On Wed, 13 Jan 2016 23:18:03 +0100
Pablo Rodriguez <oi...@gmx.es> wrote:
> which is the difference between \doiftext and \doifempty?
First of all, the logic is reversed, \doiftext prints the second
argument if the first one contains text, \doifempty does print the
second argument if the first one *does not* contain anything. You can
get around this by using the \…else versions.
Then, the major difference is that \doifempty checks if the argument
is empty and nothing else. \doiftext checks if it contains a box of
non-zero width.
\starttext
text: \doiftextelse{foo}{is text}{no text}\par
text: \doifemptyelse{foo}{is empty}{not empty}\par
empty: \doiftextelse{}{is text}{no text}\par
empty: \doifemptyelse{}{is empty}{not empty}\par
space: \doiftextelse{\space}{is text}{no text}\par
space: \doifemptyelse{\space}{is empty}{not empty}\par
zero width: \doiftextelse{\framed[width=0cm]{frame}}{is text}{no text}\par
zero width: \doifemptyelse{\framed[width=0cm]{frame}}{is empty}{not empty}\par
image: \doiftextelse{\externalfigure[cow]}{is text}{no text}\par
image: \doifemptyelse{\externalfigure[cow]}{is empty}{not empty}\par
\stoptext
Marco
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