Add adaptive fonts synthesis option

plugins/de.cau.cs.kieler.sccharts.ui/META-INF/services/de.cau.cs.kieler.sccharts.ui.synthesis.hooks.SynthesisHook

@@ -15,4 +15,5 @@ de.cau.cs.kieler.sccharts.ui.synthesis.hooks.InducedDataflowHook
 de.cau.cs.kieler.sccharts.ui.synthesis.hooks.ShowStateDependencyHook
 de.cau.cs.kieler.sccharts.ui.synthesis.hooks.ActionsAsDataflowHook
 de.cau.cs.kieler.sccharts.ui.debug.hooks.SetBreakpointActionHook
-de.cau.cs.kieler.sccharts.ui.synthesis.hooks.ModelOrderHook
+de.cau.cs.kieler.sccharts.ui.synthesis.hooks.ModelOrderHook
+de.cau.cs.kieler.sccharts.ui.synthesis.hooks.FontSizeHook

plugins/de.cau.cs.kieler.sccharts.ui/src/de/cau/cs/kieler/sccharts/ui/synthesis/hooks/FontSizeHook.xtend

@@ -0,0 +1,97 @@
+/*
+ * KIELER - Kiel Integrated Environment for Layout Eclipse RichClient
+ *
+ * http://rtsys.informatik.uni-kiel.de/kieler
+ * 
+ * Copyright ${year} by
+ * + Kiel University
+ *   + Department of Computer Science
+ *     + Real-Time and Embedded Systems Group
+ * 
+ * This code is provided under the terms of the Eclipse Public License (EPL).
+ */
+package de.cau.cs.kieler.sccharts.ui.synthesis.hooks
+
+import com.google.inject.Inject
+import de.cau.cs.kieler.klighd.SynthesisOption
+import de.cau.cs.kieler.klighd.kgraph.KNode
+import de.cau.cs.kieler.klighd.krendering.KRendering
+import de.cau.cs.kieler.klighd.krendering.KText
+import de.cau.cs.kieler.klighd.krendering.ViewSynthesisShared
+import de.cau.cs.kieler.klighd.krendering.extensions.KRenderingExtensions
+import de.cau.cs.kieler.sccharts.State
+import de.cau.cs.kieler.sccharts.extensions.SCChartsControlflowRegionExtensions
+import de.cau.cs.kieler.sccharts.extensions.SCChartsDataflowRegionExtensions
+import de.cau.cs.kieler.sccharts.extensions.SCChartsScopeExtensions
+import de.cau.cs.kieler.sccharts.extensions.SCChartsStateExtensions
+import de.cau.cs.kieler.sccharts.ui.synthesis.GeneralSynthesisOptions
+
+/**
+ * @author mka
+ *
+ */
+ @ViewSynthesisShared
+class FontSizeHook extends SynthesisHook {
+
+    @Inject extension SCChartsControlflowRegionExtensions
+    @Inject extension SCChartsDataflowRegionExtensions
+    @Inject extension SCChartsScopeExtensions
+    @Inject extension SCChartsStateExtensions
+    @Inject extension KRenderingExtensions
+
+    /** Action ID */
+    public static final String ID = "de.cau.cs.kieler.sccharts.ui.synthesis.hooks.FontSizeHook";
+
+    public static final SynthesisOption ADAPTIVE_FONTS = 
+        SynthesisOption.createCheckOption("Adaptive Fonts", false)
+            .setCategory(GeneralSynthesisOptions::NAVIGATION)
+
+    static final int SIMPLE_STATE_FONT_SIZE = 11
+
+    static final double SIMPLE_STATE_INCREASE_FACTOR = 0.5
+
+    static final int MACRO_STATE_FONT_SIZE = 11
+
+    static final double MACRO_STATE_INCREASE_FACTOR = 1.0
+
+    static final int MAX_FONT_INCREASE = 15
+
+
+    /** Checks if given state should be visualized as macro state */
+    def boolean isMacroState(State state) {
+        return state.controlflowRegionsContainStates || state.containsDataflowRegions || !state.actions.empty ||
+            !state.declarations.empty || state.isReferencing || state.hasBaseStates;
+    }
+
+    /** returns a new font size based on the base size and the number of siblings
+     *  crowded (many siblings) layouts get a larger font.
+     */
+    def int dynamicFont(int baseSize, int siblingCount, double factor) {
+        return Math.min((baseSize + factor*(siblingCount - 1)).intValue(), (baseSize + factor*(MAX_FONT_INCREASE)).intValue())
+    }
+
+    override getDisplayedSynthesisOptions() {
+        return #[ADAPTIVE_FONTS]
+    }
+
+    override processState(State state, KNode node) {
+
+        if (ADAPTIVE_FONTS.booleanValue && state.parentRegion !== null) {
+
+            val macroFont = dynamicFont(MACRO_STATE_FONT_SIZE, state.parentRegion.states.size, MACRO_STATE_INCREASE_FACTOR)
+            val simpleFont = dynamicFont(SIMPLE_STATE_FONT_SIZE, state.parentRegion.states.size, SIMPLE_STATE_INCREASE_FACTOR)
+
+            if (state.isMacroState) {
+
+                node.data.filter(KRendering).map[it.eAllContents.toList].toList.flatten.forEach[
+                    if (it instanceof KText) it.fontSize = macroFont
+                ]
+            } else  if (state.isSimple) {
+
+                node.eAllContents.filter(KRendering).toList.forEach[
+                    if (it instanceof KText) it.fontSize = simpleFont
+                ]
+            }
+        }
+    }
+}