https://github.com/MartijnCuppens/rfs.
// Configuration.
// Minimum fontsize.
$rfs-minimum-font-size: 1rem !default
$rfs-font-size-unit: rem !default
// Breakpoint at where font-size starts decreasing if screen width is smaller.
$rfs-breakpoint: 1200px !default
$rfs-breakpoint-unit: px !default
// Resize font-size based on screen height and width.
$rfs-two-dimensional: false !default
// Factor of decrease.
$rfs-factor: 5 !default
// Generate disable classes
$rfs-generate-disable-classes: true !default
// 1 rem = $rfs-rem-value px.
$rfs-rem-value: 16 !default
// Disable RFS by setting $enable-responsive-font-sizes to false.
$enable-responsive-font-sizes: true !default
@if $enable-responsive-font-sizes == false
// If $rfs-factor is set to 1, fluid font-resizing is disabled.
$rfs-factor: 1
// Remove px-unit from $rfs-minimum-font-size for calculations.
@if unit($rfs-minimum-font-size) == "px"
$rfs-minimum-font-size: $rfs-minimum-font-size / ($rfs-minimum-font-size * 0 + 1)
@else if unit($rfs-minimum-font-size) == "rem"
$rfs-minimum-font-size: $rfs-minimum-font-size / ($rfs-minimum-font-size * 0 + 1 / $rfs-rem-value)
// Remove unit from $rfs-breakpoint for calculations.
@if unit($rfs-breakpoint) == "px"
$rfs-breakpoint: $rfs-breakpoint / ($rfs-breakpoint * 0 + 1)
@else if unit($rfs-breakpoint) == "rem" or unit($rfs-breakpoint) == "em"
$rfs-breakpoint: $rfs-breakpoint / ($rfs-breakpoint * 0 + 1 / $rfs-rem-value)
// Responsive font-size mixin.
=rfs($fs, $important: false)
$rfs-suffix: ""
// Add !important suffix if needed.
@if $important
$rfs-suffix: " !important"
// If $fs isn't a number (like inherit) or $fs has a unit (not px or rem, like 1.5em) or $ is 0, just print the value.
@if type-of($fs) != "number" or not unitless($fs) and unit($fs) != "px" and unit($fs) != "rem" or $fs == 0
font-size: #{$fs}#{$rfs-suffix}
@else
// Variables for storing static and fluid rescaling.
$rfs-static: null
$rfs-fluid: null
// Remove px-unit from $fs for calculations.
@if unit($fs) == "px"
$fs: $fs / ($fs * 0 + 1)
@else if unit($fs) == "rem"
$fs: $fs / ($fs * 0 + 1 / $rfs-rem-value)
// Set default font-size.
@if $rfs-font-size-unit == rem
$rfs-static: #{$fs / $rfs-rem-value}rem#{$rfs-suffix}
@else if $rfs-font-size-unit == px
$rfs-static: #{$fs}px#{$rfs-suffix}
@else
@error "`#{$rfs-font-size-unit}` is not a valid unit for $rfs-font-size-unit. Use `px` or `rem`."
@if type-of($rfs-factor) != "number" or $rfs-factor < 1
@error "`#{$rfs-factor}` is not a valid $rfs-factor, it must be greater or equal to 1."
// Only add media query if font-size is bigger as the minimum font-size.
// If $rfs-factor == 1, no rescaling will take place.
@if $fs > $rfs-minimum-font-size and $rfs-factor != 1
$min-width: null
$variable-unit: null
// Calculate minimum font-size for given font-size.
$fs-min: $rfs-minimum-font-size + ($fs - $rfs-minimum-font-size) / $rfs-factor
// Calculate difference between given font-size and minimum font-size for given font-size.
$fs-diff: $fs - $fs-min
// Minimum font-size formatting.
// No need to check if the unit is valid, because we did that before.
@if $rfs-font-size-unit == rem
$min-width: #{$fs-min / $rfs-rem-value}rem
@else
$min-width: #{$fs-min}px
// If two-dimensional, use smallest of screen width and height.
@if $rfs-two-dimensional
$variable-unit: vmin
@else
$variable-unit: vw
// Calculate the variable width between 0 and $rfs-breakpoint.
$variable-width: #{$fs-diff * 100 / $rfs-breakpoint}#{$variable-unit}
// Set the calculated font-size.
$rfs-fluid: calc(#{$min-width} + #{$variable-width}) #{$rfs-suffix}
// Rendering.
@if $rfs-fluid == null
// Only render static font-size if no fluid font-size is available.
font-size: $rfs-static
@else
$mq-value: null
// RFS breakpoint formatting.
@if $rfs-breakpoint-unit == em or $rfs-breakpoint-unit == rem
$mq-value: #{$rfs-breakpoint / $rfs-rem-value}#{$rfs-breakpoint-unit}
@else if $rfs-breakpoint-unit == px
$mq-value: #{$rfs-breakpoint}px
@else
@error "`#{$rfs-breakpoint-unit}` is not a valid unit for $rfs-breakpoint-unit. Use `px`, `em` or `rem`."
@if $rfs-generate-disable-classes
// Adding an extra class increases specificity,
// which prevents the media query to override the font size
&,
.disable-responsive-font-size &,
&.disable-responsive-font-size
font-size: $rfs-static
@else
font-size: $rfs-static
@if $rfs-two-dimensional
@media (max-width: #{$mq-value}), (max-height: #{$mq-value})
font-size: $rfs-fluid
@else
@media (max-width: #{$mq-value})
font-size: $rfs-fluid
// The responsive-font-size mixin uses RFS to rescale font sizes.
=responsive-font-size($fs, $important: false)
+rfs($fs, $important)
|
