WebCore/ChangeLog

2009-09-14  Shu Chang  <Chang.Shu@nokia.com>

        Reviewed by NOBODY (OOPS!).

        Need a short description and bug URL (OOPS!)

        Optimize the code so only the text from start to end is scaned.

        https://bugs.webkit.org/show_bug.cgi?id=29092

        On a platform with webkit+Qt+Symbian, the parsing time for a 600K text

        file improved 90% and overall loading time improved 20%.

        Ran WebKitTools/Scripts/run-webkit-tests, and no new problem was found.

        * dom/Text.cpp:

        (WebCore::Text::createWithLengthLimit):

2009-09-14  Yael Aharon  <yael.aharon@nokia.com>

        Reviewed by Tor Arne Vestbø.

48354

WebCore/dom/Text.cpp

@@PassRefPtr<Text> Text::createWithLengthL

    unsigned end = start + min(charsLeft, maxChars);

    // Check we are not on an unbreakable boundary.

    TextBreakIterator* it = characterBreakIterator(data.characters(), dataLength);

    if (end < dataLength && !isTextBreak(it, end))

        end = textBreakPreceding(it, end);

    if(end < dataLength) {

        TextBreakIterator* it = characterBreakIterator(data.characters() + start, end - start + 1);

        if (!isTextBreak(it, end - start))

            end = textBreakPreceding(it, end - start) + start;

    }

    // If we have maxChars of unbreakable characters the above could lead to

    // an infinite loop.

    // FIXME: It would be better to just have the old value of end before calling

48354