public void paint(Graphics g, JComponent c) {
AbstractButton b = (AbstractButton) c;
ButtonModel model = b.getModel();
String text = layout(b, SwingUtilities2.getFontMetrics(b, g), b.getWidth(), b.getHeight());
clearTextShiftOffset();
// perform UI specific press action, e.g. Windows L&F shifts text
if (model.isArmed() && model.isPressed()) {
paintButtonPressed(g, b);
}
// Paint the Icon
if (b.getIcon() != null) {
paintIcon(g, c, iconRect);
}
if (text != null && !text.equals("")) {
View v = (View) c.getClientProperty(BasicHTML.propertyKey);
if (v != null) {
v.paint(g, textRect);
} else {
paintText(g, b, textRect, text);
}
}
if (b.isFocusPainted() && b.hasFocus()) {
// paint UI specific focus
paintFocus(g, b, viewRect, textRect, iconRect);
}
}
/**
* Performs layout for the minor axis of the box (i.e. the axis orthogonal to the axis that it
* represents). The results of the layout (the offset and span for each children) are placed in
* the given arrays which represent the allocations to the children along the minor axis.
*
* @param targetSpan the total span given to the view, which would be used to layout the children.
* @param axis the axis being layed out
* @param offsets the offsets from the origin of the view for each of the child views; this is a
* return value and is filled in by the implementation of this method
* @param spans the span of each child view; this is a return value and is filled in by the
* implementation of this method
*/
protected void layoutMinorAxis(int targetSpan, int axis, int[] offsets, int[] spans) {
int n = getViewCount();
Object key = (axis == X_AXIS) ? CSS.Attribute.WIDTH : CSS.Attribute.HEIGHT;
for (int i = 0; i < n; i++) {
View v = getView(i);
int min = (int) v.getMinimumSpan(axis);
int max;
// check for percentage span
AttributeSet a = v.getAttributes();
CSS.LengthValue lv = (CSS.LengthValue) a.getAttribute(key);
if ((lv != null) && lv.isPercentage()) {
// bound the span to the percentage specified
min = Math.max((int) lv.getValue(targetSpan), min);
max = min;
} else {
max = (int) v.getMaximumSpan(axis);
}
// assign the offset and span for the child
if (max < targetSpan) {
// can't make the child this wide, align it
float align = v.getAlignment(axis);
offsets[i] = (int) ((targetSpan - max) * align);
spans[i] = max;
} else {
// make it the target width, or as small as it can get.
offsets[i] = 0;
spans[i] = Math.max(min, targetSpan);
}
}
}
/**
* Indicates whether or not this view should be displayed. If none of the children wish to be
* displayed and the only visible child is the break that ends the paragraph, the paragraph will
* not be considered visible. Otherwise, it will be considered visible and return true.
*
* @return true if the paragraph should be displayed
*/
public boolean isVisible() {
int n = getLayoutViewCount() - 1;
for (int i = 0; i < n; i++) {
View v = getLayoutView(i);
if (v.isVisible()) {
return true;
}
}
if (n > 0) {
View v = getLayoutView(n);
if ((v.getEndOffset() - v.getStartOffset()) == 1) {
return false;
}
}
// If it's the last paragraph and not editable, it shouldn't
// be visible.
if (getStartOffset() == getDocument().getLength()) {
boolean editable = false;
Component c = getContainer();
if (c instanceof JTextComponent) {
editable = ((JTextComponent) c).isEditable();
}
if (!editable) {
return false;
}
}
return true;
}
/**
* Gives notification that something was inserted into the document in a location that this view
* is responsible for. This is implemented to simply update the children.
*
* @param changes The change information from the associated document.
* @param a the current allocation of the view
* @param f the factory to use to rebuild if the view has children
* @see View#insertUpdate
*/
public void insertUpdate(DocumentEvent changes, Shape a, ViewFactory f) {
updateChildren(changes, a);
Rectangle alloc = ((a != null) && isAllocationValid()) ? getInsideAllocation(a) : null;
int pos = changes.getOffset();
View v = getViewAtPosition(pos, alloc);
if (v != null) v.insertUpdate(changes, alloc, f);
}
@Override
public int viewToModel(float x, float y, Shape a, Position.Bias[] bias) {
int offs = -1;
if (!isAllocationValid()) {
Rectangle alloc = a.getBounds();
setSize(alloc.width, alloc.height);
}
// Get the child view for the line at (x,y), and ask it for the
// specific offset.
Rectangle alloc = getInsideAllocation(a);
View v = getViewAtPoint((int) x, (int) y, alloc);
if (v != null) {
offs = v.viewToModel(x, y, alloc, bias);
}
// Code folding may have hidden the last line. If so, return the last
// visible offset instead of the last offset.
if (host.isCodeFoldingEnabled()
&& v == getView(getViewCount() - 1)
&& offs == v.getEndOffset() - 1) {
offs = host.getLastVisibleOffset();
}
return offs;
}
public Dimension getMaximumSize(JComponent c) {
Dimension d = getPreferredSize(c);
View v = (View) c.getClientProperty(BasicHTML.propertyKey);
if (v != null) {
d.width += v.getMaximumSpan(View.X_AXIS) - v.getPreferredSpan(View.X_AXIS);
}
return d;
}
private boolean contains(View logicalView, View v) {
int n = logicalView.getViewCount();
for (int i = 0; i < n; i++) {
if (logicalView.getView(i) == v) {
return true;
}
}
return false;
}
/**
* Paints the View.
*
* @param g the rendering surface to use
* @param a the allocated region to render into
* @see View#paint
*/
@Override
public void paint(Graphics g, Shape a) {
sync();
Rectangle rect = (a instanceof Rectangle) ? (Rectangle) a : a.getBounds();
Image image = getImage();
Rectangle clip = g.getClipBounds();
fBounds.setBounds(rect);
paintHighlights(g, a);
paintBorder(g, rect);
if (clip != null) {
g.clipRect(
rect.x + leftInset,
rect.y + topInset,
rect.width - leftInset - rightInset,
rect.height - topInset - bottomInset);
}
if (image != null) {
if (!hasPixels(image)) {
// No pixels yet, use the default
Icon icon = (image == null) ? getNoImageIcon() : getLoadingImageIcon();
if (icon != null) {
icon.paintIcon(getContainer(), g, rect.x + leftInset, rect.y + topInset);
}
} else {
// Draw the image
g.drawImage(image, rect.x + leftInset, rect.y + topInset, width, height, imageObserver);
}
} else {
Icon icon = getNoImageIcon();
if (icon != null) {
icon.paintIcon(getContainer(), g, rect.x + leftInset, rect.y + topInset);
}
View view = getAltView();
// Paint the view representing the alt text, if its non-null
if (view != null && ((state & WIDTH_FLAG) == 0 || width > DEFAULT_WIDTH)) {
// Assume layout along the y direction
Rectangle altRect =
new Rectangle(
rect.x + leftInset + DEFAULT_WIDTH,
rect.y + topInset,
rect.width - leftInset - rightInset - DEFAULT_WIDTH,
rect.height - topInset - bottomInset);
view.paint(g, altRect);
}
}
if (clip != null) {
// Reset clip.
g.setClip(clip.x, clip.y, clip.width, clip.height);
}
}
/**
* Returns the preferred span of the View used to display the alt text, or 0 if the view does not
* exist.
*/
private float getPreferredSpanFromAltView(int axis) {
if (getImage() == null) {
View view = getAltView();
if (view != null) {
return view.getPreferredSpan(axis);
}
}
return 0f;
}
/**
* Forwards the <code>DocumentEvent</code> to the give child view. This simply messages the view
* with a call to <code>insertUpdate</code>, <code>removeUpdate</code>, or <code>changedUpdate
* </code> depending upon the type of the event. This is called by <a
* href="#forwardUpdate">forwardUpdate</a> to forward the event to children that need it.
*
* @param v the child view to forward the event to
* @param e the change information from the associated document
* @param a the current allocation of the view
* @param f the factory to use to rebuild if the view has children
* @see #forwardUpdate
* @since 1.3
*/
protected void forwardUpdateToView(View v, DocumentEvent e, Shape a, ViewFactory f) {
DocumentEvent.EventType type = e.getType();
if (type == DocumentEvent.EventType.INSERT) {
v.insertUpdate(e, a, f);
} else if (type == DocumentEvent.EventType.REMOVE) {
v.removeUpdate(e, a, f);
} else {
v.changedUpdate(e, a, f);
}
}
/**
* Update the flow on the given FlowView. By default, this causes all of the rows (child views)
* to be rebuilt to match the given constraints for each row. This is called by a
* FlowView.layout to update the child views in the flow.
*
* @param fv the view to reflow
*/
public void layout(FlowView fv) {
int p0 = fv.getStartOffset();
int p1 = fv.getEndOffset();
// we want to preserve all views from the logicalView from being
// removed
View lv = getLogicalView(fv);
int n = lv.getViewCount();
for (int i = 0; i < n; i++) {
View v = lv.getView(i);
v.setParent(lv);
}
fv.removeAll();
for (int rowIndex = 0; p0 < p1; rowIndex++) {
View row = fv.createRow();
fv.append(row);
// layout the row to the current span. If nothing fits,
// force something.
int next = layoutRow(fv, rowIndex, p0);
if (row.getViewCount() == 0) {
row.append(createView(fv, p0, Integer.MAX_VALUE, rowIndex));
next = row.getEndOffset();
}
if (next <= p0) {
throw new StateInvariantError("infinite loop in formatting");
} else {
p0 = next;
}
}
}
/** Returns the view to use for alternate text. This may be null. */
private View getAltView() {
View view;
synchronized (this) {
view = altView;
}
if (view != null && view.getParent() == null) {
view.setParent(getParent());
}
return view;
}
private void recursiveReparent(View v, View logicalView) {
int n = v.getViewCount();
for (int i = 0; i < n; i++) {
View tmpView = v.getView(i);
if (contains(logicalView, tmpView)) {
tmpView.setParent(logicalView);
} else {
recursiveReparent(tmpView, logicalView);
}
}
}
/**
* Fetches the child view index representing the given position in the model.
*
* @param pos the position >= 0
* @return index of the view representing the given position, or -1 if no view represents that
* position
*/
protected int getViewIndexAtPosition(int pos) {
if (pos >= getStartOffset() && (pos < getEndOffset())) {
for (int counter = getViewCount() - 1; counter >= 0; counter--) {
View v = getView(counter);
if (pos >= v.getStartOffset() && pos < v.getEndOffset()) {
return counter;
}
}
}
return -1;
}
@Override
public Color getForeground() {
View parent;
if (fg == null && (parent = getParent()) != null) {
Document doc = getDocument();
AttributeSet attr = parent.getAttributes();
if (attr != null && (doc instanceof StyledDocument)) {
fg = ((StyledDocument) doc).getForeground(attr);
}
}
return fg;
}
/* */ public void removeUpdate(
DocumentEvent paramDocumentEvent, Shape paramShape, ViewFactory paramViewFactory)
/* */ {
/* 485 */ updateChildren(paramDocumentEvent, paramShape);
/* */
/* 487 */ Rectangle localRectangle =
(paramShape != null) && (isAllocationValid()) ? getInsideAllocation(paramShape) : null;
/* */
/* 489 */ int i = paramDocumentEvent.getOffset();
/* 490 */ View localView = getViewAtPosition(i, localRectangle);
/* 491 */ if (localView != null)
/* 492 */ localView.removeUpdate(paramDocumentEvent, localRectangle, paramViewFactory);
/* */ }
/** {@inheritDoc} */
@Override
public void paint(final Graphics2D g2d, final Rectangle bounds, final E label) {
// Applying graphics settings
final Composite oc = LafUtils.setupAlphaComposite(g2d, transparency, transparency != null);
final Map textHints =
drawShade ? StyleConstants.defaultTextRenderingHints : StyleConstants.textRenderingHints;
final Font oldFont = LafUtils.setupFont(g2d, label.getFont());
final Map oldHints = SwingUtils.setupTextAntialias(g2d, textHints);
// Retrieving icon & text
final String text = label.getText();
final Icon icon = (label.isEnabled()) ? label.getIcon() : label.getDisabledIcon();
// Painting background
if (backgroundPainter != null) {
backgroundPainter.paint(g2d, bounds, label);
}
// We don't need to go futher if there is not icon/text
if (icon == null && text == null) {
return;
}
final FontMetrics fm = label.getFontMetrics(label.getFont());
final String clippedText = layout(label, fm, label.getWidth(), label.getHeight());
if (icon != null) {
icon.paintIcon(label, g2d, paintIconR.x, paintIconR.y);
}
if (text != null) {
final View v = (View) label.getClientProperty(BasicHTML.propertyKey);
if (v != null) {
// Painting HTML label view
v.paint(g2d, paintTextR);
} else {
// Painting plain label view
final int textX = paintTextR.x;
final int textY = paintTextR.y + fm.getAscent();
if (label.isEnabled()) {
paintEnabledText(label, g2d, clippedText, textX, textY);
} else {
paintDisabledText(label, g2d, clippedText, textX, textY);
}
}
}
SwingUtils.restoreTextAntialias(g2d, oldHints);
LafUtils.restoreFont(g2d, oldFont);
LafUtils.restoreComposite(g2d, oc, transparency != null);
}
/**
* Sets the size of the view. This should cause layout of the view if it has any layout duties.
*
* @param width the width >= 0
* @param height the height >= 0
*/
@Override
public void setSize(float width, float height) {
sync();
if (getImage() == null) {
View view = getAltView();
if (view != null) {
view.setSize(
Math.max(0f, width - (DEFAULT_WIDTH + leftInset + rightInset)),
Math.max(0f, height - (topInset + bottomInset)));
}
}
}
/**
* Determines the preferred span for this view along an axis.
*
* @param axis may be either View.X_AXIS or View.Y_AXIS
* @return the span the view would like to be rendered into. Typically the view is told to
* render into the span that is returned, although there is no guarantee. The parent may
* choose to resize or break the view.
* @see View#getPreferredSpan
*/
public float getPreferredSpan(int axis) {
float maxpref = 0;
float pref = 0;
int n = getViewCount();
for (int i = 0; i < n; i++) {
View v = getView(i);
pref += v.getPreferredSpan(axis);
if (v.getBreakWeight(axis, 0, Short.MAX_VALUE) >= ForcedBreakWeight) {
maxpref = Math.max(maxpref, pref);
pref = 0;
}
}
maxpref = Math.max(maxpref, pref);
return maxpref;
}
@Override
protected void paintText(
Graphics graphics,
int tabPlacement,
Font font,
FontMetrics metrics,
int tabIndex,
String title,
Rectangle textRect,
boolean isSelected) {
if (null == graphics) {
return;
}
Graphics2D g = (Graphics2D) graphics;
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
g.setFont(font);
View v = getTextViewForTab(tabIndex);
if (v != null) {
// html
v.paint(g, textRect);
} else {
// plain text
int mnemIndex = tabPane.getDisplayedMnemonicIndexAt(tabIndex);
if (tabPane.isEnabled() && tabPane.isEnabledAt(tabIndex)) {
Color fg = tabPane.getForegroundAt(tabIndex);
if (isSelected && (fg instanceof UIResource)) {
Color selectedFG = TabColors.SELECTED_FOREGROUND;
if (selectedFG != null) {
fg = selectedFG;
}
}
g.setColor(fg);
SwingUtilities2.drawStringUnderlineCharAt(
tabPane, g, title, mnemIndex, textRect.x, textRect.y + metrics.getAscent());
} else { // tab disabled
g.setColor(tabPane.getBackgroundAt(tabIndex).brighter());
SwingUtilities2.drawStringUnderlineCharAt(
tabPane, g, title, mnemIndex, textRect.x, textRect.y + metrics.getAscent());
g.setColor(tabPane.getBackgroundAt(tabIndex).darker());
SwingUtilities2.drawStringUnderlineCharAt(
tabPane, g, title, mnemIndex, textRect.x - 1, textRect.y + metrics.getAscent() - 1);
}
}
}
/**
* Forwards the given <code>DocumentEvent</code> to the child views that need to be notified of
* the change to the model. If there were changes to the element this view is responsible for,
* that should be considered when forwarding (i.e. new child views should not get notified).
*
* @param ec changes to the element this view is responsible for (may be <code>null</code> if
* there were no changes).
* @param e the change information from the associated document
* @param a the current allocation of the view
* @param f the factory to use to rebuild if the view has children
* @see #insertUpdate
* @see #removeUpdate
* @see #changedUpdate
* @since 1.3
*/
protected void forwardUpdate(
DocumentEvent.ElementChange ec, DocumentEvent e, Shape a, ViewFactory f) {
Element elem = getElement();
int pos = e.getOffset();
int index0 = getViewIndex(pos, Position.Bias.Forward);
if (index0 == -1 && e.getType() == DocumentEvent.EventType.REMOVE && pos >= getEndOffset()) {
// Event beyond our offsets. We may have represented this, that is
// the remove may have removed one of our child Elements that
// represented this, so, we should foward to last element.
index0 = getViewCount() - 1;
}
int index1 = index0;
View v = (index0 >= 0) ? getView(index0) : null;
if (v != null) {
if ((v.getStartOffset() == pos) && (pos > 0)) {
// If v is at a boundary, forward the event to the previous
// view too.
index0 = Math.max(index0 - 1, 0);
}
}
if (e.getType() != DocumentEvent.EventType.REMOVE) {
index1 = getViewIndex(pos + e.getLength(), Position.Bias.Forward);
if (index1 < 0) {
index1 = getViewCount() - 1;
}
}
int hole0 = index1 + 1;
int hole1 = hole0;
Element[] addedElems = (ec != null) ? ec.getChildrenAdded() : null;
if ((addedElems != null) && (addedElems.length > 0)) {
hole0 = ec.getIndex();
hole1 = hole0 + addedElems.length - 1;
}
// forward to any view not in the forwarding hole
// formed by added elements (i.e. they will be updated
// by initialization.
index0 = Math.max(index0, 0);
for (int i = index0; i <= index1; i++) {
if (!((i >= hole0) && (i <= hole1))) {
v = getView(i);
if (v != null) {
Shape childAlloc = getChildAllocation(i, a);
forwardUpdateToView(v, e, childAlloc, f);
}
}
}
}
/**
* paintLayer
*
* @param g Graphics
* @param offs0 the beginning
* @param offs1 the end
* @param bounds the bounds
* @param c the text component where to paint
* @param view the view to use
* @return the shape containg the highlighted text
*/
public Shape paintLayer(
Graphics g, int offs0, int offs1, Shape bounds, JTextComponent c, View view) {
try {
Rectangle r =
(Rectangle)
view.modelToView(
offs0, Position.Bias.Forward, offs1, Position.Bias.Backward, bounds);
g.setColor(color);
switch (type) {
case UNDERLINED:
g.drawLine(r.x, r.y + r.height - 1, r.x + r.width - 1, r.y + r.height - 1);
return r;
case FRAMED:
g.drawRect(r.x, r.y, r.width - 1, r.height - 1);
return r;
case FILLED:
default:
g.fillRect(r.x, r.y, r.width, r.height);
return r;
}
} catch (BadLocationException e) {
return null;
}
}
/**
* Sets the parent of the view. This is reimplemented to provide the superclass behavior as well
* as calling the <code>loadChildren</code> method if this view does not already have children.
* The children should not be loaded in the constructor because the act of setting the parent may
* cause them to try to search up the hierarchy (to get the hosting <code>Container</code> for
* example). If this view has children (the view is being moved from one place in the view
* hierarchy to another), the <code>loadChildren</code> method will not be called.
*
* @param parent the parent of the view, <code>null</code> if none
*/
public void setParent(View parent) {
super.setParent(parent);
if ((parent != null) && (nchildren == 0)) {
ViewFactory f = getViewFactory();
loadChildren(f);
}
}
/** Paints one view that corresponds to a line (or multiple lines if folding takes effect). */
private void paintView(View view, Graphics g, int yBase) {
JTextComponent component = editorUI.getComponent();
if (component == null) return;
BaseTextUI textUI = (BaseTextUI) component.getUI();
Element rootElem = textUI.getRootView(component).getElement();
int line = rootElem.getElementIndex(view.getStartOffset());
String annotation = ""; // NOI18N
AnnotateLine al = null;
if (!elementAnnotations.isEmpty()) {
al = getAnnotateLine(line);
if (al != null) {
annotation = getDisplayName(al); // NOI18N
}
} else {
annotation = elementAnnotationsSubstitute;
}
if (al != null && al.getRevision().equals(recentRevision)) {
g.setColor(selectedColor());
} else {
g.setColor(foregroundColor());
}
int texty = yBase + editorUI.getLineAscent();
int textx = 2;
g.drawString(annotation, textx, texty);
}
/**
* Establishes the parent view for this view. Seize this moment to cache the AWT Container I'm in.
*/
public void setParent(View parent) {
super.setParent(parent);
fContainer = parent != null ? getContainer() : null;
if (parent == null && fComponent != null) {
fComponent.getParent().remove(fComponent);
fComponent = null;
}
}
/** @see javax.swing.plaf.basic.BasicTextUI#getPreferredSize(javax.swing.JComponent) */
public Dimension getPreferredSize(JComponent c) {
// The following code has been derived from BasicTextUI.
Document doc = ((JTextComponent) c).getDocument();
Insets i = c.getInsets();
Dimension d = c.getSize();
View rootView = getRootView((JTextComponent) c);
if (doc instanceof AbstractDocument) {
((AbstractDocument) doc).readLock();
}
try {
if ((d.width > (i.left + i.right)) && (d.height > (i.top + i.bottom))) {
rootView.setSize(d.width - i.left - i.right, d.height - i.top - i.bottom);
} else if (d.width == 0 && d.height == 0) {
// Probably haven't been layed out yet, force some sort of
// initial sizing.
rootView.setSize(Integer.MAX_VALUE, Integer.MAX_VALUE);
}
d.width =
(int)
Math.min(
(long) rootView.getPreferredSpan(View.X_AXIS) + (long) i.left + (long) i.right,
Integer.MAX_VALUE);
d.height =
(int)
Math.min(
(long) rootView.getPreferredSpan(View.Y_AXIS) + (long) i.top + (long) i.bottom,
Integer.MAX_VALUE);
} finally {
if (doc instanceof AbstractDocument) {
((AbstractDocument) doc).readUnlock();
}
}
// Fix: The preferred width is always two pixels too small on a Mac.
d.width += 2;
// We'd like our heights to be odd by default.
if ((d.height & 1) == 0) {
d.height--;
}
return d;
}
/**
* Gets the alignment.
*
* @param axis may be either X_AXIS or Y_AXIS
* @return the alignment
*/
public float getAlignment(int axis) {
switch (axis) {
case View.X_AXIS:
return 0;
case View.Y_AXIS:
if (getViewCount() == 0) {
return 0;
}
float span = getPreferredSpan(View.Y_AXIS);
View v = getView(0);
float above = v.getPreferredSpan(View.Y_AXIS);
float a = (((int) span) != 0) ? (above * v.getAlignment(View.Y_AXIS)) / span : 0;
return a;
default:
throw new IllegalArgumentException("Invalid axis: " + axis);
}
}
/** Returns the baseline for single line text components, like <code>JTextField</code>. */
private static int getSingleLineTextBaseline(JTextComponent textComponent, int h) {
View rootView = textComponent.getUI().getRootView(textComponent);
if (rootView.getViewCount() > 0) {
Insets insets = textComponent.getInsets();
int height = h - insets.top - insets.bottom;
int y = insets.top;
View fieldView = rootView.getView(0);
int vspan = (int) fieldView.getPreferredSpan(View.Y_AXIS);
if (height != vspan) {
int slop = height - vspan;
y += slop / 2;
}
FontMetrics fm = textComponent.getFontMetrics(textComponent.getFont());
y += fm.getAscent();
return y;
}
return -1;
}
/**
* Determines the minimum span for this view along an axis. The is implemented to find the
* minimum unbreakable span.
*
* @param axis may be either View.X_AXIS or View.Y_AXIS
* @return the span the view would like to be rendered into. Typically the view is told to
* render into the span that is returned, although there is no guarantee. The parent may
* choose to resize or break the view.
* @see View#getPreferredSpan
*/
public float getMinimumSpan(int axis) {
float maxmin = 0;
float min = 0;
boolean nowrap = false;
int n = getViewCount();
for (int i = 0; i < n; i++) {
View v = getView(i);
if (v.getBreakWeight(axis, 0, Short.MAX_VALUE) == BadBreakWeight) {
min += v.getPreferredSpan(axis);
nowrap = true;
} else if (nowrap) {
maxmin = Math.max(min, maxmin);
nowrap = false;
min = 0;
}
}
maxmin = Math.max(maxmin, min);
return maxmin;
}
/**
* Determines the preferred span for this view along an axis.
*
* @param axis may be either X_AXIS or Y_AXIS
* @return the span the view would like to be rendered into; typically the view is told to render
* into the span that is returned, although there is no guarantee; the parent may choose to
* resize or break the view
*/
@Override
public float getPreferredSpan(int axis) {
sync();
// If the attributes specified a width/height, always use it!
if (axis == View.X_AXIS && (state & WIDTH_FLAG) == WIDTH_FLAG) {
getPreferredSpanFromAltView(axis);
return width + leftInset + rightInset;
}
if (axis == View.Y_AXIS && (state & HEIGHT_FLAG) == HEIGHT_FLAG) {
getPreferredSpanFromAltView(axis);
return height + topInset + bottomInset;
}
Image image = getImage();
if (image != null) {
switch (axis) {
case View.X_AXIS:
return width + leftInset + rightInset;
case View.Y_AXIS:
return height + topInset + bottomInset;
default:
throw new IllegalArgumentException("Invalid axis: " + axis);
}
} else {
View view = getAltView();
float retValue = 0f;
if (view != null) {
retValue = view.getPreferredSpan(axis);
}
switch (axis) {
case View.X_AXIS:
return retValue + (width + leftInset + rightInset);
case View.Y_AXIS:
return retValue + (height + topInset + bottomInset);
default:
throw new IllegalArgumentException("Invalid axis: " + axis);
}
}
}