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-rw-r--r--library/Icinga/Less/Call.php77
1 files changed, 77 insertions, 0 deletions
diff --git a/library/Icinga/Less/Call.php b/library/Icinga/Less/Call.php
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+<?php
+
+/* Icinga Web 2 | (c) 2022 Icinga GmbH | GPLv2+ */
+
+namespace Icinga\Less;
+
+use Less_Tree_Call;
+use Less_Tree_Color;
+use Less_Tree_Value;
+use Less_Tree_Variable;
+
+class Call extends Less_Tree_Call
+{
+ public static function fromCall(Less_Tree_Call $call)
+ {
+ return new static($call->name, $call->args, $call->index, $call->currentFileInfo);
+ }
+
+ public function compile($env = null)
+ {
+ if (! $env) {
+ // Not sure how to trigger this, but if there is no $env, there is nothing we can do
+ return parent::compile($env);
+ }
+
+ foreach ($this->args as $arg) {
+ if (! is_array($arg->value)) {
+ continue;
+ }
+
+ $name = null;
+ if ($arg->value[0] instanceof Less_Tree_Variable) {
+ // This is the case when defining a variable with a callable LESS rules such as fade, fadeout..
+ // Example: `@foo: #fff; @foo-bar: fade(@foo, 10);`
+ $name = $arg->value[0]->name;
+ } elseif ($arg->value[0] instanceof ColorPropOrVariable) {
+ // This is the case when defining a CSS rule using the LESS functions and passing
+ // a variable as an argument to them. Example: `... { color: fade(@foo, 10%); }`
+ $name = $arg->value[0]->getVariable()->name;
+ }
+
+ if ($name) {
+ foreach ($env->frames as $frame) {
+ if (($v = $frame->variable($name))) {
+ // Variables from the frame stack are always of type LESS Tree Rule
+ $vr = $v->value;
+ if ($vr instanceof Less_Tree_Value) {
+ // Get the actual color prop, otherwise this may cause an invalid argument error
+ $vr = $vr->compile($env);
+ }
+
+ if ($vr instanceof DeferredColorProp) {
+ if (! $vr->hasReference()) {
+ // Should never happen, though just for safety's sake
+ $vr->compile($env);
+ }
+
+ // Get the uppermost variable of the variable references
+ while (! $vr instanceof ColorProp) {
+ $vr = $vr->getRef();
+ }
+ } elseif ($vr instanceof Less_Tree_Color) {
+ $vr = ColorProp::fromColor($vr);
+ $vr->setName($name);
+ }
+
+ $arg->value[0] = $vr;
+
+ break;
+ }
+ }
+ }
+ }
+
+ return parent::compile($env);
+ }
+}