/*
* @(#)HRuleView.java 1.33 05/11/17
*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*/
package com.intellij.ide;
import java.awt.*;
import javax.swing.event.DocumentEvent;
import javax.swing.text.*;
import javax.swing.text.html.CSS;
import javax.swing.text.html.HTML;
import javax.swing.text.html.HTMLDocument;
import javax.swing.text.html.StyleSheet;
import java.util.Enumeration;
import java.lang.Integer;
/**
* A view implementation to display an html horizontal
* rule.
*
* @author Timothy Prinzing
* @author Sara Swanson
* @version 1.33 11/17/05
*/
class CustomHrView extends View {
private Color myColor;
/**
* Creates a new view that represents an <hr> element.
*
* @param elem the element to create a view for
*/
public CustomHrView(Element elem, Color color) {
super(elem);
myColor = color;
}
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);
int height = 1;
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(myColor);
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
* @throws 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;
}
// --- variables ------------------------------------------------
private float topMargin;
private float bottomMargin;
private float leftMargin;
private float rightMargin;
private int alignment = StyleConstants.ALIGN_CENTER;
private String noshade = "true";
private int size = 0;
private static final int SPACE_ABOVE = 3;
private static final int SPACE_BELOW = 3;
/**
* View Attributes.
*/
private AttributeSet attr;
}