Lua Requires Chilkat v11.7.0+

Rejoin Words Hyphenated at Line Ends

See more PDF Text Extraction Examples

Demonstrates the "dehyphenate" clean-up option (true by default). A word broken at the end of a line ("docu-" / "ment") is rejoined, while a hyphen that belongs to the word ("self-service") is kept. Set the option to false to keep the lines exactly as printed. Lua

local chilkat = require("chilkat")

-- This example requires the Chilkat API to have been previously unlocked.
-- See Global Unlock Sample for sample code.

-- The PDF used in this example is available at hyphenated.pdf

local pdf = chilkat.Pdf.new()
local success = pdf:load_file("qa_data/pdf/hyphenated.pdf")
if not success then
    print(pdf.last_error_text)
    return
end

local json = chilkat.JsonObject.new()
local jsonOut = chilkat.JsonObject.new()

-- The paragraph breaks "document", "self-service", "underlying" and "re-issued" at line ends.
-- The default rejoins them.  "self-service" keeps its hyphen because the word appears with it,
-- unbroken, elsewhere on the page; "re-issued" appears nowhere else, so it becomes "reissued".
success = pdf:extract_text("text", json, jsonOut)
if not success then
    print(pdf.last_error_text)
    return
end

print("---- default (dehyphenate: true) ----")
print(jsonOut:string_of("text"))

json:update_bool("dehyphenate", false)
success = pdf:extract_text("text", json, jsonOut)
if not success then
    print(pdf.last_error_text)
    return
end

print("---- dehyphenate: false ----")
print(jsonOut:string_of("text"))

-- Sample output:

-- ---- default (dehyphenate: true) ----
-- Self-Service Kiosk Notes
--
-- The new self-service kiosk in the lobby prints a visitor badge from the document number on the reservation. Staff should direct first-time visitors to the self-service kiosk rather than the desk, and should keep the paper tray topped up. The underlying software restarts itself overnight; a badge that fails to print is reissued at the desk on request.
-- ---- dehyphenate: false ----
-- Self-Service Kiosk Notes
--
-- The new self-service kiosk in the lobby prints a visitor badge from the docu- ment number on the reservation. Staff should direct first-time visitors to the self- service kiosk rather than the desk, and should keep the paper tray topped up. The under- lying software restarts itself overnight; a badge that fails to print is re- issued at the desk on request.