Highlighting occurrences of a string in a Tkinter textField-CodePudding

I have a regex pattern return a list of all the start and stop indices of an occurring string and I want to be able to highlight each occurrence, it's extremely slow with my current setup — using a 133,000 line file it takes about 8 minutes to highlight all occurrences.

Here's my current solution:

if IPv == 4:
    v4FoundUnique = v4FoundUnique   1
    # highlight all regions found
    for j in range(qty):
        v4Found = v4Found   1
        # don't highlight if they set the checkbox not to
        if highlightText:
            # get row.column coordinates of start and end of match
            # very slow
            startIndex = textField.index('1.0   {} chars'.format(starts[j]))
            # compute end based on start, using assumption that IP addresses
            # won't span lines drastically faster than computing from raw index
            endIndex = "{}.{}".format(startIndex.split(".")[0],
                                      int(startIndex.split(".")[1])   stops[j]-starts[j])
            # apply tag
            textField.tag_add("{}v4".format("public" if isPublic else "private"),
                              startIndex, endIndex)

CodePudding user response：

So, TKinter has a pretty bad implementation of changing "absolute location" to its row.column format:

startIndex = textField.index('1.0   {} chars'.format(starts[j]))

it's actually faster to do it like this:

for address in v4check.finditer(filetxt):
    # address.group() returns matching text
    # address.span() returns the indices (start,stop)
    start,stop = address.span()
    ip = address.group()
    srow = filetxt.count("\n",0,start) 1
    scol = start-filetxt.rfind("\n",0,start)-1
    start = "{}.{}".format(srow,scol)
    stop = "{}.{}".format(srow,scol len(ip))

which takes the regex results and the input file to get the data we need (row.colum)

There could be a faster way of doing this but this is the solution I found that works!