skins2: improve refresh of layouts

[vlc] / modules / gui / skins2 / utils / pointer.hpp

diff --git a/modules/gui/skins2/utils/pointer.hpp b/modules/gui/skins2/utils/pointer.hpp
index 4d2aa29c25b9e6bb1bbcceab46d27c5c21591215..2a7e815210c2ee832df7f41cfab0e524e96fb1ff 100644 (file)
--- a/modules/gui/skins2/utils/pointer.hpp
+++ b/modules/gui/skins2/utils/pointer.hpp
@@ -93,4 +93,110 @@ private:
 };
 
 
+class rect
+{
+public:
+    rect( int v_x = 0, int v_y = 0, int v_width = 0, int v_height = 0 )
+        : x( v_x ), y( v_y ), width( v_width ), height( v_height ) { }
+    ~rect() { }
+    int x;
+    int y;
+    int width;
+    int height;
+
+    // rect2 fully included in rect1
+    static bool isIncluded( rect& rect2, rect& rect1 )
+    {
+        int x1 = rect1.x;
+        int y1 = rect1.y;
+        int w1 = rect1.width;
+        int h1 = rect1.height;
+
+        int x2 = rect2.x;
+        int y2 = rect2.y;
+        int w2 = rect2.width;
+        int h2 = rect2.height;
+
+        return     x2 >= x1 && x2 < x1 + w1
+               &&  y2 >= y1 && y2 < y1 + h1
+               &&  w2 <= w1
+               &&  h2 <= h1;
+    }
+
+    static bool areDisjunct( rect& rect2, rect& rect1 )
+    {
+        int x1 = rect1.x;
+        int y1 = rect1.y;
+        int w1 = rect1.width;
+        int h1 = rect1.height;
+
+        int x2 = rect2.x;
+        int y2 = rect2.y;
+        int w2 = rect2.width;
+        int h2 = rect2.height;
+
+        return    y2 + h2 -1 < y1  // rect2 above rect1
+               || y2 > y1 + h1 - 1  // rect2 under rect1
+               || x2 > x1 + w1 -1  // rect2 right of rect1
+               || x2 + w2 - 1 < x1; // rect2 left of rect1
+    }
+
+    static bool intersect( rect& rect1, rect& rect2, rect* pRect )
+    {
+        int x1 = rect1.x;
+        int y1 = rect1.y;
+        int w1 = rect1.width;
+        int h1 = rect1.height;
+
+        int x2 = rect2.x;
+        int y2 = rect2.y;
+        int w2 = rect2.width;
+        int h2 = rect2.height;
+
+        if( areDisjunct( rect1, rect2 ) )
+            return false;
+        else
+        {
+            int left = max( x1, x2 );
+            int right = min( x1 + w1 - 1, x2 + w2 - 1 );
+            int top = max( y1, y2 );
+            int bottom = min( y1 + h1 - 1, y2 + h2 -1 );
+            pRect->x = left;
+            pRect->y = top;
+            pRect->width = right - left + 1;
+            pRect->height = bottom - top + 1;
+
+            return pRect->width > 0 && pRect->height > 0;
+        }
+    }
+
+    static bool join( rect& rect1, rect& rect2, rect* pRect )
+    {
+        int x1 = rect1.x;
+        int y1 = rect1.y;
+        int w1 = rect1.width;
+        int h1 = rect1.height;
+
+        int x2 = rect2.x;
+        int y2 = rect2.y;
+        int w2 = rect2.width;
+        int h2 = rect2.height;
+
+        int left = min( x1, x2 );
+        int right = max( x1 + w1 - 1, x2 + w2 - 1 );
+        int top = min( y1, y2 );
+        int bottom = max( y1 + h1 - 1, y2 + h2 -1 );
+        pRect->x = left;
+        pRect->y = top;
+        pRect->width = right - left + 1;
+        pRect->height = bottom - top + 1;
+
+        return pRect->width > 0 && pRect->height > 0;
+    }
+    static int min( int x, int y ) { return x < y ? x : y; }
+    static int max( int x, int y ) { return x < y ? y : x; }
+
+};
+
+
 #endif