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226 lines (173 loc) · 5.17 KB
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package processing.data;
import java.io.*;
import java.util.*;
import javax.swing.text.*;
import javax.swing.text.html.*;
import processing.core.PApplet;
import processing.data.Table;
class HTMLTableScraper {
ArrayList<Table> tables;
TableHTML currentTable;
public HTMLTableScraper(PApplet parent, String where) {
this(parent.createReader(where));
}
public HTMLTableScraper(File file) {
this(PApplet.createReader(file));
}
public HTMLTableScraper(String html) {
this(new StringReader(html));
}
public HTMLTableScraper(Reader reader) {
tables = new ArrayList<Table>();
TableHandler handler = new TableHandler();
parse(reader, handler);
}
// The actual class doing some of the work:
// javax.swing.text.html.parser.ParserDelegator pd;
void parse(Reader reader, HTMLEditorKit.ParserCallback handler) {
HTMLEditorKit.Parser parser = new HTMLEditorKit() {
@Override
public HTMLEditorKit.Parser getParser() {
return super.getParser();
}
}.getParser();
try {
parser.parse(reader, handler, true);
} catch (Exception e) {
e.printStackTrace();
}
}
public int getTableCount() {
return tables.size();
}
public Table getTable(int index) {
return tables.get(index);
}
/**
* Get the list of tables as an array of Table objects.
*/
public Table[] getTables() {
TableHTML[] outgoing = new TableHTML[tables.size()];
tables.toArray(outgoing);
return outgoing;
}
/**
* Get the list of tables as an ArrayList of Table objects.
*/
public ArrayList<Table> getTableList() {
return tables;
}
public void writeTables(PApplet parent, String prefix) {
int digits = 0;
int num = getTableCount();
while (num > 0) {
num /= 10;
digits++;
}
for (int i = 0; i < getTableCount(); i++) {
String name = prefix + PApplet.nf(i, digits);
//tables.get(i).writeCSV(parent.createWriter(name + ".csv"));
parent.saveTable(tables.get(i), name + ".csv");
}
}
////////////////////////////////////////////////////////////////////////////////
class TableHandler extends HTMLEditorKit.ParserCallback {
@Override
public void handleStartTag(HTML.Tag tag, MutableAttributeSet a, int pos) {
if (tag == HTML.Tag.TABLE) {
currentTable = new TableHTML(currentTable);
tables.add(currentTable);
} else if (currentTable != null) {
if (tag == HTML.Tag.TR) {
currentTable.beginTableRow();
} else if (tag == HTML.Tag.TD || tag == HTML.Tag.TH) {
int advance = 1;
String colspanStr = (String) a.getAttribute(HTML.Attribute.COLSPAN);
if (colspanStr != null) {
advance = Integer.parseInt(colspanStr);
}
currentTable.beginTableData(advance);
if (a.getAttribute(HTML.Attribute.ROWSPAN) != null) {
System.err.println("rowspan attribute in this table is being ignored");
}
}
}
}
@Override
public void handleText(char[] c,int pos) {
if (currentTable != null) {
String data = new String(c).trim();
currentTable.setContent(data);
}
}
@Override
public void handleEndTag(HTML.Tag tag, int pos) {
if (currentTable != null) {
if (tag == HTML.Tag.TABLE) {
currentTable = currentTable.parent;
} else if (tag == HTML.Tag.TR) {
currentTable.endTableRow();
} else if (tag == HTML.Tag.TD || tag == HTML.Tag.TH) {
currentTable.endTableData();
}
}
}
}
}
////////////////////////////////////////////////////////////////////////////////
public class TableHTML extends Table {
// used during parse to capture state
TableHTML parent;
int colAdvance;
int rowIndex, colIndex;
int colCount;
TableHTML(TableHTML parent) {
super();
this.parent = parent;
}
void beginTableRow() {
// make sure we have enough room for these rows
addRow();
// if (rowCount == data.length) {
// String[][] temp = new String[data.length << 1][];
// System.arraycopy(data, 0, temp, 0, rowCount);
// data = temp;
// for (int j = rowCount; j < data.length; j++) {
// data[j] = new String[data[0].length];
// }
// }
}
void beginTableData(int advance) {
colAdvance = advance;
// expand the number of columns if necessary
ensureColumn(colIndex + colAdvance - 1);
// if (colIndex + colAdvance > data[0].length) {
// int needed = (colIndex + colAdvance) * 2;
// for (int i = 0; i < data.length; i++) {
// String[] temp = new String[needed];
// System.arraycopy(data[i], 0, temp, 0, colCount);
// data[i] = temp;
// }
// }
}
void setContent(String what) {
//data[rowIndex][colIndex] = what;
String cell = getString(rowIndex, colIndex);
if (cell != null) {
cell += what;
} else {
cell = what;
}
// setString(rowIndex, colIndex, what);
setString(rowIndex, colIndex, cell);
}
void endTableData() {
colIndex += colAdvance;
colCount = Math.max(colIndex, colCount);
}
void endTableRow() {
rowIndex++;
rowCount = rowIndex;
colIndex = 0;
}
}