Bug 677027 - Implement conditional forward button for gnomestripe. r=shorlander

browser/themes/gnomestripe/browser/browser.css

@@ -603,18 +603,37 @@ toolbar[mode="full"] .toolbarbutton-1 > .toolbarbutton-menubutton-button {
 
 #forward-button {
   list-style-image: url("moz-icon://stock/gtk-go-forward-ltr?size=toolbar");
+  -moz-transition: 250ms ease-out;
 }
-#forward-button[disabled="true"] {
-  list-style-image: url("moz-icon://stock/gtk-go-forward-ltr?size=toolbar&state=disabled");
-}
-
 #forward-button:-moz-locale-dir(rtl) {
   list-style-image: url("moz-icon://stock/gtk-go-forward-rtl?size=toolbar");
 }
-#forward-button[disabled="true"]:-moz-locale-dir(rtl) {
+
+toolbar:not([mode=icons]) #forward-button[disabled="true"] {
+  list-style-image: url("moz-icon://stock/gtk-go-forward-ltr?size=toolbar&state=disabled");
+}
+toolbar:not([mode=icons]) #forward-button[disabled="true"]:-moz-locale-dir(rtl) {
   list-style-image: url("moz-icon://stock/gtk-go-forward-rtl?size=toolbar&state=disabled");
 }
 
+toolbar[mode=icons] #forward-button[disabled="true"] {
+  -moz-transform: scale(0);
+  opacity: 0;
+  pointer-events: none;
+}
+toolbar[mode=icons] #forward-button[disabled="true"]:-moz-locale-dir(ltr) {
+  margin-left: -36px;
+}
+toolbar[mode=icons] #forward-button[disabled="true"]:-moz-locale-dir(rtl) {
+  margin-right: -36px;
+}
+toolbar[mode=icons][iconsize=small] #forward-button[disabled="true"]:-moz-locale-dir(ltr) {
+  margin-left: -28px;
+}
+toolbar[mode=icons][iconsize=small] #forward-button[disabled="true"]:-moz-locale-dir(rtl) {
+  margin-right: -28px;
+}
+
 #reload-button {
   list-style-image: url("moz-icon://stock/gtk-refresh?size=toolbar");
 }
@@ -786,7 +805,7 @@ toolbar[iconsize="small"] #forward-button {
 .unified-nav-forward[_moz-menuactive] {
   list-style-image: url("moz-icon://stock/gtk-go-forward-ltr?size=menu") !important;
 }
-toolbar[iconsize="small"] #forward-button[disabled="true"] {
+toolbar[iconsize="small"]:not([mode=icons]) #forward-button[disabled="true"] {
   list-style-image: url("moz-icon://stock/gtk-go-forward-ltr?size=menu&state=disabled");
 }
 
@@ -796,7 +815,7 @@ toolbar[iconsize="small"] #forward-button:-moz-locale-dir(rtl) {
 .unified-nav-forward[_moz-menuactive]:-moz-locale-dir(rtl) {
   list-style-image: url("moz-icon://stock/gtk-go-forward-rtl?size=menu") !important;
 }
-toolbar[iconsize="small"] #forward-button[disabled="true"]:-moz-locale-dir(rtl) {
+toolbar[iconsize="small"]:not([mode=icons]) #forward-button[disabled="true"]:-moz-locale-dir(rtl) {
   list-style-image: url("moz-icon://stock/gtk-go-forward-rtl?size=menu&state=disabled");
 }