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Fix math package conversion to 2.0 format

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When doing the lyx2lyx round trip of the 2.0.8 user guide from format
413 -> 474 -> 413 you get an invalid document, because the math packages
mhchem and undertilde are incorrectly converted.
It turned out that the old reversion code did only work for particular
package oderings. The new one works for abitrary sorted packages.
(cherry picked from commit d47a556b46)

Conflicts:
	status.21x
This commit is contained in:
Georg Baum 2014-04-27 18:08:24 +02:00 committed by Richard Heck
parent 602a37af48
commit 493dab6881
1 changed files with 13 additions and 5 deletions
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16
lib/lyx2lyx/lyx_2_1.py
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@ -546,18 +546,26 @@ def convert_use_packages(document):
def revert_use_packages(document):
"use_package xxx yyy => use_xxx yyy"
packages = ["amsmath", "esint", "mathdots", "mhchem", "undertilde"]
packages = ["amsmath", "esint", "mhchem", "mathdots", "undertilde"]
# the order is arbitrary for the use_package version, and not all packages need to be given.
# Ensure a complete list and correct order (important for older LyX versions and especially lyx2lyx)
j = 0
# first loop: find line with first package
j = -1
for p in packages:
regexp = re.compile(r'(\\use_package\s+%s)' % p)
i = find_re(document.header, regexp, j)
i = find_re(document.header, regexp, 0)
if i != -1 and (j < 0 or i < j):
j = i
# second loop: replace or insert packages in front of all existing ones
for p in packages:
regexp = re.compile(r'(\\use_package\s+%s)' % p)
i = find_re(document.header, regexp, 0)
if i != -1:
value = get_value(document.header, "\\use_package %s" % p, i).split()[1]
del document.header[i]
j = i
document.header.insert(j, "\\use_%s %s" % (p, value))
else:
document.header.insert(j, "\\use_%s 1" % p)
j += 1