/* * $Id: LayoutContext.java,v 1.12 2003/03/07 07:58:51 jeremias Exp $ * ============================================================================ * The Apache Software License, Version 1.1 * ============================================================================ * * Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved. * * Redistribution and use in source and binary forms, with or without modifica- * tion, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * 3. The end-user documentation included with the redistribution, if any, must * include the following acknowledgment: "This product includes software * developed by the Apache Software Foundation (http://www.apache.org/)." * Alternately, this acknowledgment may appear in the software itself, if * and wherever such third-party acknowledgments normally appear. * * 4. The names "FOP" and "Apache Software Foundation" must not be used to * endorse or promote products derived from this software without prior * written permission. For written permission, please contact * apache@apache.org. * * 5. Products derived from this software may not be called "Apache", nor may * "Apache" appear in their name, without prior written permission of the * Apache Software Foundation. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU- * DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * ============================================================================ * * This software consists of voluntary contributions made by many individuals * on behalf of the Apache Software Foundation and was originally created by * James Tauber . For more information on the Apache * Software Foundation, please see . */ package org.apache.fop.layoutmgr; import org.apache.fop.traits.MinOptMax; /** * This class is used to pass information to the getNextBreakPoss() * method. It is set up by higher level LM and used by lower level LM. */ public class LayoutContext { /** * Values for flags. */ public static final int LINEBREAK_AT_LF_ONLY = 0x01; /** Generated break possibility is first in a new area */ public static final int NEW_AREA = 0x02; public static final int IPD_UNKNOWN = 0x04; /** Signal to a Line LM that a higher level LM may provoke a change * in the reference area, thus ref area IPD. The LineLM should return * without looking for a line break. */ public static final int CHECK_REF_AREA = 0x08; /** * If this flag is set, it indicates that any leading fo:character * objects with suppress-at-line-break="suppress" should not generate * areas. This is the case at the beginning of each new LineArea * except the first. */ public static final int SUPPRESS_LEADING_SPACE = 0x10; public static final int FIRST_AREA = 0x20; public static final int TRY_HYPHENATE = 0x40; public static final int LAST_AREA = 0x80; public static final int RESOLVE_LEADING_SPACE = 0x100; public int flags; // Contains some set of flags defined above /** * Total available stacking dimension for a "galley-level" layout * manager (Line or Flow). It is passed by the parent LM. For LineLM, * the block LM determines this based on indent properties. * These LM may wish to pass this information down to lower * level LM to allow them to optimize returned break possibilities. */ MinOptMax stackLimit; /** True if current top-level reference area is spanning. */ boolean bIsSpan; /** inline-progression-dimension of nearest ancestor reference area */ int refIPD; /** Current pending space-after or space-end from preceding area */ SpaceSpecifier trailingSpace; /** Current pending space-before or space-start from ancestor areas */ SpaceSpecifier leadingSpace; /** Current hyphenation context. May be null. */ private HyphContext hyphContext = null; /** Stretch or shrink value when making areas. */ private double ipdAdjust = 0.0; /** Stretch or shrink value when adding spaces. */ private double dSpaceAdjust = 0.0; private int iLineHeight; private int iBaseline; public LayoutContext(LayoutContext parentLC) { this.flags = parentLC.flags; this.refIPD = parentLC.refIPD; this.stackLimit = null; // Don't reference parent MinOptMax! this.leadingSpace = parentLC.leadingSpace; //??? this.trailingSpace = parentLC.trailingSpace; //??? this.hyphContext = parentLC.hyphContext; this.dSpaceAdjust = parentLC.dSpaceAdjust; this.iLineHeight = parentLC.iLineHeight; this.iBaseline = parentLC.iBaseline; // Copy other fields as necessary. Use clone??? } public LayoutContext(int flags) { this.flags = flags; this.refIPD = 0; stackLimit = new MinOptMax(0); leadingSpace = null; trailingSpace = null; } public void setFlags(int flags) { setFlags(flags, true); } public void setFlags(int flags, boolean bSet) { if (bSet) { this.flags |= flags; } else { this.flags &= ~flags; } } public void unsetFlags(int flags) { setFlags(flags, false); } public boolean isStart() { return ((this.flags & NEW_AREA) != 0); } public boolean startsNewArea() { return ((this.flags & NEW_AREA) != 0 && leadingSpace != null); } public boolean isFirstArea() { return ((this.flags & FIRST_AREA) != 0); } public boolean isLastArea() { return ((this.flags & LAST_AREA) != 0); } public boolean suppressLeadingSpace() { return ((this.flags & SUPPRESS_LEADING_SPACE) != 0); } public void setLeadingSpace(SpaceSpecifier space) { leadingSpace = space; } public SpaceSpecifier getLeadingSpace() { return leadingSpace; } public boolean resolveLeadingSpace() { return ((this.flags & RESOLVE_LEADING_SPACE) != 0); } 
<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="utf-8">
	<title>jQuery UI Draggable - Handles</title>
	<link rel="stylesheet" href="../../themes/base/jquery.ui.all.css">
	<script src="../../jquery-1.5.1.js"></script>
	<script src="../../ui/jquery.ui.core.js"></script>
	<script src="../../ui/jquery.ui.widget.js"></script>
	<script src="../../ui/jquery.ui.mouse.js"></script>
	<script src="../../ui/jquery.ui.draggable.js"></script>
	<link rel="stylesheet" href="../demos.css">
	<style>
	#draggable, #draggable2 { width: 100px; height: 100px; padding: 0.5em; float: left; margin: 0 10px 10px 0; }
	#draggable p { cursor: move; }
	</style>
	<script>
	$(function() {
		$( "#draggable" ).draggable({ handle: "p" });
		$( "#draggable2" ).draggable({ cancel: "p.ui-widget-header" });
		$( "div, p" ).disableSelection();
	});
	</script>
</head>
<body>

<div class="demo">
	
<div id="draggable" class="ui-widget-content">
	<p class="ui-widget-header">I can be dragged only by this handle</p>
</div>

<div id="draggable2" class="ui-widget-content">
	<p>You can drag me around&hellip;</p>
	<p class="ui-widget-header">&hellip;but you can't drag me by this handle.</p>
</div>

<!-- ADD CANCEL DEMO -->

</div><!-- End demo -->



<div class="demo-description">
<p>Allow dragging only when the cursor is over a specific part of the draggable.  Use the <code>handle</code> option to specify the jQuery selector of an element (or group of elements) used to drag the object.</p>
<p>Or prevent dragging when the cursor is over a specific element (or group of elements) within the draggable.  Use the <code>cancel</code> option to specify a jQuery selector over which to "cancel" draggable functionality.</p>
</div><!-- End demo-description -->

</body>
</html>
generated by cgit v1.2.3 (git 2.39.1) at 2025-08-12 04:05:37 +0000