From dce550da0d04eb3364ed82ccff28b92cbec6b1c8 Mon Sep 17 00:00:00 2001
From: Speiger <Speiger@gmx.net>
Date: Thu, 23 Jan 2025 10:20:02 +0100
Subject: [PATCH] New weighted constrained

---
 .../speiger/src/coreengine/NewInputTest.java  |  4 +-
 .../gui/components/base/GuiComponent.java     | 18 +++-
 .../constraints/ConstrainedContext.java       | 89 +++++++++++++++++++
 .../constraints/ConstraintContainer.java      | 15 +++-
 .../gui/layout/constraints/Constraints.java   | 70 +++++++++++++--
 .../gui/layout/constraints/IConstraint.java   | 16 +++-
 6 files changed, 194 insertions(+), 18 deletions(-)
 create mode 100644 src/main/java/speiger/src/coreengine/rendering/gui/layout/constraints/ConstrainedContext.java

diff --git a/src/main/java/speiger/src/coreengine/NewInputTest.java b/src/main/java/speiger/src/coreengine/NewInputTest.java
index a6846dc..e79f656 100644
--- a/src/main/java/speiger/src/coreengine/NewInputTest.java
+++ b/src/main/java/speiger/src/coreengine/NewInputTest.java
@@ -18,10 +18,10 @@ import speiger.src.coreengine.math.vector.matrix.Matrix4f;
 import speiger.src.coreengine.rendering.gui.font.Font;
 import speiger.src.coreengine.rendering.gui.font.FontManager;
 import speiger.src.coreengine.rendering.gui.font.glyth.Glyth;
-import speiger.src.coreengine.rendering.gui.font.glyth.UnbakedGlyth;
-import speiger.src.coreengine.rendering.gui.font.glyth.UnbakedGlyth.GlythBaker;
 import speiger.src.coreengine.rendering.gui.font.glyth.IGlythSheetInfo;
 import speiger.src.coreengine.rendering.gui.font.glyth.MissingGlyth;
+import speiger.src.coreengine.rendering.gui.font.glyth.UnbakedGlyth;
+import speiger.src.coreengine.rendering.gui.font.glyth.UnbakedGlyth.GlythBaker;
 import speiger.src.coreengine.rendering.gui.font.providers.IFontProvider;
 import speiger.src.coreengine.rendering.gui.font.providers.STBTrueTypeProvider;
 import speiger.src.coreengine.rendering.input.devices.FileDrop;
diff --git a/src/main/java/speiger/src/coreengine/rendering/gui/components/base/GuiComponent.java b/src/main/java/speiger/src/coreengine/rendering/gui/components/base/GuiComponent.java
index 9990b4f..9fa02e5 100644
--- a/src/main/java/speiger/src/coreengine/rendering/gui/components/base/GuiComponent.java
+++ b/src/main/java/speiger/src/coreengine/rendering/gui/components/base/GuiComponent.java
@@ -5,6 +5,7 @@ import java.util.function.Consumer;
 
 import speiger.src.collections.objects.lists.ObjectArrayList;
 import speiger.src.coreengine.rendering.gui.animation.GuiAnimator;
+import speiger.src.coreengine.rendering.gui.layout.constraints.ConstrainedContext;
 import speiger.src.coreengine.rendering.gui.layout.constraints.ConstraintContainer;
 import speiger.src.coreengine.rendering.gui.renderer.IUIRenderer;
 import speiger.src.coreengine.rendering.guiOld.helper.box.IGuiBox;
@@ -21,6 +22,7 @@ public abstract non-sealed class GuiComponent extends FlagObject implements ICas
 	final IGuiBox box;
 	IComponentScreen screen;
 	ConstraintContainer constraints;
+	ConstrainedContext constraintedContext = new ConstrainedContext();
 	GuiAnimator animator;
 	GuiComponent parent;
 	List<GuiComponent> children = new ObjectArrayList<>();
@@ -102,12 +104,20 @@ public abstract non-sealed class GuiComponent extends FlagObject implements ICas
 		return true;
 	}
 	
+	private ConstrainedContext parentContext() {
+		return parent != null ? parent.constraintedContext : null;
+	}
+	
 	public GuiComponent withConstraints(ConstraintContainer container) {
 		this.constraints = container;
-		if((screen != null || parent != null) && constraints != null) constraints.apply(this, parent);
+		if((screen != null || parent != null) && constraints != null) constraints.apply(this, parent, parentContext());
 		return this;
 	}
 	
+	public ConstraintContainer constraint() {
+		return constraints;
+	}
+	
 	public GuiComponent addChild(GuiComponent child) {
 		if(child.parent != null) throw new IllegalArgumentException("A Child can not have multiple parents");
 		child.parent = this;
@@ -155,13 +165,16 @@ public abstract non-sealed class GuiComponent extends FlagObject implements ICas
 	}
 	
 	public void onChanged(boolean repaint) {
-		if(constraints != null) constraints.apply(this, parent);
+		if(constraints != null) constraints.apply(this, parent, parentContext());
 		if(animator != null) animator.apply();
 		box.onChanged();
+		constraintedContext.update(this, children);
 		notifyListeners(LISTENER_ON_CHANGE);
 		if(repaint) repaint();
 		if(children.isEmpty()) return;
+		int index = 0;
 		for(GuiComponent comp : children) {
+			constraintedContext.setCurrent(index++);
 			comp.onChanged(repaint);
 		}
 	}
@@ -173,6 +186,7 @@ public abstract non-sealed class GuiComponent extends FlagObject implements ICas
 	public IGuiBox getBox() { return box; }
 	public IInteractable interactContainer() { return interactions; }
 	
+	
 	@Override
 	public GuiComponent set(float x, float y) {
 		if(box.getBaseX() != x || box.getBaseY() != y) {
diff --git a/src/main/java/speiger/src/coreengine/rendering/gui/layout/constraints/ConstrainedContext.java b/src/main/java/speiger/src/coreengine/rendering/gui/layout/constraints/ConstrainedContext.java
new file mode 100644
index 0000000..a2f6c61
--- /dev/null
+++ b/src/main/java/speiger/src/coreengine/rendering/gui/layout/constraints/ConstrainedContext.java
@@ -0,0 +1,89 @@
+package speiger.src.coreengine.rendering.gui.layout.constraints;
+
+import java.util.List;
+
+import speiger.src.coreengine.rendering.gui.components.base.GuiComponent;
+import speiger.src.coreengine.rendering.guiOld.helper.box.IGuiBox;
+
+public class ConstrainedContext {
+	float[] bounds;
+	float[] weights;
+	boolean locked = false;
+	int current;
+	
+	public void update(GuiComponent owner, List<GuiComponent> children) {
+		locked = false;
+		bounds = new float[children.size()*2];
+		weights = new float[children.size()*2];
+		for(int i = 0,m=children.size();i<m;i++) {
+			current = i;
+			GuiComponent component = children.get(i);
+			if(component.constraint() == null) {
+				applyDefault(component);
+				continue;
+			}
+			component.constraint().fetch(component, owner, this);
+		}
+		locked = true;
+		float[] totals = new float[4];
+		for(int i = 0,m=children.size();i<m;i++) {
+			totals[0] += bounds[i*2];
+			totals[1] += bounds[i*2+1];
+			totals[2] += weights[i*2];
+			totals[3] += weights[i*2+1];
+		}
+		IGuiBox box = owner.getBox();
+		totals[0] -= box.getBaseWidth();
+		totals[1] -= box.getBaseHeight();
+		if(totals[2] > 0F) {
+			float scale = 1F / totals[2];
+			for(int i = 0,m=children.size();i<m;i++) {
+				float value = weights[i*2];
+				if(value <= 0F) continue;
+				bounds[i*2] = value * scale;
+			}
+		}
+		if(totals[3] > 0F) {
+			float scale = 1F / totals[3];
+			for(int i = 0,m=children.size();i<m;i++) {
+				float value = weights[i*2+1];
+				if(value <= 0) continue;
+				bounds[i*2+1] = value * scale;
+			}
+		}
+	}
+	
+	public void setCurrent(int index) {
+		if(!locked) throw new IllegalStateException("Cursor can only be moved when its in read mode!");
+		current = index;
+	}
+	
+	public float getOffset(boolean width) {
+		if(!locked) throw new IllegalStateException("You can't read during write!");
+		float total = 0F;
+		for(int i = 0;i<current;i++) {
+			total += bounds[i*2+(width ? 0 : 1)];
+		}
+		return total;
+	}
+	
+	public float get(boolean width) {
+		if(!locked) throw new IllegalStateException("You can't read during write!");
+		return bounds[current*2+(width ? 0 : 1)];
+	}
+	
+	private void applyDefault(GuiComponent component) {
+		addBound(component.getWidth(), true);
+		addBound(component.getHeight(), true);
+	}
+	
+	public void addWeight(float weight, boolean width) {
+		if(locked) return;
+		weights[current*2+(width ? 0 : 1)] = weight;
+	}
+	
+	public void addBound(float bound, boolean width) {
+		if(locked) return;
+		bounds[current*2+(width ? 0 : 1)] = bound;
+	}
+}
diff --git a/src/main/java/speiger/src/coreengine/rendering/gui/layout/constraints/ConstraintContainer.java b/src/main/java/speiger/src/coreengine/rendering/gui/layout/constraints/ConstraintContainer.java
index 0e6d927..6808599 100644
--- a/src/main/java/speiger/src/coreengine/rendering/gui/layout/constraints/ConstraintContainer.java
+++ b/src/main/java/speiger/src/coreengine/rendering/gui/layout/constraints/ConstraintContainer.java
@@ -9,10 +9,21 @@ public class ConstraintContainer {
 	
 	private ConstraintContainer() {}
 	
-	public void apply(GuiComponent owner, GuiComponent parent) {
+	public void apply(GuiComponent owner, GuiComponent parent, ConstrainedContext context) {
 		for(int i = 0;i<4;i++) {
 			if(constraints[i] == null) continue;
-			constraints[i].apply(owner, parent, Target.by(i));
+			constraints[i].apply(owner, parent, Target.by(i), context);
+		}
+	}
+	
+	public void fetch(GuiComponent owner, GuiComponent parent, ConstrainedContext context) {
+		for(int i = 2;i<CONSTRAINT_LENGTH;i++) {
+			Target target = Target.by(i);
+			if(constraints[i] == null) {
+				context.addBound(target.get(owner), target.isXAxis());
+				continue;
+			}
+			constraints[i].fetch(owner, parent, target, context);
 		}
 	}
 	
diff --git a/src/main/java/speiger/src/coreengine/rendering/gui/layout/constraints/Constraints.java b/src/main/java/speiger/src/coreengine/rendering/gui/layout/constraints/Constraints.java
index f9f3a94..3741ce6 100644
--- a/src/main/java/speiger/src/coreengine/rendering/gui/layout/constraints/Constraints.java
+++ b/src/main/java/speiger/src/coreengine/rendering/gui/layout/constraints/Constraints.java
@@ -14,9 +14,13 @@ public class Constraints {
 		public static Pixels inverted(float value) { return new Pixels(value, true); }
 		
 		@Override
-		public void apply(IGuiBox owner, IGuiBox parent, Target target) {
+		public void apply(IGuiBox owner, IGuiBox parent, Target target, ConstrainedContext context) {
 			target.set(owner, inverted ? target.asArea().get(parent) - value : value);
 		}
+		@Override
+		public void fetch(IGuiBox owner, IGuiBox parent, Target target, ConstrainedContext context) {
+			context.addBound(inverted ? target.asArea().get(parent) - value : value, target.isXAxis());
+		}
 	}
 	
 	public static record Parent(float padding, boolean inv) implements ISimpleConstraint {
@@ -27,10 +31,16 @@ public class Constraints {
 		public static Parent inverted(float padding) { return new Parent(padding, true); }
 		
 		@Override
-		public void apply(IGuiBox owner, IGuiBox parent, Target target) {
+		public void apply(IGuiBox owner, IGuiBox parent, Target target, ConstrainedContext context) {
 			if(inv) target.set(owner, target.isPosition() ? target.asArea().get(parent) - padding : padding * 2);
 			else target.set(owner, target.isPosition() ? padding : target.get(parent) - padding * 2);
 		}
+		
+		@Override
+		public void fetch(IGuiBox owner, IGuiBox parent, Target target, ConstrainedContext context) {
+			if(inv) context.addBound(target.isPosition() ? target.asArea().get(parent) - padding : padding * 2, target.isXAxis());
+			else context.addBound(target.isPosition() ? padding : target.get(parent) - padding * 2, target.isXAxis());
+		}
 	}
 	
 	public static record Children(float padding, boolean includeChildOffsets) implements ISimpleConstraint {
@@ -41,17 +51,27 @@ public class Constraints {
 		public static Children withPos(float padding) { return new Children(padding, true); }
 		
 		@Override
-		public void apply(IGuiBox owner, IGuiBox parent, Target target) {
+		public void apply(IGuiBox owner, IGuiBox parent, Target target, ConstrainedContext context) {
 			if(target.isPosition()) return;
 			float value = 0F;
 			List<IGuiBox> children = owner.children();
 			for(int i = 0,m=children.size();i<m;i++) {
 				IGuiBox child = children.get(i);
-				//TODO Fix this. Shouldn't this be width + offset instead of offset + width?
-				value = Math.max(value, child.getBaseX() + (includeChildOffsets() ? child.getBaseWidth() : 0));
+				value = Math.max(value, child.getBaseWidth() + (includeChildOffsets() ? child.getBaseX() : 0));
 			}
 			target.set(owner, value);
 		}
+		
+		@Override
+		public void fetch(IGuiBox owner, IGuiBox parent, Target target, ConstrainedContext context) {
+			float value = 0F;
+			List<IGuiBox> children = owner.children();
+			for(int i = 0,m=children.size();i<m;i++) {
+				IGuiBox child = children.get(i);
+				value = Math.max(value, child.getBaseWidth() + (includeChildOffsets() ? child.getBaseX() : 0));
+			}
+			context.addBound(value, target.isXAxis());
+		}
 	}
 	
 	public static record Relative(float value, float padding) implements ISimpleConstraint {
@@ -60,9 +80,30 @@ public class Constraints {
 		public static Relative of(float value, float padding) { return new Relative(value, padding); }
 		
 		@Override
-		public void apply(IGuiBox owner, IGuiBox parent, Target target) {
+		public void apply(IGuiBox owner, IGuiBox parent, Target target, ConstrainedContext context) {
 			target.set(owner, value * (target.asArea().get(parent) - padding));
 		}
+		
+		@Override
+		public void fetch(IGuiBox owner, IGuiBox parent, Target target, ConstrainedContext context) {
+			context.addBound(value * (target.asArea().get(parent) - padding), target.isXAxis());
+		}
+	}
+	
+	public static record Weighted(float weight) implements ISimpleConstraint {
+		public static Weighted of(float weight) { return new Weighted(weight); }
+		
+		@Override
+		public void apply(IGuiBox owner, IGuiBox parent, Target target, ConstrainedContext context) {
+			target.set(owner, target.get(context));
+		}
+
+		@Override
+		public void fetch(IGuiBox owner, IGuiBox parent, Target target, ConstrainedContext context) {
+			if(target.isPosition()) return;
+			context.addWeight(weight, target.isXAxis());
+		}
+		
 	}
 	
 	public static record Center() implements ISimpleConstraint {
@@ -71,18 +112,29 @@ public class Constraints {
 		public static Center of() { return INSTANCE; }
 		
 		@Override
-		public void apply(IGuiBox owner, IGuiBox parent, Target target) {
+		public void apply(IGuiBox owner, IGuiBox parent, Target target, ConstrainedContext context) {
 			Target bounds = target.asArea();
 			target.set(owner, (bounds.get(parent) * 0.5F) - (bounds.get(owner) * 0.5F));
 		}
+
+		@Override
+		public void fetch(IGuiBox owner, IGuiBox parent, Target target, ConstrainedContext context) {
+			context.addBound(target.get(owner), target.isXAxis());
+		}
 	}
 	
 	public static record Conditional(BooleanSupplier supplier, IConstraint onTrue, IConstraint onFalse) implements IConstraint {
 		public static Conditional of(BooleanSupplier supplier, IConstraint onTrue, IConstraint onFalse) { return new Conditional(supplier, onTrue, onFalse); }
 		
 		@Override
-		public void apply(GuiComponent owner, GuiComponent parent, Target target) {
-			(supplier.getAsBoolean() ? onTrue : onFalse).apply(owner, parent, target);
+		public void apply(GuiComponent owner, GuiComponent parent, Target target, ConstrainedContext context) {
+			(supplier.getAsBoolean() ? onTrue : onFalse).apply(owner, parent, target, context);
+		}
+
+		@Override
+		public void fetch(GuiComponent owner, GuiComponent parent, Target target, ConstrainedContext context) {
+			(supplier.getAsBoolean() ? onTrue : onFalse).fetch(owner, parent, target, context);
+			
 		}
 	}
 }
diff --git a/src/main/java/speiger/src/coreengine/rendering/gui/layout/constraints/IConstraint.java b/src/main/java/speiger/src/coreengine/rendering/gui/layout/constraints/IConstraint.java
index 9e1702f..c782b19 100644
--- a/src/main/java/speiger/src/coreengine/rendering/gui/layout/constraints/IConstraint.java
+++ b/src/main/java/speiger/src/coreengine/rendering/gui/layout/constraints/IConstraint.java
@@ -9,10 +9,12 @@ import speiger.src.coreengine.rendering.gui.layout.constraints.Constraints.Condi
 import speiger.src.coreengine.rendering.gui.layout.constraints.Constraints.Parent;
 import speiger.src.coreengine.rendering.gui.layout.constraints.Constraints.Pixels;
 import speiger.src.coreengine.rendering.gui.layout.constraints.Constraints.Relative;
+import speiger.src.coreengine.rendering.gui.layout.constraints.Constraints.Weighted;
 import speiger.src.coreengine.rendering.guiOld.helper.box.IGuiBox;
 
 public interface IConstraint {
-	public void apply(GuiComponent owner, GuiComponent child, Target target);
+	public void apply(GuiComponent owner, GuiComponent parent, Target target, ConstrainedContext context);
+	public void fetch(GuiComponent owner, GuiComponent parent, Target target, ConstrainedContext context);
 	
 	public static IConstraint pixels(float value) { return Pixels.of(value); }
 	public static IConstraint pixelsInv(float value) { return Pixels.inverted(value); }
@@ -30,13 +32,19 @@ public interface IConstraint {
 	public static IConstraint relative(float value) { return Relative.of(value); }
 	public static IConstraint relative(float value, float padding) { return Relative.of(value, padding); }
 	
+	public static IConstraint weighted(float weight) { return Weighted.of(weight); }
+	
 	public static IConstraint center() { return Center.of(); }
 	public static IConstraint conditional(BooleanSupplier supplier, IConstraint onTrue, IConstraint onFalse) { return Conditional.of(supplier, onTrue, onFalse); }
 	
 	public static interface ISimpleConstraint extends IConstraint {
 		@Override
-		default void apply(GuiComponent owner, GuiComponent parent, Target target) { apply(owner.getBox(), parent == null ? owner.screen().getBox() : parent.getBox(), target); }
-		public void apply(IGuiBox owner, IGuiBox parent, Target target);
+		default void apply(GuiComponent owner, GuiComponent parent, Target target, ConstrainedContext context) { apply(owner.getBox(), parent == null ? owner.screen().getBox() : parent.getBox(), target, context); }
+		public void apply(IGuiBox owner, IGuiBox parent, Target target, ConstrainedContext context);
+		
+		@Override
+		default void fetch(GuiComponent owner, GuiComponent parent, Target target, ConstrainedContext context) { fetch(owner.getBox(), parent == null ? owner.screen().getBox() : parent.getBox(), target, context); }
+		public void fetch(IGuiBox owner, IGuiBox parent, Target target, ConstrainedContext context);
 	}
 	
 	public static enum Target {
@@ -51,6 +59,7 @@ public interface IConstraint {
 		public static Target pos(boolean x) { return x ? X : Y; }
 		public static Target bounds(boolean x) { return x ? WIDTH : HEIGHT; }
 		public boolean isPosition() { return this == X || this == Y; }
+		public boolean isXAxis() { return this == X || this == WIDTH; }
 		public Target asArea() {
 			return switch(this) {
 				case X -> WIDTH;
@@ -61,6 +70,7 @@ public interface IConstraint {
 		
 		public float get(GuiComponent comp) { return get(comp.getBox()); }
 		public void set(GuiComponent comp, float value) { set(comp.getBox(), value); }
+		public float get(ConstrainedContext context) { return (isPosition() ? context.getOffset(isXAxis()) : context.get(isXAxis())); }
 		
 		public float get(IGuiBox box) {
 			return switch(this) {