fix spaceCount calculation

[Remi-p]

Hi! Thank you for this repository (:.

It seems we encountered a bug with my colleagues (cc: @luiscardosooliveira).

The error was:

    RangeError: Invalid array length
      at parsePageItems (node_modules/pdf-text-reader/dist/index.js:93:25)
      at parsePage (node_modules/pdf-text-reader/dist/index.js:31:12)
      at async readPdfText (node_modules/pdf-text-reader/dist/index.js:17:20)

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After investigating a little, it seems like lastItem.height can be equal to 0.

This leads to spaceCount being equal to Infinity (from line: )

pdf-text-reader/src/index.ts

Line 156 in 06c35be

const spaceCountB = Math.ceil(xDiff / lastItem.height);

As we're doing an Array(spaceCount) afterwards, it makes the library throw an error.

pdf-text-reader/src/index.ts

Line 159 in 06c35be

line += Array(spaceCount).fill('').join(' ');

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Adding a condition on lastItem.height !== 0 corrects the behavior.

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npm run test was launched and didn't return any errors. Please feel free to tell us if it's OK for you!

[electrovir]

Nice work! Thank you!

[electrovir]

This has been included in version 3.0.2: https://www.npmjs.com/package/pdf-text-reader/v/3.0.2