author | yan |
Mon, 14 Oct 2013 11:47:27 +0400 | |
changeset 21254 | f6d36ee3f269 |
parent 5506 | 202f599c92aa |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 1997, 2008, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package javax.swing.text.html; |
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import java.awt.*; |
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import javax.swing.event.DocumentEvent; |
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import javax.swing.text.*; |
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import java.util.Enumeration; |
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import java.lang.Integer; |
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/** |
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* A view implementation to display an html horizontal |
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* rule. |
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* |
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* @author Timothy Prinzing |
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* @author Sara Swanson |
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*/ |
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class HRuleView extends View { |
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/** |
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* Creates a new view that represents an <hr> element. |
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* |
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* @param elem the element to create a view for |
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*/ |
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public HRuleView(Element elem) { |
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super(elem); |
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setPropertiesFromAttributes(); |
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} |
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/** |
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* Update any cached values that come from attributes. |
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*/ |
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protected void setPropertiesFromAttributes() { |
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StyleSheet sheet = ((HTMLDocument)getDocument()).getStyleSheet(); |
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AttributeSet eAttr = getElement().getAttributes(); |
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attr = sheet.getViewAttributes(this); |
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alignment = StyleConstants.ALIGN_CENTER; |
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size = 0; |
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noshade = null; |
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widthValue = null; |
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if (attr != null) { |
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// getAlignment() returns ALIGN_LEFT by default, and HR should |
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// use ALIGN_CENTER by default, so we check if the alignment |
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// attribute is actually defined |
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if (attr.getAttribute(StyleConstants.Alignment) != null) { |
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alignment = StyleConstants.getAlignment(attr); |
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} |
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noshade = (String)eAttr.getAttribute(HTML.Attribute.NOSHADE); |
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Object value = eAttr.getAttribute(HTML.Attribute.SIZE); |
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5062055: JEditorPane HTML: HR-tag with attribute size=1px causes NumberFormatException
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if (value != null && (value instanceof String)) { |
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try { |
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size = Integer.parseInt((String)value); |
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} catch (NumberFormatException e) { |
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size = 1; |
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} |
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} |
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value = attr.getAttribute(CSS.Attribute.WIDTH); |
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if (value != null && (value instanceof CSS.LengthValue)) { |
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widthValue = (CSS.LengthValue)value; |
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} |
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topMargin = getLength(CSS.Attribute.MARGIN_TOP, attr); |
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bottomMargin = getLength(CSS.Attribute.MARGIN_BOTTOM, attr); |
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leftMargin = getLength(CSS.Attribute.MARGIN_LEFT, attr); |
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rightMargin = getLength(CSS.Attribute.MARGIN_RIGHT, attr); |
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} |
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else { |
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topMargin = bottomMargin = leftMargin = rightMargin = 0; |
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} |
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size = Math.max(2, size); |
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} |
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// This will be removed and centralized at some point, need to unify this |
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// and avoid private classes. |
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private float getLength(CSS.Attribute key, AttributeSet a) { |
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CSS.LengthValue lv = (CSS.LengthValue) a.getAttribute(key); |
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float len = (lv != null) ? lv.getValue() : 0; |
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return len; |
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} |
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// --- View methods --------------------------------------------- |
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/** |
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* Paints the view. |
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* |
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* @param g the graphics context |
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* @param a the allocation region for the view |
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* @see View#paint |
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*/ |
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public void paint(Graphics g, Shape a) { |
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Rectangle alloc = (a instanceof Rectangle) ? (Rectangle)a : |
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a.getBounds(); |
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int x = 0; |
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int y = alloc.y + SPACE_ABOVE + (int)topMargin; |
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int width = alloc.width - (int)(leftMargin + rightMargin); |
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if (widthValue != null) { |
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width = (int)widthValue.getValue((float)width); |
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} |
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int height = alloc.height - (SPACE_ABOVE + SPACE_BELOW + |
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(int)topMargin + (int)bottomMargin); |
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if (size > 0) |
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height = size; |
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// Align the rule horizontally. |
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switch (alignment) { |
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case StyleConstants.ALIGN_CENTER: |
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x = alloc.x + (alloc.width / 2) - (width / 2); |
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break; |
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case StyleConstants.ALIGN_RIGHT: |
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x = alloc.x + alloc.width - width - (int)rightMargin; |
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break; |
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case StyleConstants.ALIGN_LEFT: |
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default: |
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x = alloc.x + (int)leftMargin; |
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break; |
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} |
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// Paint either a shaded rule or a solid line. |
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if (noshade != null) { |
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g.setColor(Color.black); |
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g.fillRect(x, y, width, height); |
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} |
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else { |
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Color bg = getContainer().getBackground(); |
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Color bottom, top; |
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if (bg == null || bg.equals(Color.white)) { |
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top = Color.darkGray; |
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bottom = Color.lightGray; |
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} |
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else { |
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top = Color.darkGray; |
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bottom = Color.white; |
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} |
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g.setColor(bottom); |
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g.drawLine(x + width - 1, y, x + width - 1, y + height - 1); |
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g.drawLine(x, y + height - 1, x + width - 1, y + height - 1); |
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g.setColor(top); |
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g.drawLine(x, y, x + width - 1, y); |
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g.drawLine(x, y, x, y + height - 1); |
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} |
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} |
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/** |
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* Calculates the desired shape of the rule... this is |
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* basically the preferred size of the border. |
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* |
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* @param axis may be either X_AXIS or Y_AXIS |
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* @return the desired span |
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* @see View#getPreferredSpan |
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*/ |
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public float getPreferredSpan(int axis) { |
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switch (axis) { |
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case View.X_AXIS: |
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return 1; |
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case View.Y_AXIS: |
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if (size > 0) { |
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return size + SPACE_ABOVE + SPACE_BELOW + topMargin + |
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bottomMargin; |
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} else { |
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if (noshade != null) { |
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return 2 + SPACE_ABOVE + SPACE_BELOW + topMargin + |
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bottomMargin; |
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} else { |
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return SPACE_ABOVE + SPACE_BELOW + topMargin +bottomMargin; |
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} |
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} |
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default: |
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throw new IllegalArgumentException("Invalid axis: " + axis); |
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} |
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} |
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/** |
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* Gets the resize weight for the axis. |
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* The rule is: rigid vertically and flexible horizontally. |
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* |
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* @param axis may be either X_AXIS or Y_AXIS |
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* @return the weight |
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*/ |
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public int getResizeWeight(int axis) { |
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if (axis == View.X_AXIS) { |
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return 1; |
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} else if (axis == View.Y_AXIS) { |
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return 0; |
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} else { |
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return 0; |
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} |
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} |
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/** |
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* Determines how attractive a break opportunity in |
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* this view is. This is implemented to request a forced break. |
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* |
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* @param axis may be either View.X_AXIS or View.Y_AXIS |
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* @param pos the potential location of the start of the |
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* broken view (greater than or equal to zero). |
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* This may be useful for calculating tab |
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* positions. |
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* @param len specifies the relative length from <em>pos</em> |
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* where a potential break is desired. The value must be greater |
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* than or equal to zero. |
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* @return the weight, which should be a value between |
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* ForcedBreakWeight and BadBreakWeight. |
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*/ |
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public int getBreakWeight(int axis, float pos, float len) { |
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if (axis == X_AXIS) { |
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return ForcedBreakWeight; |
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} |
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return BadBreakWeight; |
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} |
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public View breakView(int axis, int offset, float pos, float len) { |
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return null; |
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} |
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/** |
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* Provides a mapping from the document model coordinate space |
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* to the coordinate space of the view mapped to it. |
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* |
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* @param pos the position to convert |
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* @param a the allocated region to render into |
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* @return the bounding box of the given position |
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* @exception BadLocationException if the given position does not |
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* represent a valid location in the associated document |
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* @see View#modelToView |
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*/ |
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public Shape modelToView(int pos, Shape a, Position.Bias b) throws BadLocationException { |
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int p0 = getStartOffset(); |
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int p1 = getEndOffset(); |
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if ((pos >= p0) && (pos <= p1)) { |
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Rectangle r = a.getBounds(); |
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if (pos == p1) { |
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r.x += r.width; |
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} |
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r.width = 0; |
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return r; |
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} |
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return null; |
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} |
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/** |
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* Provides a mapping from the view coordinate space to the logical |
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* coordinate space of the model. |
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* |
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* @param x the X coordinate |
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* @param y the Y coordinate |
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* @param a the allocated region to render into |
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* @return the location within the model that best represents the |
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* given point of view |
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* @see View#viewToModel |
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*/ |
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public int viewToModel(float x, float y, Shape a, Position.Bias[] bias) { |
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Rectangle alloc = (Rectangle) a; |
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if (x < alloc.x + (alloc.width / 2)) { |
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bias[0] = Position.Bias.Forward; |
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return getStartOffset(); |
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} |
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bias[0] = Position.Bias.Backward; |
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return getEndOffset(); |
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} |
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/** |
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* Fetches the attributes to use when rendering. This is |
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* implemented to multiplex the attributes specified in the |
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* model with a StyleSheet. |
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*/ |
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public AttributeSet getAttributes() { |
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return attr; |
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} |
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public void changedUpdate(DocumentEvent changes, Shape a, ViewFactory f) { |
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super.changedUpdate(changes, a, f); |
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int pos = changes.getOffset(); |
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if (pos <= getStartOffset() && (pos + changes.getLength()) >= |
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getEndOffset()) { |
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setPropertiesFromAttributes(); |
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} |
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} |
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// --- variables ------------------------------------------------ |
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private float topMargin; |
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private float bottomMargin; |
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private float leftMargin; |
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private float rightMargin; |
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private int alignment = StyleConstants.ALIGN_CENTER; |
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private String noshade = null; |
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private int size = 0; |
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private CSS.LengthValue widthValue; |
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private static final int SPACE_ABOVE = 3; |
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private static final int SPACE_BELOW = 3; |
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/** View Attributes. */ |
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private AttributeSet attr; |
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} |