/**
* Construct VIPS block tree from viewport.
*
* <p>Starts from <body> element.
*
* @param element Box that represents element
* @param node Visual structure tree node
*/
private void constructVipsBlockTree(Box element, VipsBlock node) {
node.setBox(element);
if (!(element instanceof TextBox)) {
for (Box box : ((ElementBox) element).getSubBoxList()) {
node.addChild(new VipsBlock());
constructVipsBlockTree(box, node.getChildren().get(node.getChildren().size() - 1));
}
}
}
/**
* Counts number of visual blocks in visual structure
*
* @param vipsBlock Visual structure
*/
private void getVisualBlocksCount(VipsBlock vipsBlock) {
if (vipsBlock.isVisualBlock()) _visualBlocksCount++;
for (VipsBlock vipsBlockChild : vipsBlock.getChildren()) {
if (!(vipsBlockChild.getBox() instanceof TextBox)) getVisualBlocksCount(vipsBlockChild);
}
}
/**
* Tries to divide DOM elements and finds visual blocks.
*
* @param vipsBlock Visual structure
*/
private void divideVipsBlockTree(VipsBlock vipsBlock) {
_currentVipsBlock = vipsBlock;
ElementBox elementBox = (ElementBox) vipsBlock.getBox();
// System.err.println(elementBox.getNode().getNodeName());
// System.out.println(elementBox.getText());
if (elementBox.getElement().getAttribute("id").equals("logosLine")) {
System.out.println();
}
// With VIPS rules it tries to determine if element is dividable
if (applyVipsRules(elementBox) && vipsBlock.isDividable() && !vipsBlock.isVisualBlock()) {
// if element is dividable, let's divide it
_currentVipsBlock.setAlreadyDivided(true);
for (VipsBlock vipsBlockChild : vipsBlock.getChildren()) {
if (!(vipsBlockChild.getBox() instanceof TextBox)) divideVipsBlockTree(vipsBlockChild);
}
} else {
if (vipsBlock.isDividable()) {
// System.err.println("Element " + elementBox.getNode().getNodeName() + " is visual block");
vipsBlock.setIsVisualBlock(true);
vipsBlock.setDoC(11);
}
if (!verifyValidity(elementBox)) {
_currentVipsBlock.setIsVisualBlock(false);
}
/*
if (vipsBlock.isVisualBlock())
//System.err.println("Element " + elementBox.getNode().getNodeName() + " is visual block");
else
System.err.println("Element " + elementBox.getNode().getNodeName() + " is not visual block");*/
}
}
/**
* Finds previous sibling node's VIPS block.
*
* @param node Node
* @param vipsBlock Actual VIPS block
* @param foundBlock VIPS block for given node
*/
private void findPreviousSiblingNodeVipsBlock(Node node, VipsBlock vipsBlock) {
if (vipsBlock.getBox().getNode().equals(node)) {
_tempVipsBlock = vipsBlock;
return;
} else
for (VipsBlock vipsBlockChild : vipsBlock.getChildren())
findPreviousSiblingNodeVipsBlock(node, vipsBlockChild);
}
/**
* VIPS Rule Three
*
* <p>If the DOM node is the root node of the sub-DOM tree (corresponding to the block), and there
* is only one sub DOM tree corresponding to this block, divide this node.
*
* @param node Input node
* @return True, if rule is applied, otherwise false.
*/
private boolean ruleThree(ElementBox node) {
// System.err.println("Applying rule Three on " + node.getNode().getNodeName() + " node");
if (!node.isRootElement()) return false;
boolean result = true;
int cnt = 0;
for (VipsBlock vipsBlock : _vipsBlocks.getChildren()) {
if (vipsBlock.getBox().getNode().getNodeName().equals(node.getNode().getNodeName())) {
result = true;
isOnlyOneDomSubTree(node.getNode(), vipsBlock.getBox().getNode(), result);
if (result) cnt++;
}
}
return (cnt == 1) ? true : false;
}
/**
* VIPS Rule Seven
*
* <p>If the background color of this node is different from one of its children’s, divide this
* node and at the same time, the child node with different background color will not be divided
* in this round. Set the DoC value (6-8) for the child node based on the <html> tag of the
* child node and the size of the child node.
*
* @param node Input node
* @return True, if rule is applied, otherwise false.
*/
private boolean ruleSeven(ElementBox node) {
// System.err.println("Applying rule Seven on " + node.getNode().getNodeName() + " node");
if (node.getSubBoxList().isEmpty()) return false;
if (isTextNode(node)) return false;
// String nodeBgColor = node.getStylePropertyValue("background-color");
String nodeBgColor = _currentVipsBlock.getBgColor();
for (VipsBlock vipsStructureChild : _currentVipsBlock.getChildren()) {
if (!(vipsStructureChild.getBgColor().equals(nodeBgColor))) {
vipsStructureChild.setIsDividable(false);
vipsStructureChild.setIsVisualBlock(true);
// TODO DoC values
vipsStructureChild.setDoC(7);
return true;
}
}
return false;
}
private void findVisualBlocks(VipsBlock vipsBlock, List<VipsBlock> list) {
if (vipsBlock.isVisualBlock()) list.add(vipsBlock);
for (VipsBlock vipsStructureChild : vipsBlock.getChildren())
findVisualBlocks(vipsStructureChild, list);
}
