/// <exception cref="NBoilerpipePortable.BoilerpipeProcessingException"></exception>
public bool Process(TextDocument doc)
{
bool changes = false;
IList<TextBlock> blocks = doc.GetTextBlocks();
IList<TextBlock> blocksNew = new List<TextBlock>();
foreach (TextBlock tb in blocks)
{
string text = tb.GetText();
string[] paragraphs = text.Split('[', '\n', '\r', ']', '+');
if (paragraphs.Length < 2)
{
blocksNew.Add(tb);
continue;
}
bool isContent = tb.IsContent();
ICollection<string> labels = tb.GetLabels();
foreach (string p in paragraphs)
{
TextBlock tbP = new TextBlock(p);
tbP.SetIsContent(isContent);
tbP.AddLabels(labels);
blocksNew.Add(tbP);
changes = true;
}
}
if (changes)
{
blocks.Clear();
foreach (var block in blocksNew)
blocks.Add(block);
}
return changes;
}
protected internal virtual bool Classify(TextBlock prev, TextBlock curr, TextBlock
next)
{
bool isContent;
if (curr.GetLinkDensity() <= 0.333333)
{
if (prev.GetLinkDensity() <= 0.555556)
{
if (curr.GetNumWords() <= 16)
{
if (next.GetNumWords() <= 15)
{
if (prev.GetNumWords() <= 4)
{
isContent = false;
}
else
{
isContent = true;
}
}
else
{
isContent = true;
}
}
else
{
isContent = true;
}
}
else
{
if (curr.GetNumWords() <= 40)
{
if (next.GetNumWords() <= 17)
{
isContent = false;
}
else
{
isContent = true;
}
}
else
{
isContent = true;
}
}
}
else
{
isContent = false;
}
return curr.SetIsContent(isContent);
}
protected internal static int GetNumFullTextWords(TextBlock tb, float minTextDensity
)
{
if (tb.GetTextDensity() >= minTextDensity)
{
return tb.GetNumWords();
}
else
{
return 0;
}
}
protected internal static int GetNumFullTextWords(TextBlock tb)
{
return GetNumFullTextWords(tb, 9);
}
protected void AddTextBlock (TextBlock tb)
{
foreach (int l in fontSizeStack) {
tb.AddLabels ("font-" + l);
break;
}
foreach (List<LabelAction> labels in labelStacks) {
if (labels != null) {
foreach (LabelAction label in labels) {
label.AddTo (tb);
}
}
}
textBlocks.Add (tb);
}
public void FlushBlock ()
{
if (inBody == 0) {
if (inBody == 0 && string.Compare("TITLE", lastStartTag, StringComparison.CurrentCultureIgnoreCase) == 0)
SetTitle (tokenBuilder.ToString ().Trim ());
textBuilder.Length = 0;
tokenBuilder.Length = 0;
return;
}
int length = tokenBuilder.Length;
if (length == 0) {
return;
} else if (length == 1) {
if (sbLastWasWhitespace) {
textBuilder.Length = 0;
tokenBuilder.Length = 0;
return;
}
}
string[] tokens = UnicodeTokenizer.Tokenize (tokenBuilder);
int numWords = 0;
int numLinkedWords = 0;
int numWrappedLines = 0;
int currentLineLength = -1; // don't count the first space
int maxLineLength = 80;
int numTokens = 0;
int numWordsCurrentLine = 0;
foreach (string token in tokens) {
if (token == ANCHOR_TEXT_START) {
inAnchorText = true;
} else {
if (token == ANCHOR_TEXT_END) {
inAnchorText = false;
} else {
if (IsWord (token)) {
numTokens++;
numWords++;
numWordsCurrentLine++;
if (inAnchorText) {
numLinkedWords++;
}
int tokenLength = token.Length;
currentLineLength += tokenLength + 1;
if (currentLineLength > maxLineLength) {
numWrappedLines++;
currentLineLength = tokenLength;
numWordsCurrentLine = 1;
}
} else {
numTokens++;
}
}
}
}
if (numTokens == 0) {
return;
}
int numWordsInWrappedLines;
if (numWrappedLines == 0) {
numWordsInWrappedLines = numWords;
numWrappedLines = 1;
} else {
numWordsInWrappedLines = numWords - numWordsCurrentLine;
}
TextBlock tb = new TextBlock (textBuilder.ToString ().Trim (), currentContainedTextElements
, numWords, numLinkedWords, numWordsInWrappedLines, numWrappedLines, offsetBlocks
);
currentContainedTextElements = new BitSet ();
offsetBlocks++;
textBuilder.Length = 0;
tokenBuilder.Length = 0;
tb.SetTagLevel (blockTagLevel);
AddTextBlock (tb);
blockTagLevel = -1;
}
protected internal bool Classify(TextBlock prev, TextBlock curr, TextBlock next)
{
bool isContent = (curr.GetLinkDensity() > 0 && next.GetNumWords() > 11) || (curr.
GetNumWords() > 19 || (next.GetNumWords() > 6 && next.GetLinkDensity() == 0 && prev
.GetLinkDensity() == 0 && (curr.GetNumWords() > 6 || prev.GetNumWords() > 7 || next
.GetNumWords() > 19)));
return curr.SetIsContent(isContent);
}
public bool MeetsCondition(TextBlock tb)
{
return tb.GetLinkDensity() == 0 && tb.GetNumWords() > 6;
}
public Object Clone ()
{
TextBlock clone = new TextBlock (text.ToString());
if (labels != null && !labels.IsEmpty ()) {
clone.labels = new HashSet<string> (labels);
}
if (containedTextElements != null) {
clone.containedTextElements = (BitSet)containedTextElements.Clone ();
}
return clone;
}
