Reviewed by Maciej

    Reviewed by Maciej

        Fix for this bug:

        <rdar://problem/4059384> Cannot place insertion point correctly in editable text that avoids floating elements

        Note: I strongly suspect this bug blocks a complete solution to this other Tiger/P2:
        <rdar://problem/4055748> AX: Dictionary pop-up panel shows at wrong place on specific parts of particular pages

        * khtml/rendering/render_text.cpp:
        (RenderText::caretRect): Change the y-coordinate used to calculate the available width for a line. Height is wrong.
        Top of the box containing the text where the click is done is correct. Also, add in the x-offset for the start
        of the text box when calculating the available width. If this text box is avoiding a float at the y-coordinate
        for the relevant box, failure to add in the amount of float-avoidance will make the text at the coordinates
        greater than end-of-line minus float-avoidance ineligible for caret placement.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@8937 268f45cc-cd09-0410-ab3c-d52691b4dbfc