From f8c678ac53bee5be4005afb19317d2b192525c62 Mon Sep 17 00:00:00 2001
From: Nishi <nishi@nishi.boats>
Date: Mon, 21 Sep 2026 12:41:56 +0900
Subject: [PATCH] ok

---
 include/Mw/Core.h     |  7 +++++++
 include/Mw/Draw.h     |  7 +++++++
 src/core.c            | 27 +++++++++++++++++++++++++++
 src/draw.c            | 32 ++++++++++++++++++++++++++++++++
 src/widget/document.c | 17 +++++------------
 5 files changed, 78 insertions(+), 12 deletions(-)

diff --git a/include/Mw/Core.h b/include/Mw/Core.h
index 61cb085..318a8ca 100644
--- a/include/Mw/Core.h
+++ b/include/Mw/Core.h
@@ -390,6 +390,13 @@ MWDECL void MWAPI MwFreeWidget(MwWidget handle);
  */
 MWDECL void MWAPI MwGetFrame(MwWidget handle, MwRect* rect);
 
+/*!
+ * @brief Gets the clipping frame of the widget
+ * @param handle Widget
+ * @param rect Frame
+ */
+MWDECL void MWAPI MwGetClipFrame(MwWidget handle, MwRect* rect);
+
 #ifdef _MILSKO
 MWDECL void MwForceRender_Internal(MwWidget handle);
 MWDECL void MwForceRender2_Internal(MwWidget handle, void* ptr);
diff --git a/include/Mw/Draw.h b/include/Mw/Draw.h
index ad13c60..12d3d45 100644
--- a/include/Mw/Draw.h
+++ b/include/Mw/Draw.h
@@ -220,6 +220,13 @@ MWDECL void MWAPI MwDrawDiamond(MwWidget handle, MwRect* rect, MwLLColor color,
  */
 MWDECL void MWAPI MwDrawCircle(MwWidget handle, MwRect* rect, MwLLColor color, MwLLColor background, int filled);
 
+/*!
+ * @brief Calculate intersect of 2 rectangles
+ * @param a 1st rectangle
+ * @param a 2nd rectangle
+ */
+MWDECL void MwIntersectRect(MwRect* a, const MwRect* b);
+
 /* text.c */
 
 /*!
diff --git a/src/core.c b/src/core.c
index 1403310..7bc7065 100644
--- a/src/core.c
+++ b/src/core.c
@@ -1241,4 +1241,31 @@ void MwGetFrame(MwWidget handle, MwRect* rect) {
 	rect->height = MwGetInteger(handle, MwNheight);
 }
 
+void MwGetClipFrame(MwWidget handle, MwRect* rect) {
+	MwWidget child = handle;
+	MwWidget p     = handle->parent;
+	int	 o_x = 0, o_y = 0;
+
+	rect->x	     = 0;
+	rect->y	     = 0;
+	rect->width  = MwGetInteger(handle, MwNwidth);
+	rect->height = MwGetInteger(handle, MwNheight);
+	while(p != NULL && p->widget_class != MwWindowClass) {
+		MwRect pclip;
+
+		o_x += MwGetInteger(child, MwNx);
+		o_y += MwGetInteger(child, MwNy);
+
+		pclip.x	     = -o_x;
+		pclip.y	     = -o_y;
+		pclip.width  = MwGetInteger(p, MwNwidth);
+		pclip.height = MwGetInteger(p, MwNheight);
+		MwIntersectRect(rect, &pclip);
+		if(rect->width == 0 || rect->height == 0) break;
+
+		child = p;
+		p     = p->parent;
+	}
+}
+
 const char* MwVersionString = MwVERSION;
diff --git a/src/draw.c b/src/draw.c
index ab4c9cb..b2ab8b1 100644
--- a/src/draw.c
+++ b/src/draw.c
@@ -1125,3 +1125,35 @@ MwLLPixmap MwLoadXPM(MwWidget handle, char** data) {
 
 	return px;
 }
+
+static int _min(int a, int b) {
+	return a < b ? a : b;
+}
+
+static int _max(int a, int b) {
+	return a > b ? a : b;
+}
+
+void MwIntersectRect(MwRect* a, const MwRect* b) {
+	int x;
+	int y;
+	int right;
+	int bottom;
+
+	x      = _max(a->x, b->x);
+	y      = _max(a->y, b->y);
+	right  = _min(a->x + a->width, b->x + b->width);
+	bottom = _min(a->y + a->height, b->y + b->height);
+
+	a->x = x;
+	a->y = y;
+
+	if(right <= x || bottom <= x) {
+		a->width  = 0;
+		a->height = 0;
+		return;
+	}
+
+	a->width  = right - x;
+	a->height = bottom - y;
+}
diff --git a/src/widget/document.c b/src/widget/document.c
index f71e1bc..eb5233d 100644
--- a/src/widget/document.c
+++ b/src/widget/document.c
@@ -59,17 +59,9 @@ static void draw(MwWidget handle) {
 	MwFLFont   font = NULL;
 	MwPoint	   u_p, s_p, c_p;
 	int	   u = 0, s = 0, c = 0;
-	int	   s_y = 0;
-	int	   s_h = MwGetInteger(handle, MwNheight);
-	MwWidget   p   = handle->parent;
+	MwRect	   clip;
 
-	s_y = MwGetInteger(handle, MwNy);
-	while(p != NULL && p->widget_class != MwWindowClass) {
-		s_y += MwGetInteger(p, MwNy);
-
-		p = p->parent;
-	}
-	s_y *= -1;
+	MwGetClipFrame(handle, &clip);
 
 	u_p.x = s_p.x = c_p.x = 0;
 	u_p.y = s_p.y = c_p.y = 0;
@@ -87,11 +79,12 @@ static void draw(MwWidget handle) {
 		case MwDOCUMENT_TEXT:
 		{
 			MwPoint p;
+			int	th2;
 
 			p.x = l->x;
-			p.y = l->y + MwTextHeight(handle, font, l->text) / 2;
+			p.y = l->y + (th2 = MwTextHeight(handle, font, l->text) / 2);
 
-			if(p.y <= s_y || p.y >= s_y + s_h) break;
+			if((p.y + th2) <= clip.y || (p.y - th2) >= clip.y + clip.height) break;
 
 			if(u || s || c) {
 				MwPoint line[2];