icons: install switch-(on|off)-symbolic icons in GIMP's hicolor theme.

These icons are not available in any of our themes (Symbolic or Color).
Also they don't seem to be available in many icon themes either actually
and I'm not sure GIMP properly fallbacks to system icon theme when an
icon is missing in the selected theme anyway (I think to remember this
used to work, but it doesn't look like it works anymore).

Anyway I just copied the 2 symbolic switch on|off icons available in the
GTK+ repository at gtk/icons/scalable/status/. These are supposed to be
used by GtkSwitch but somehow they aren't. So for the time being, let's
bundle them directly with GIMP (until we figure something better out).
I put them in hicolor because this is the generic/default theme which is
always used as last resort and is common to any theme. It means any
specific theme will be able to override these icons, but if missing,
hicolor will be able to provide a fallback.

configure.ac

@@ -3090,6 +3090,7 @@ icons/Makefile
 icons/Color/Makefile
 icons/Legacy/Makefile
 icons/Symbolic/Makefile
+icons/hicolor/Makefile
 themes/Makefile
 themes/System/Makefile
 data/Makefile

icons/Makefile.am

@@ -1,12 +1,5 @@
 SUBDIRS = \
 	Color		\
 	Legacy		\
-	Symbolic
+	Symbolic	\
-
+	hicolor
-iconsdir = $(gimpdatadir)/icons/hicolor
-
-icons_DATA = \
-	index.theme
-
-EXTRA_DIST = \
-	$(icons_DATA)

icons/hicolor/Makefile.am

@@ -0,0 +1,12 @@
+iconsdir = $(gimpdatadir)/icons/hicolor
+icons_DATA = \
+	index.theme
+
+actionsdir = $(iconsdir)/scalable/actions
+actions_DATA = \
+	scalable/switch-on-symbolic.svg		\
+	scalable/switch-off-symbolic.svg
+
+EXTRA_DIST = \
+	$(icons_DATA)		\
+	$(actions_DATA)

icons/hicolor/index.theme

@@ -0,0 +1,13 @@
+[Icon Theme]
+Name=Hicolor
+Comment=Fallback icon theme
+Hidden=true
+
+Directories=scalable/actions
+
+[scalable/actions]
+Context=Actions
+Size=16
+MinSize=8
+MaxSize=512
+Type=Scalable

icons/hicolor/meson.build

@@ -0,0 +1,16 @@
+install_data('index.theme',
+  install_dir: gimpiconsdir / theme,
+)
+
+generic_icons = [
+  [ 'scalable/actions/', 'scalable/switch-on-symbolic.svg' ],
+  [ 'scalable/actions/', 'scalable/switch-off-symbolic.svg' ]
+]
+
+foreach icon_info : generic_icons
+  icons_dir = icon_info[0]
+  icons_list= icon_info[1]
+  install_data(icons_list,
+    install_dir: gimpiconsdir / theme / icons_dir,
+  )
+endforeach

icons/hicolor/scalable/switch-off-symbolic.svg

@@ -0,0 +1,62 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="16"
+   height="16"
+   viewBox="0 0 16 16"
+   version="1.1"
+   id="svg8"
+   inkscape:version="0.92.4 5da689c313, 2019-01-14"
+   sodipodi:docname="switch-off-symbolic.svg">
+  <defs
+     id="defs2" />
+  <sodipodi:namedview
+     id="base"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageopacity="0.0"
+     inkscape:pageshadow="2"
+     inkscape:zoom="11.858493"
+     inkscape:cx="-1.0931113"
+     inkscape:cy="14.095717"
+     inkscape:document-units="px"
+     inkscape:current-layer="layer1"
+     showgrid="true"
+     units="px">
+    <inkscape:grid
+       type="xygrid"
+       id="grid815" />
+  </sodipodi:namedview>
+  <metadata
+     id="metadata5">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title />
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1"
+     transform="translate(0,-292.76666)">
+    <path
+       style="color:#000000;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:medium;line-height:normal;font-family:sans-serif;font-variant-ligatures:normal;font-variant-position:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-alternates:normal;font-feature-settings:normal;text-indent:0;text-align:start;text-decoration:none;text-decoration-line:none;text-decoration-style:solid;text-decoration-color:#000000;letter-spacing:normal;word-spacing:normal;text-transform:none;writing-mode:lr-tb;direction:ltr;text-orientation:mixed;dominant-baseline:auto;baseline-shift:baseline;text-anchor:start;white-space:normal;shape-padding:0;clip-rule:nonzero;display:inline;overflow:visible;visibility:visible;opacity:1;isolation:auto;mix-blend-mode:normal;color-interpolation:sRGB;color-interpolation-filters:linearRGB;solid-color:#000000;solid-opacity:1;vector-effect:none;fill:#000000;fill-opacity:1;fill-rule:nonzero;stroke:none;stroke-width:2;stroke-linecap:butt;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1;marker:none;paint-order:normal;color-rendering:auto;image-rendering:auto;shape-rendering:auto;text-rendering:auto;enable-background:accumulate"
+       d="m 7.9785156,295.73828 c -2.7589327,0 -5.015625,2.25865 -5.015625,5.01758 0,2.75893 2.2566923,5.01758 5.015625,5.01758 2.7589324,0 5.0175784,-2.25865 5.0175784,-5.01758 0,-2.75893 -2.258646,-5.01758 -5.0175784,-5.01758 z m 0,2 c 1.6780526,0 3.0175784,1.33953 3.0175784,3.01758 0,1.67805 -1.3395258,3.01758 -3.0175784,3.01758 -1.6780525,0 -3.015625,-1.33953 -3.015625,-3.01758 0,-1.67805 1.3375725,-3.01758 3.015625,-3.01758 z"
+       id="path838"
+       inkscape:connector-curvature="0" />
+  </g>
+</svg>

icons/hicolor/scalable/switch-on-symbolic.svg

@@ -0,0 +1,64 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="16"
+   height="16"
+   viewBox="0 0 16 16"
+   version="1.1"
+   id="svg8"
+   inkscape:version="0.92.4 5da689c313, 2019-01-14"
+   sodipodi:docname="on-symbolic.svg">
+  <defs
+     id="defs2" />
+  <sodipodi:namedview
+     id="base"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageopacity="0.0"
+     inkscape:pageshadow="2"
+     inkscape:zoom="31.678384"
+     inkscape:cx="10.416792"
+     inkscape:cy="9.9204611"
+     inkscape:document-units="px"
+     inkscape:current-layer="layer1"
+     showgrid="true"
+     units="px">
+    <inkscape:grid
+       type="xygrid"
+       id="grid815" />
+  </sodipodi:namedview>
+  <metadata
+     id="metadata5">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title></dc:title>
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1"
+     transform="translate(0,-292.76666)">
+    <rect
+       style="opacity:1;vector-effect:none;fill:#000000;fill-opacity:1;stroke:none;stroke-width:2.58198857;stroke-linecap:butt;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1;marker:none;marker-start:none;marker-mid:none;marker-end:none;paint-order:normal"
+       id="rect817"
+       width="2"
+       height="9.9999971"
+       x="7"
+       y="295.76666" />
+  </g>
+</svg>

icons/index.theme

@@ -1,6 +0,0 @@
-[Icon Theme]
-Name=Hicolor
-Comment=Fallback icon theme
-Hidden=true
-
-Directories=

icons/meson.build

@@ -1638,12 +1638,9 @@ themes = [
   'Color',
   # 'Legacy',
   'Symbolic',
+  'hicolor'
 ]
 
 foreach theme : themes
   subdir(theme)
 endforeach
-
-install_data('index.theme',
-  install_dir: gimpiconsdir / 'hicolor',
-)