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Avoid excessive string allocations in updateLineStartList. Fixes some performance issues.

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This commit is contained in:
Shyotl
2016-06-04 01:19:12 -05:00
parent 8ff1f46d08
commit 4f4a6d4588
1 changed files with 11 additions and 2 deletions
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13
indra/llui/lltexteditor.cpp
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@@ -551,8 +551,17 @@ void LLTextEditor::updateLineStartList(S32 startpos)
}
}
else
{
const llwchar* str = mWText.c_str() + start_idx;
{
//Scratch buffer. Avoid needless realloc.
static LLWString buf;
if(start_idx)
{
buf.resize(end_idx - start_idx);
std::copy(mWText.begin() + start_idx, mWText.begin() + end_idx, buf.begin());
}
const LLWString& str = start_idx ? buf : mWText;
S32 drawn = mGLFont->maxDrawableChars(str, (F32)abs(mTextRect.getWidth()) - line_width,
end_idx - start_idx, mWordWrap ? LLFontGL::WORD_BOUNDARY_IF_POSSIBLE : LLFontGL::ANYWHERE, mAllowEmbeddedItems );
if( 0 == drawn && line_width == start_x)