1 files changed, 125 insertions, 0 deletions
diff --git a/toolkit/themes/windows/global/popup.css b/toolkit/themes/windows/global/popup.css
new file mode 100644
index 0000000000..54ffa2ec8e
--- /dev/null
+++ b/toolkit/themes/windows/global/popup.css
@@ -0,0 +1,125 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");
+@namespace html url("http://www.w3.org/1999/xhtml");
+
+/* ::::: menupopup ::::: */
+
+menupopup,
+panel {
+  min-width: 1px;
+  --panel-background: Menu;
+  --panel-color: MenuText;
+  --panel-padding: 0;
+  --panel-border-radius: 0;
+  --panel-border-color: ThreeDShadow;
+  --panel-width: initial;
+
+  --panel-shadow: 0 0 var(--panel-shadow-margin) hsla(0,0%,0%,.2);
+  --panel-shadow-margin: 4px;
+  -moz-window-input-region-margin: var(--panel-shadow-margin);
+  margin: calc(-1 * var(--panel-shadow-margin));
+}
+
+@media not (-moz-windows-non-native-menus) {
+  menupopup {
+    appearance: auto;
+    -moz-default-appearance: menupopup;
+
+    /* Native menus are always light */
+    color-scheme: light !important;
+
+    /* We set the background-color / border here so that it doesn't interfere with native styling. */
+    background-color: Menu;
+    border: 1px solid ThreeDShadow;
+    --panel-background: transparent;
+    --panel-border-color: transparent;
+    --nested-margin: -3px;
+    --panel-shadow-margin: 0px;
+  }
+}
+
+@media (-moz-windows-non-native-menus) {
+  menupopup {
+    /* Disable the default appearance so we can override the native styling. */
+    appearance: none;
+
+    /* Prevent any background or border around the outside of the shadow. */
+    background-color: transparent;
+    border: none;
+
+    --panel-border-radius: 4px;
+    --panel-padding: 4px 0;
+    --panel-border-color: ThreeDShadow;
+    --panel-background: Menu;
+    --nested-margin: -10px;
+  }
+
+  menupopup > menuitem,
+  menupopup > menu {
+    padding-block: 0.5em;
+    padding-inline-start: 1em;
+  }
+}
+
+menupopup > menu > menupopup {
+ /* align submenus */
+  margin-inline-start: var(--nested-margin);
+  margin-top: var(--nested-margin);
+}
+
+:is(panel, menupopup)[type="arrow"] {
+  appearance: none;
+  background: transparent;
+  border: none;
+}
+
+:is(panel, menupopup)::part(content) {
+  display: flex;
+  box-sizing: border-box;
+  padding: var(--panel-padding);
+  margin: var(--panel-shadow-margin);
+  box-shadow: var(--panel-shadow);
+  color: var(--panel-color);
+  background: var(--panel-background);
+  border-radius: var(--panel-border-radius);
+  border: 1px solid var(--panel-border-color);
+  width: var(--panel-width);
+  min-width: 0;
+  min-height: 0;
+
+  /* Makes popup constraints work */
+  max-height: calc(100% - 2 * var(--panel-shadow-margin));
+  max-width: calc(100% - 2 * var(--panel-shadow-margin));
+}
+
+:is(panel, menupopup)[orient=vertical]::part(content) {
+  flex-direction: column;
+}
+
+panel[type="arrow"].panel-no-padding::part(content) {
+  padding: 0;
+  overflow: hidden; /* Don't let panel content overflow the border-radius */
+}
+
+/* rules for popups associated with menulists */
+
+menulist > menupopup {
+  font: inherit;
+  appearance: none;
+  background-color: transparent;
+  border: none;
+  min-width: 0;
+}
+
+@media not (-moz-windows-non-native-menus) {
+  /* For Win10, the popup itself needs to have a transparent background because
+     otherwise the background color would appear behind the drop shadow. */
+  menulist > menupopup {
+    color: FieldText;
+    --panel-background: Field;
+    --panel-border-color: ThreeDShadow;
+  }
+}