jscene: fix geometric dispatch of touch events + count padding

include/justui/jscene.h

@@ -79,10 +79,10 @@ void jscene_render(jscene *scene);
      next, and increasing within child index order within each group.
    * For widgets with a stacked layout, only the active child is considered.
 
-   If content_only is set, this function only intersects with the content box.
-   Otherwise, an intersection with the full box (padding, border and margin
-   included) is performed. */
-jwidget *jscene_widget_at(jscene *scene, int x, int y, bool content_only);
+   If exclude_mp is set, this function only intersects with the content and
+   padding box, excluding margins and borders. Otherwise, an intersection with
+   the full box (padding, border and margin included) is performed. */
+jwidget *jscene_widget_at(jscene *scene, int x, int y, bool exclude_mp);
 
 //---
 // Events sent from the scene to the user

include/justui/jwidget.h

@@ -341,6 +341,8 @@ void jwidget_layout(void *scene_root);
 
 /* jwidget_absolute_x(): Absolute x-position of a widget
    jwidget_absolute_y(): Absolute y-position of a widget
+   jwidget_absolute_padding_x(): Absolute x-position of a widget's padding box
+   jwidget_absolute_padding_y(): Absolute y-position of a widget's padding box
    jwidget_absolute_content_x(): Absolute x-position of a widget's content box
    jwidget_absolute_content_y(): Absolute y-position of a widget's content box
 
@@ -348,6 +350,8 @@ void jwidget_layout(void *scene_root);
    with a full-screen scene. */
 int jwidget_absolute_x(void *w);
 int jwidget_absolute_y(void *w);
+int jwidget_absolute_padding_x(void *w);
+int jwidget_absolute_padding_y(void *w);
 int jwidget_absolute_content_x(void *w);
 int jwidget_absolute_content_y(void *w);
 
@@ -361,6 +365,17 @@ int jwidget_absolute_content_y(void *w);
 int jwidget_content_width(void *w);
 int jwidget_content_height(void *w);
 
+/* jwidget_width(): With of a widget's padding box
+   jwidget_height(): Height of a widget's padding box
+
+   These functions return the size of the padding box of a widget, which
+   includes the content and padding. These are the dimensions that appear as
+   the widget's size when there is a background. These dimensions are known
+   only after layout; calling these functions when the layout is not up-to-date
+   will return funny results. */
+int jwidget_padding_width(void *w);
+int jwidget_padding_height(void *w);
+
 /* jwidget_full_width(): Width of a widget's margin box
    jwidget_full_height(): Height of a widget's margin box
 

src/jscene.c

@@ -97,10 +97,10 @@ void jscene_render(jscene *s)
 		jwidget *w =
 			jscene_widget_at(s, s->touch_last_x, s->touch_last_y, true);
 		if(w) {
-			int x1 = jwidget_absolute_content_x(w);
-			int y1 = jwidget_absolute_content_y(w);
-			int x2 = x1 + jwidget_content_width(w) - 1;
-			int y2 = y1 + jwidget_content_height(w) - 1;
+			int x1 = jwidget_absolute_padding_x(w);
+			int y1 = jwidget_absolute_padding_y(w);
+			int x2 = x1 + jwidget_padding_width(w) - 1;
+			int y2 = y1 + jwidget_padding_height(w) - 1;
 			drect_border(x1, y1, x2, y2, C_NONE, 1, C_RED);
 
 			dprint_opt(DWIDTH-1, 0, C_WHITE, C_RED, DTEXT_RIGHT, DTEXT_TOP,
@@ -112,24 +112,31 @@ void jscene_render(jscene *s)
 
 /* Find sub-widget based on w-local coordinates. */
 static jwidget *jscene_widget_at_rec(
-	jwidget *w, int x, int y, bool content_only, bool visible_only)
+	jwidget *w, int x, int y, bool exclude_mp, bool visible_only)
 {
 	if(!w)
 		return NULL;
 	jwidget *found;
 
 	jwidget_geometry const *g = jwidget_geometry_r(w);
+	/* Content box (this is what children's xy are measured against) */
     int xC = g->margin.left + g->border.left + g->padding.left;
-    int yC = w->y + g->margin.top + g->border.top + g->padding.top;
+    int yC = g->margin.top + g->border.top + g->padding.top;
     uint wC = jwidget_content_width(w);
     uint hC = jwidget_content_height(w);
+    /* Padding box */
+    int xP = xC - g->padding.left;
+    int yP = yC - g->padding.top;
+    uint wP = wC + g->padding.left + g->padding.right;
+    uint hP = hC + g->padding.top + g->padding.bottom;
+    /* Full box (implicitly starts at 0,0) */
 	uint wF = jwidget_full_width(w);
 	uint hF = jwidget_full_height(w);
 
 	/* Check if we intersect w at all */
 	bool intersects;
-	if(content_only)
-		intersects = ((uint)(x - xC) < wC) && ((uint)(y - yC) < hC);
+	if(exclude_mp)
+		intersects = ((uint)(x - xP) < wP) && ((uint)(y - yP) < hP);
 	else
 		intersects = (uint)x < wF && (uint)y < hF;
 	if(!intersects)
@@ -141,8 +148,8 @@ static jwidget *jscene_widget_at_rec(
 		if(stack->active < 0)
 			return w;
 		jwidget *child = w->children[stack->active];
-		found = jscene_widget_at_rec(child, x - xC, y - yC, content_only,
-			visible_only);
+		found = jscene_widget_at_rec(child, x - xC - child->x,
+			y - yC - child->y, exclude_mp, visible_only);
 		return found ? found : w;
 	}
 
@@ -150,8 +157,8 @@ static jwidget *jscene_widget_at_rec(
 	for(int k = 0; k < w->child_count; k++) {
 		jwidget *child = w->children[k];
 		if(child->visible >= visible_only && child->floating) {
-			found = jscene_widget_at_rec(child, x - xC, y - yC, content_only,
-				visible_only);
+			found = jscene_widget_at_rec(child, x - xC - child->x,
+				y - yC - child->y, exclude_mp, visible_only);
 			if(found)
 				return found;
 		}
@@ -161,8 +168,8 @@ static jwidget *jscene_widget_at_rec(
 	for(int k = 0; k < w->child_count; k++) {
 		jwidget *child = w->children[k];
 		if(child->visible >= visible_only && !child->floating) {
-			found = jscene_widget_at_rec(child, x - xC, y - yC, content_only,
-				visible_only);
+			found = jscene_widget_at_rec(child, x - xC - child->x,
+				y - yC - child->y, exclude_mp, visible_only);
 			if(found)
 				return found;
 		}
@@ -172,9 +179,9 @@ static jwidget *jscene_widget_at_rec(
 	return w;
 }
 
-jwidget *jscene_widget_at(jscene *scene, int x, int y, bool content_only)
+jwidget *jscene_widget_at(jscene *scene, int x, int y, bool exclude_mp)
 {
-	return jscene_widget_at_rec(&scene->widget, x, y, content_only, true);
+	return jscene_widget_at_rec(&scene->widget, x, y, exclude_mp, true);
 }
 
 //---

src/jwidget.c

@@ -570,13 +570,39 @@ void jwidget_layout(void *root0)
 int jwidget_absolute_x(void *w0)
 {
 	J_CAST(w)
-	return w ? w->x + jwidget_absolute_x(w->parent) : 0;
+	if(!w)
+		return 0;
+	jwidget_geometry const *g = jwidget_geometry_r(w);
+	return jwidget_absolute_content_x(w) -
+		g->padding.left - g->border.left - g->margin.left;
 }
 
 int jwidget_absolute_y(void *w0)
 {
 	J_CAST(w)
-	return w ? w->y + jwidget_absolute_y(w->parent) : 0;
+	if(!w)
+		return 0;
+	jwidget_geometry const *g = jwidget_geometry_r(w);
+	return jwidget_absolute_content_y(w) -
+		g->padding.top - g->border.top - g->margin.top;
+}
+
+int jwidget_absolute_padding_x(void *w0)
+{
+	J_CAST(w)
+	if(!w)
+		return 0;
+	jwidget_geometry const *g = jwidget_geometry_r(w);
+	return jwidget_absolute_content_x(w) - g->padding.left;
+}
+
+int jwidget_absolute_padding_y(void *w0)
+{
+	J_CAST(w)
+	if(!w)
+		return 0;
+	jwidget_geometry const *g = jwidget_geometry_r(w);
+	return jwidget_absolute_content_y(w) - g->padding.top;
 }
 
 int jwidget_absolute_content_x(void *w0)
@@ -617,6 +643,24 @@ int jwidget_content_height(void *w0)
 	            - g->margin.bottom - g->border.bottom - g->padding.bottom;
 }
 
+int jwidget_padding_width(void *w0)
+{
+	J_CAST(w)
+	jwidget_geometry const *g = jwidget_geometry_r(w);
+
+	return w->w - g->margin.left  - g->border.left
+	            - g->margin.right - g->border.right;
+}
+
+int jwidget_padding_height(void *w0)
+{
+	J_CAST(w)
+	jwidget_geometry const *g = jwidget_geometry_r(w);
+
+	return w->h - g->margin.top    - g->border.top
+	            - g->margin.bottom - g->border.bottom;
+}
+
 int jwidget_full_width(void *w0)
 {
 	J_CAST(w)