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isn
2024 Jun 01
2
Tools to modify highlighted areas in pdf documents?
...eonard
#########
library(zip)
con = file("_some_pdf_.pdf", "rb")
NL = 0
# - very dirty hack;
# - assumes Annotations are in the last fragment/chunk;
while(TRUE) {
tmp = readBin(con, "raw", 1024*128 + 515);
??????if(length(tmp) == 0) break;
??????x = tmp;
??????# isNL = (x == 10) | (x == 13);
??????isNL = (x == 13);
??????isNL = isNL & (x[which(isNL) + 1] == 10);
NL = NL + sum(isNL);
}
close(con)
idP = which(isNL)
idS = 935; # will vary with pdf and Annotations and ...;
nLast = 4; # usually 2 chunks
idx = idP[seq(idS, length.out = nLast)]
# Check: Ri...