Add rofi theme scaffolding

Themes are structured in two parts: layout and colorschemes. Both can be
set independently from each other. Layouts can make use of anchored
color values (@background, @background-focus,.. look at colorscheme
files for all available values). Colorscheme files then translate the
values into actual colorcodes.

That way, the colorscheme for all layouts can be changed with one
setting, or independently of each other. Layouts try to specify some
often used structures for rofi menus - right now there is a horizontal
list and a fullscreen options selection (which can make use of icon
fonts).

Any global theme changes should be done in settings.rasi. Any global
function changes can still be done in config.rasi. A rofi-powermenu has
been added as an example of using the theming structure. The powermenu
script loads rofi with the powermenu.rasi theme enabled. The powermenu
theme loads the fullscreen options layout, which in turn loads the
vertical list layout, which loads settings, which sets the correct
colors. Idea and original structure from:
https://gitlab.com/vahnrr/rofi-menus

.config/rofi/config.rasi

@@ -1,5 +1,19 @@
 configuration {
-	modi: "window,run,ssh,drun,combi,keys,calc";
+  show-icons:         true;
+  icon-theme:         "Paper";
+  theme: "themes/settings.rasi";
+  cycle:              true;
+  hide-scrollbar:     true;
+  disable-history:    false;
+  modi:               "drun";
+  display-drun:       "apps";
+  columns: 2;
+	pid: "/run/user/1000/rofi.pid";
+}
+
+/* ALL OPTIONS */
+/* configuration { */
+/* modi: "window,run,ssh,drun,combi,keys,calc"; */
 /*	width: 50;*/
 /*	lines: 15;*/
 /*	columns: 1;*/
@@ -43,7 +57,7 @@ configuration {
 /*	filter: ;*/
 /*	separator-style: "dash";*/
 /*	hide-scrollbar: false;*/
-	fullscreen: false;
+/* fullscreen: false; */
 /*	fake-transparency: false;*/
 /*	dpi: -1;*/
 /*	threads: 0;*/
@@ -53,7 +67,7 @@ configuration {
 /*	window-format: "{w}    {c}   {t}";*/
 /*	click-to-exit: true;*/
 /*	show-match: true;*/
-	theme: "dmenu";
+/* theme: "dmenu"; */
 /*	color-normal: ;*/
 /*	color-urgent: ;*/
 /*	color-active: ;*/
@@ -62,7 +76,7 @@ configuration {
 /*	combi-hide-mode-prefix: false;*/
 /*	matching-negate-char: '-' /* unsupported */;*/
 /*	cache-dir: ;*/
-	pid: "/run/user/1000/rofi.pid";
+/* pid: "/run/user/1000/rofi.pid"; */
 /*	display-window: ;*/
 /*	display-windowcd: ;*/
 /*	display-run: ;*/
@@ -143,4 +157,4 @@ configuration {
 /*	me-select-entry: "MousePrimary";*/
 /*	me-accept-entry: "MouseDPrimary";*/
 /*	me-accept-custom: "Control+MouseDPrimary";*/
-}
+/* } */

.config/rofi/modes/rofi-powermenu

@@ -0,0 +1,37 @@
+#!/usr/bin/sh
+
+rofi_command="rofi -theme themes/powermenu.rasi"
+
+### Options ###
+power_off=""
+reboot=""
+lock=""
+suspend_btn="鈴"
+logout_btn=""
+# Variable passed to rofi
+
+chosen="$(printf "%s\n%s\n%s\n%s\n%s" "$power_off" "$reboot" "$lock" "$suspend_btn" "$logout_btn" | $rofi_command -dmenu -selected-row 2)"
+case $chosen in
+$power_off)
+	printf "poweroff"
+	# systemctl poweroff
+	;;
+$reboot)
+	printf "reboot"
+	# systemctl reboot
+	;;
+$lock)
+	printf "lock"
+	# light-locker-command -l
+	;;
+$suspend_btn)
+	printf "suspend"
+	# mpc -q pause
+	# amixer set Master mute
+	# systemctl suspend
+	;;
+$logout_btn)
+	printf "logout_btn"
+	# i3-msg exit
+	;;
+esac

.config/rofi/themes/colorschemes/gruvbox-dark.rasi

@@ -0,0 +1,11 @@
+* {
+accent:           #83a598;                    // anything which should be accented
+background:       #282828;                    // rofi background color
+									background-nofocus: #282828;// bg of items not focused
+									background-focus: #1d2021;  // bg of item focused
+foreground:       #ebdbb2;                    // rofi foreground color
+									foreground-nofocus: #ebdbb2;// fg of items not focused
+									foreground-focus: #83a598;  // fg of items focused
+on:               #83a598;                    // color to signify something is turned on
+off:              #fb4934;                    // color to signify something is turned off
+}

.config/rofi/themes/layouts/list-horizontal.rasi

@@ -0,0 +1,28 @@
+/**
+ * Settings for a  general purpose
+ * horizontal options list menu:
+ */
+@import "../settings.rasi"
+* {
+	background-color: @background;
+	text-color: @foreground;
+  font: @text-font;
+}
+#window {
+children: [ horibox  ];
+}
+#horibox {
+children: [ listview  ];
+}
+#listview {
+layout: horizontal;
+}
+#element {
+padding: @option-element-padding;
+				 background-color: @background-nofocus;
+         text-color: @foreground-nofocus;
+}
+#element.selected {
+	background-color: @background-focus;
+	text-color: @foreground-focus;
+}

.config/rofi/themes/layouts/options-horizontal-fullscreen.rasi

@@ -0,0 +1,41 @@
+/**
+ * Settings for a general purpose full screen
+ * horizontal options screen. The options will
+ * make use of icons.
+ * Px values for 1920x1080 screens.
+ *
+ * Depending on how many options your list
+ * should display, choose the corresponding padding and spacing
+ * for window and listview from below and add it to your
+ * specific theme.
+ */
+
+@import "list-horizontal.rasi"
+* {
+	/* General */
+	icon-font:                            "Iosevka 48";
+  font:                                 @icon-font;
+	inputbar-margin:                      4px 4px;
+	prompt-padding:                       16px 20px;
+	entry-padding:                        18px 16px 16px 0px;
+	list-element-padding:                 20px;
+	list-element-margin:                  @inputbar-margin;
+	list-element-border:                  0px 0px 0px 8px;
+	list-8-window-padding:                219px 360px;
+	/**
+	 * Values bellow are 'no-padding' ones for Iosevka icons in this size.
+   * If you use a different sized font, you will have to find your own
+   * padding and spacing values.
+	 *                                    -12px 0px   -19px -96px */
+	option-element-padding:               88px  100px 81px  4px;
+	option-3-window-padding:              415px 446px;
+	option-3-listview-spacing:            140px;
+	option-5-window-padding:              415px 183px;
+	option-5-listview-spacing:            77px;
+	option-6-listview-spacing:            50px;
+}
+
+#window {
+	width: 100%;
+	height: 100%;
+}

.config/rofi/themes/powermenu.rasi

@@ -0,0 +1,14 @@
+/**
+ * This theme is intended for a 5 items wide menu on a 1920x1080 pixels resolution.
+ * You may have to tweak values such as the window padding if you have a different resolution.
+ */
+
+@import "layouts/options-horizontal-fullscreen.rasi"
+
+#window {
+	padding: @option-5-window-padding;
+}
+#listview {
+spacing: @option-5-listview-spacing;
+lines: 5;
+}

.config/rofi/themes/settings.rasi

@@ -0,0 +1,40 @@
+/**
+ * Changing this file allows all other theme files to be affected since
+ * they all get their default settings from here.
+ * Idea cribbed from: https://gitlab.com/vahnrr/rofi-menus
+ *
+ * Structure (what goes where) should be set in specific theme files, which pull from more general layouts/ files
+ * Color (what has which accent) can be added with colorschemes/ files, and then set globally from here
+ *
+ *      if a layout needs a *very* specific colorscheme it can also be set in the layouts/theme files
+ *      but try to keep the two separated as much as possible, so we can adjust global options easily from here
+ */
+
+@import "colorschemes/gruvbox-dark.rasi"
+
+* {
+	/* General */
+	text-font:                            "Iosevka Nerd Font";
+	text-font-mono:                       "Iosevka Nerd Font";
+	icon-font:                            "Iosevka Nerd Font";
+	icon-font-small:                      "Iosevka Nerd Font";
+}
+
+/**
+ * In case rofi gets started without a specific theme
+ * try to match the imported theme colors as best we
+ * can to any general purpose.
+ */
+* {
+  background-color: @background;
+  text-color:       @foreground;
+  font:             @text-font;
+}
+#element {
+  background-color: @background-nofocus;
+  text-color:       @foreground-nofocus;
+}
+#element.selected {
+  background-color: @background-focus;
+  text-color:       @foreground-focus;
+}