Add filtered rendering

Instead of rendering out everything in an svg-file,
the render script now takes in a regular expression that is uses to
search all the object-IDs inside each of the svg-files for a match
and only renders those. To make the search go faster all object-IDs
are stored in files named ".<svg-file-name>.cache" after every full
render of an svg-file or if none exist.

.gitignore

@@ -10,3 +10,4 @@ install-sh
 missing
 *.tmp
 *_timestamp
+*.cache

src/render_icons.sh

@@ -35,17 +35,15 @@ cp -ru animations $THEMEDIR/.
 cp -ru panel $THEMEDIR/.
 
 
-# Generates inkscape export commands for the given
+# Takes in an svg-file and an object-id and formats it
-# svg-file that can be piped to inkscape.
+# to an inkscape export shell command that inkscape can
-genInkscapeCmds() {
+# then execute.
+formatInkscapeCmd() {
 
     local CONTEXT=$1
+    local OBJECT_ID=$2
+    local SIZE=$(sed -r 's/.*\_([0-9]+).*$/\1/' <<< $OBJECT_ID)
 
-    for SIZE in ${SIZES[@]}
-    do
-        echo "Rendering icons $CONTEXT.svg @$SIZE" >&2
-        for OBJECT_ID in `cat <($INKSCAPE -S $CONTEXT.svg | grep -E "_$SIZE" | sed 's/\,.*$//')`
-        do
     local ICON_NAME=$(sed "s/\_$SIZE.*$//" <<< $OBJECT_ID)
 
         echo \
@@ -58,10 +56,53 @@ genInkscapeCmds() {
             "--export-dpi=180" \
             "--export-id-only" \
             "--export-png=$THEMEDIR/$CONTEXT/$SIZE@2x/$ICON_NAME.png $CONTEXT.svg"
-        done
-    done
 }
 
+# Generates inkscape export commands for the given
+# svg-file that can be piped to inkscape.
+genInkscapeCmds() {
+
+    local CONTEXT=$1
+
+    for SIZE in ${SIZES[@]}
+    do
+        for OBJECT_ID in `cat <($INKSCAPE -S $CONTEXT.svg | grep -E "_$SIZE" | sed 's/\,.*$//')`
+        do
+            echo $OBJECT_ID >> .$CONTEXT.cache.tmp
+            formatInkscapeCmd $CONTEXT $OBJECT_ID
+        done
+    done
+    mv .$CONTEXT.cache.tmp .$CONTEXT.cache
+}
+
+# Generates inkscape export commands that matches
+# the provided regex pattern.
+genInkscapeCmdsFiltered() {
+    
+    local CONTEXT=$1
+    local REGEX=$2
+    
+    while read -r OBJECT_ID
+    do
+        echo "Match: $OBJECT_ID" >&2
+        formatInkscapeCmd $CONTEXT $OBJECT_ID
+    done < <(grep -E $REGEX .$CONTEXT.cache)
+}
+
+if [[ ! -z $1 ]]
+then
+    echo "Rendering objects with IDs matching regex"
+    for CONTEXT in ${TYPES[@]}
+    do
+        if [[ -f .$CONTEXT.cache ]] || { [[ ! -f .$CONTEXT.cache ]] && ($INKSCAPE -S $CONTEXT.svg | grep -E "_[0-9]+" | sed 's/\,.*$//' > .$CONTEXT.cache.tmp); }
+        then
+            mv .$CONTEXT.cache.tmp .$CONTEXT.cache 2> /dev/null
+            genInkscapeCmdsFiltered $CONTEXT $1 | java SplitJob $INKSCAPE --shell
+        else
+            echo "Failed creating creating object-ID cache for $CONTEXT.svg"
+        fi
+    done
+else
     for CONTEXT in ${TYPES[@]}
     do
         # Only render out the icons if the svg-file has been modified
@@ -74,6 +115,7 @@ do
             echo "No changes to $CONTEXT.svg, skipping..."
         fi
     done
+fi
     
 # Remove all empty directories from the theme folder.
 find $THEMEDIR -type d -empty -delete