* Get the character that is at a position.

 * @param x Position in the string.

 * @return Pointer to the character at the position or NULL if no character is at the position.

 */

const char *Layouter::GetCharAtPosition(int x) const

{

	const ParagraphLayout::Line *line = *this->Begin();;

	for (int run_index = 0; run_index < line->countRuns(); run_index++) {

		const ParagraphLayout::VisualRun *run = line->getVisualRun(run_index);

		for (int i = 0; i < run->getGlyphCount(); i++) {

			/* Not a valid glyph (empty). */

			if (run->getGlyphs()[i] == 0xFFFF) continue;

			int begin_x = run->getPositions()[i * 2];

			int end_x   = run->getPositions()[i * 2 + 2];

			if (IsInsideMM(x, begin_x, end_x)) {

				/* Found our glyph, now convert to UTF-8 string index. */

				size_t index = run->getGlyphToCharMap()[i];

				size_t cur_idx = 0;

				for (const char *str = this->string; *str != '\0'; ) {

					if (cur_idx == index) return str;

					WChar c;

					size_t len = Utf8Decode(&c, str);

#ifdef WITH_ICU

					/* ICU uses UTF-16 internally which means we need to account for surrogate pairs. */

					cur_idx += len < 4 ? 1 : 2;

#else

					cur_idx++;

#endif

					str += len;

				}

			}

		}

	}

	return NULL;

}

/**