Re: LYNX-DEV ISMAP/USEMAP alt text

[Foteos Macrides]

Klaus Weide <address@hidden> wrote:
>On Mon, 7 Apr 1997, Foteos Macrides wrote:
>[...]
>>      If Klaus' patch is used, it needs code to eliminate the
>> associated Anchor for the server-side imagemap, and not yield a
>> dangling link when links_are_numbered is ON.  
>
>(I assume with "dangling" you mean just that it is not selectable
>because it has zero-length text.  If there is something left dangling
>in some other sense, pointing to nothing or similar, please clarify.)
>
>Yes, it is ugly to have that numbered link without being able to select
>it (other than by its number) and without indication what it is.
>But having just "[ISMAP]" and no way to change it is also ugly..
>I think default strings like "[IMAGE]" or "[LINK]" make some sense
>to a user who doesn't know any HTML (as long as he knows the English
>words), but "ISMAP" doesn't.
>
>If "code to eliminate the ... Anchor" means diving into GridText's
>(etc.)  form handling code and adding yet more special treatments
>there, then I cop out at this point.  Better to retract my patch then,
>unless somebody else wants to do that.

        Try adding the stuff indicated by my comment in GridText.c:

[...]
PUBLIC void HText_endAnchor ARGS1(
        HText *,        text)
{
    TextAnchor * a = text->last_anchor;
    if (a->number) {
        /*
         *  If it goes somewhere...
         */
        a->extent += text->chars + text->last_line->size - a->start;
        if (a->extent <= 2) {
            /*
             *  Might be a blank anchor from an ALT="" or an
             *  ignored ISMAP attribute due to a companion
             *  USEMAP. - FM
             */
            int j;
            a->show_anchor = NO;
            for (j = (text->last_line->size - a->extent);
                 text->last_line->data[j] != '\0'; j++) {
                if (!IsSpecialAttrChar(text->last_line->data[j])) {
                    a->show_anchor = YES;
                    break;
                }
            }
            /*
             *  If links are numbered and a->show_anchor is still NO,
             *  get rid of the numbered bracket and adjust the
             *  anchor count.  This code could fail if the anchor
             *  content caused a wrap, but that's highly unlikely,
             *  so for now, we won't check for that. - FM
             */
            if (a->show_anchor == NO && keypad_mode == LINKS_ARE_NUMBERED) {
                j = (text->last_line->size - a->extent - 1);
                if (j > 2 && text->last_line->data[j] == ']') {
                    j--;
                    while (isdigit((unsigned char)text->last_line->data[j]))
                        j--;
                    if (text->last_line->data[j] == '[') {
                        text->last_line->size = j;
                        text->last_line->data[text->last_line->size] = '\0';
                        a->number = 0;
                        text->last_anchor_number--;
                    }
                }
            }
[...]


        Although you used Hiram's suggestion to revive the link for
the server-side map if clickable_images is toggled ON, I don't see the
reasoning behind that.  The image applies to both the client-side MAP
and the server-side link (i.e, there's just one image, that a GUI would
have inlined, but Lynx needs to pass to a helper app or download when
clickable_images is toggled ON and its link is activated).  Don't you
want a configuration option, and command line toggle (and someday a
.lynxrc 'o'ption, when there's room for one 8-) for whether or not to
make the server-side link shown and activatable when a client-side
MAP is present?  Whatever that choice is should apply whether or not
clickable_images is ON?

                                Fote

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 Foteos Macrides            Worcester Foundation for Biomedical Research
 address@hidden         222 Maple Avenue, Shrewsbury, MA 01545
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