mtext_pop_prop(3) Pop a text property.

SYNOPSIS

int mtext_pop_prop (MText * mt, int from, int to, MSymbol key)

DESCRIPTION

Pop a text property. The mtext_pop_prop() function removes the topmost text property whose key is key from the characters between from (inclusive) and and to (exclusive) in mt.

This function does nothing if characters in the region have no such text property. With this function, 

                    FROM                    TO
M-text: |<------------|-------- MT ---------|------------>|
PROP  :  <------------------ OLD_VAL -------------------->

becomes 

                    FROM                    TO
M-text: |<------------|-------- MT ---------|------------>|
PROP  :  <--OLD_VAL-->|                     |<--OLD_VAL-->|

RETURN VALUE

If the operation was successful, mtext_pop_prop() return 0. Otherwise it returns -1 and assigns an error code to the external variable merror_code.

ERRORS

MERROR_RANGE, MERROR_SYMBOL

COPYRIGHT

Copyright (C) 2001 Information-technology Promotion Agency (IPA)
Copyright (C) 2001-2011 National Institute of Advanced Industrial Science and Technology (AIST)
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License <http://www.gnu.org/licenses/fdl.html>.

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