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