Mon 21 Jul 22:43:21 CEST 2025

js/ui/mxgraph/src/js/util/mxDivResizer.js

@@ -0,0 +1,151 @@
+/**
+ * Copyright (c) 2006-2015, JGraph Ltd
+ * Copyright (c) 2006-2015, Gaudenz Alder
+ */
+/**
+ * Class: mxDivResizer
+ * 
+ * Maintains the size of a div element in Internet Explorer. This is a
+ * workaround for the right and bottom style being ignored in IE.
+ * 
+ * If you need a div to cover the scrollwidth and -height of a document,
+ * then you can use this class as follows:
+ * 
+ * (code)
+ * var resizer = new mxDivResizer(background);
+ * resizer.getDocumentHeight = function()
+ * {
+ *   return document.body.scrollHeight;
+ * }
+ * resizer.getDocumentWidth = function()
+ * {
+ *   return document.body.scrollWidth;
+ * }
+ * resizer.resize();
+ * (end)
+ * 
+ * Constructor: mxDivResizer
+ * 
+ * Constructs an object that maintains the size of a div
+ * element when the window is being resized. This is only
+ * required for Internet Explorer as it ignores the respective
+ * stylesheet information for DIV elements.
+ * 
+ * Parameters:
+ * 
+ * div - Reference to the DOM node whose size should be maintained.
+ * container - Optional Container that contains the div. Default is the
+ * window.
+ */
+function mxDivResizer(div, container)
+{
+	if (div.nodeName.toLowerCase() == 'div')
+	{
+		if (container == null)
+		{
+			container = window;
+		}
+
+		this.div = div;
+		var style = mxUtils.getCurrentStyle(div);
+		
+		if (style != null)
+		{
+			this.resizeWidth = style.width == 'auto';
+			this.resizeHeight = style.height == 'auto';
+		}
+		
+		mxEvent.addListener(container, 'resize',
+			mxUtils.bind(this, function(evt)
+			{
+				if (!this.handlingResize)
+				{
+					this.handlingResize = true;
+					this.resize();
+					this.handlingResize = false;
+				}
+			})
+		);
+		
+		this.resize();
+	}
+};
+
+/**
+ * Function: resizeWidth
+ * 
+ * Boolean specifying if the width should be updated.
+ */
+mxDivResizer.prototype.resizeWidth = true;
+
+/**
+ * Function: resizeHeight
+ * 
+ * Boolean specifying if the height should be updated.
+ */
+mxDivResizer.prototype.resizeHeight = true;
+
+/**
+ * Function: handlingResize
+ * 
+ * Boolean specifying if the width should be updated.
+ */
+mxDivResizer.prototype.handlingResize = false;
+
+/**
+ * Function: resize
+ * 
+ * Updates the style of the DIV after the window has been resized.
+ */
+mxDivResizer.prototype.resize = function()
+{
+	var w = this.getDocumentWidth();
+	var h = this.getDocumentHeight();
+
+	var l = parseInt(this.div.style.left);
+	var r = parseInt(this.div.style.right);
+	var t = parseInt(this.div.style.top);
+	var b = parseInt(this.div.style.bottom);
+	
+	if (this.resizeWidth &&
+		!isNaN(l) &&
+		!isNaN(r) &&
+		l >= 0 &&
+		r >= 0 &&
+		w - r - l > 0)
+	{
+		this.div.style.width = (w - r - l)+'px';
+	}
+	
+	if (this.resizeHeight &&
+		!isNaN(t) &&
+		!isNaN(b) &&
+		t >= 0 &&
+		b >= 0 &&
+		h - t - b > 0)
+	{
+		this.div.style.height = (h - t - b)+'px';
+	}
+};
+
+/**
+ * Function: getDocumentWidth
+ * 
+ * Hook for subclassers to return the width of the document (without
+ * scrollbars).
+ */
+mxDivResizer.prototype.getDocumentWidth = function()
+{
+	return document.body.clientWidth;
+};
+
+/**
+ * Function: getDocumentHeight
+ * 
+ * Hook for subclassers to return the height of the document (without
+ * scrollbars).
+ */
+mxDivResizer.prototype.getDocumentHeight = function()
+{
+	return document.body.clientHeight;
+};