gnome-shell/data/theme/_drawing.scss

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// Drawing mixins
// generic drawing of more complex things
@function _widget_edge($c:$borders_edge) {
// outer highlight "used" on most widgets
@return 0 1px $c;
}
// provide font size in rem, with px fallback
@mixin fontsize($size: 24, $base: 16) {
font-size: round($size) + pt;
//font-size: ($size / $base) * 1rem;
}
@mixin _shadows($shadow1, $shadow2:none, $shadow3:none, $shadow4:none) {
//
// Helper function to stack up to 4 box-shadows;
//
@if $shadow4!=none { box-shadow: $shadow1, $shadow2, $shadow3, $shadow4; }
@else if $shadow3!=none { box-shadow: $shadow1, $shadow2, $shadow3; }
@else if $shadow2!=none { box-shadow: $shadow1, $shadow2; }
@else { box-shadow: $shadow1; }
}
// entries
@mixin entry($t, $fc:$selected_bg_color, $edge: $borders_edge) {
//
// Entries drawing function
//
// $t: entry type
// $fc: focus color
// $edge: set to none to not draw the bottom edge or specify a color to not
// use the default one
//
// possible $t values:
// normal, focus, insensitive
//
$_inner_shadows: inset 0 2px 4px transparentize(black, 0.6);
@if $t==normal {
background-color: $base_color;
border-color: $borders_color;
@include _shadows($_inner_shadows);
}
@if $t==focus {
@include _shadows($_inner_shadows);
border-color: if($fc==$selected_bg_color,
$selected_borders_color,
darken($fc,35%));
}
@if $t==hover { }
@if $t==insensitive {
color: $insensitive_fg_color;
border-color: $insensitive_bg_color;
box-shadow: none;
}
}
// buttons
@function _border_color ($c) { @return darken($c,25%); } // colored buttons want
// the border form the
// base color
@function _text_shadow_color ($tc:$fg_color, $bg:$bg_color) {
//
// calculate the color of text shadows
//
// $tc is the text color
// $bg is the background color
//
$_lbg: lightness($bg)/100%;
@if lightness($tc)<50% { @return transparentize(white,1-$_lbg/($_lbg*1.3)); }
@else { @return transparentize(black,$_lbg*0.8); }
}
@function _button_hilight_color($c) {
//
// calculate the right top hilight color for buttons
//
// $c: base color;
//
@if lightness($c)>90% { @return white; }
@else if lightness($c)>80% { @return transparentize(white, 0.3); }
@else if lightness($c)>50% { @return transparentize(white, 0.5); }
@else if lightness($c)>40% { @return transparentize(white, 0.7); }
@else { @return transparentize(white, 0.9); }
}
@mixin _button_text_shadow ($tc:$fg_color, $bg:$bg_color) {
//
// helper function for the text emboss effect
//
// $tc is the optional text color, not the shadow color
//
// TODO: this functions needs a way to deal with special cases
//
$_shadow: _text_shadow_color($tc, $bg);
@if lightness($tc)<50% {
text-shadow: 0 1px $_shadow;
icon-shadow: 0 1px $_shadow;
}
@else {
text-shadow: 0 -1px $_shadow;
icon-shadow: 0 -1px $_shadow;
}
}
@mixin button($t, $c:$osd_bg_color, $tc:$fg_color, $edge: $borders_edge) {
//
// Button drawing function
//
// $t: button type,
// $c: base button color for colored* types
// $tc: optional text color for colored* types
// $edge: set to none to not draw the bottom edge or specify a color to not
// use the default one
//
// possible $t values:
// normal, hover, active, insensitive, insensitive-active,
// backdrop, backdrop-active, backdrop-insensitive, backdrop-insensitive-active,
// osd, osd-hover, osd-active, osd-insensitive, osd-backdrop, undecorated
//
$_hilight_color: _button_hilight_color($c);
$_button_edge: if($edge == none, none, _widget_edge($edge));
$_blank_edge: if($edge == none, none, _widget_edge(transparentize($edge,1)));
@if $t==normal {
//
// normal button
//
$_bg: if($c!=$osd_bg_color, transparentize($c, 0.5),
$osd_bg_color);
color: $osd_fg_color;
background-color: $_bg;
border-color: $osd_borders_color;
box-shadow: inset 0 1px lighten($osd_bg_color,10%);
text-shadow: 0 1px black;
icon-shadow: 0 1px black;
}
@if $t==focus {
//
// focused button
//
$_bg: if($c!=$osd_bg_color, transparentize($c, 0.5),
$osd_bg_color);
color: $osd_fg_color;
border-color: $selected_bg_color;
box-shadow: inset 0 1px lighten($osd_bg_color,10%);
text-shadow: 0 1px black;
icon-shadow: 0 1px black;
}
@else if $t==hover {
//
// active osd button
//
$_bg: if($c!=$osd_bg_color, transparentize($c, 0.3),
lighten($osd_bg_color,10%));
color: white;
border-color: $osd_borders_color;
background-color: $_bg;
box-shadow: inset 0 1px lighten($osd_bg_color,20%);
text-shadow: 0 1px black;
icon-shadow: 0 1px black;
}
@else if $t==active {
//
// active osd button
//
$_bg: if($c!=$bg_color, $c, $osd_borders_color);
color: white;
border-color: $osd_borders_color;
background-color: darken($_bg,5%);
box-shadow: none;
text-shadow: none;
icon-shadow: none;
}
@else if $t==insensitive {
//
// insensitive osd button
//
$_bg: transparentize(mix($insensitive_fg_color,$osd_bg_color,20%),0.3);
color: $insensitive_fg_color;
border-color: $osd_borders_color;
background-color: $_bg;
box-shadow: none;
text-shadow: none;
icon-shadow: none;
}
@else if $t==undecorated {
//
// reset
//
border-color: transparent;
background-color: transparent;
background-image: none;
@include _shadows(inset 0 1px transparentize(white,1),
$_blank_edge);
text-shadow: none;
icon-shadow: none;
}
}