def revert_mhchem(document):
"Revert mhchem loading to preamble code"
- i = 0
- j = 0
- k = 0
+
mhchem = "off"
- i = find_token(document.header, "\\use_mhchem 1", 0)
- if i != -1:
+ i = find_token(document.header, "\\use_mhchem", 0)
+ if i == -1:
+ document.warning("Malformed LyX document: Could not find mhchem setting.")
mhchem = "auto"
else:
- i = find_token(document.header, "\\use_mhchem 2", 0)
- if i != -1:
+ val = get_value(document.header, "\\use_mhchem", i)
+ if val == "1":
+ mhchem = "auto"
+ elif val == "2":
mhchem = "on"
+ del document.header[i]
+
if mhchem == "auto":
- j = find_token(document.body, "\\cf{", 0)
- if j != -1:
- mhchem = "on"
- else:
- j = find_token(document.body, "\\ce{", 0)
- if j != -1:
- mhchem = "on"
+ i = 0
+ while True:
+ i = find_token(document.body, "\\begin_inset Formula", i)
+ line = document.body[i]
+ if line.find("\\ce{") != -1 or line.find("\\cf{") != 1:
+ mhchem = "on"
+ break
+
if mhchem == "on":
- add_to_preamble(document, ["% this command was inserted by lyx2lyx"])
- add_to_preamble(document, ["\\PassOptionsToPackage{version=3}{mhchem}"])
- add_to_preamble(document, ["\\usepackage{mhchem}"])
- k = find_token(document.header, "\\use_mhchem", 0)
- if k == -1:
- document.warning("Malformed LyX document: Could not find mhchem setting.")
- return
- del document.header[k]
+ pre = ["% lyx2lyx mhchem commands",
+ "\\PassOptionsToPackage{version=3}{mhchem}",
+ "\\usepackage{mhchem}"]
+ add_to_preamble(document, pre)
def revert_fontenc(document):