+
+int ParagraphMetrics::singleWidth(pos_type pos, Font const & font) const
+{
+ // The most special cases are handled first.
+ if (Inset const * inset = par_->getInset(pos))
+ return insetDimension(inset).wid;
+
+ char_type c = par_->getChar(pos);
+
+ if (c == '\t')
+ return 4 * theFontMetrics(font).width(' ');
+
+ if (!isPrintable(c))
+ return theFontMetrics(font).width(c);
+
+ Language const * language = font.language();
+ if (language->rightToLeft()) {
+ if (language->lang() == "arabic_arabtex" ||
+ language->lang() == "arabic_arabi" ||
+ language->lang() == "farsi") {
+ if (Encodings::isArabicComposeChar(c))
+ return 0;
+ c = par_->transformChar(c, pos);
+ } else if (language->lang() == "hebrew" &&
+ Encodings::isHebrewComposeChar(c)) {
+ return 0;
+ }
+ }
+ return theFontMetrics(font).width(c);
+}
+
+
+bool ParagraphMetrics::hfillExpansion(Row const & row, pos_type pos) const
+{
+ if (!par_->isHfill(pos))
+ return false;
+
+ LASSERT(pos >= row.pos() && pos < row.endpos(), /**/);
+
+ // expand at the end of a row only if there is another hfill on the same row
+ if (pos == row.endpos() - 1) {
+ for (pos_type i = row.pos(); i < pos; i++) {
+ if (par_->isHfill(i))
+ return true;
+ }
+ return false;
+ }
+
+ // expand at the beginning of a row only if it is the first row of a paragraph
+ if (pos == row.pos()) {
+ return pos == 0;
+ }
+
+ // do not expand in some labels
+ if (par_->layout().margintype != MARGIN_MANUAL && pos < par_->beginOfBody())
+ return false;
+
+ // if there is anything between the first char of the row and
+ // the specified position that is neither a newline nor an hfill,
+ // the hfill will be expanded, otherwise it won't
+ for (pos_type i = row.pos(); i < pos; i++) {
+ if (!par_->isNewline(i) && !par_->isHfill(i))
+ return true;
+ }
+ return false;
+}
+