Lua Requires Chilkat v11.7.0+

Code Blocks and Code Spans in PDF to Markdown

See more PDF Text Extraction Examples

Demonstrates how monospaced text is converted by the "markdown" operation: a monospaced block becomes a fenced code block and a monospaced run inside a sentence becomes a code span. Set "code" to false to treat it as ordinary text. 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 code_block.pdf

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

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

success = pdf:extract_text("markdown", json, jsonOut)
if not success then
    print(pdf.last_error_text)
    return
end

print("---- default (code: true) ----")
print(jsonOut:string_of("markdown"))

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

print("---- code: false ----")
print(jsonOut:string_of("markdown"))

-- Sample output:

-- ---- default (code: true) ----
-- <!-- page 1 -->
--
-- # Extracting Text
--
-- Load the PDF and call `ExtractText` with the operation and an options object. The result is returned as JSON:
--
-- ```
-- new Pdf pdf;
-- success = pdf.LoadFile("report.pdf");
-- new JsonObject json;
-- new JsonObject jsonOut;
-- success = pdf.ExtractText("text",json,jsonOut);
-- println jsonOut.StringOf("text");
-- ```
--
-- An empty options object extracts every page with the default clean-up. Set `pages` to limit the extraction.
-- ---- code: false ----
-- <!-- page 1 -->
--
-- # Extracting Text
--
-- Load the PDF and call ExtractText with the operation and an options object. The result is returned as JSON:
--
-- new Pdf pdf; success = pdf.LoadFile("report.pdf"); new JsonObject json; new JsonObject jsonOut; success = pdf.ExtractText("text",json,jsonOut); println jsonOut.StringOf("text");
--
-- An empty options object extracts every page with the default clean-up. Set pages to limit the extraction.