[feature request]: Support for function extension snippets

This plugin works well enough and very elegantly allows me to edit latex formulas.

If it could support function fragments, it would be perfect! My thoughts are as follows.

mxi(3) outputs a 3x3 unit matrix and mxi(6) outputs a 6x6 unit matrix.I can also customize h(3) to output three-level headings.

Also, it would be easier to debug and backup if the configuration file could be separated into an md file.

Thanks for any replies, I really love this plugin!

[artisticat1]

Anyway, I’m convinced you can handle this gracefully because you made this plugin to make me feel graceful, haha😆！If I can be of any help, just ask, I’m happy to do so. For example, manually testing the functionality and stability of new features.

Haha, thank you! I’d be happy to have help with testing. I’ll let you know when I have things ready.

So, I’ve come up with an idea for how to achieve this. To achieve your example with “a33pmx” above, here’s what it would look like.

We can use the regular expression

([A-Za-z])([0-9])([0-9])pmx

to match the string “a33pmx”. This regex captures the groups “a”, “3”, and “3”. I assume these are the symbol of the matrix, the number of rows, and the number of columns.

Then we can write a function in javascript that takes the inputs “a”, “3”, and “3” as parameters and generates the corresponding matrix output in LaTeX. The plugin will pass in the capture groups to the function as an array.

function genMatrix(captureGroups) {
  const [symbol, rows, columns] = captureGroups;

  let arr = [];
  for(let j = 0; j < rows; j++) {
      arr[j] = [];

      for(let i = 0; i < columns; i++) {
          arr[j][i] = `${symbol}_{${j+1}${i+1}}`;
      }
  }

  let output = arr.map(el => el.join(" & ")).join(" \\\\\n");
  output = `\\begin{pmatrix}\n${output}\n\\end{pmatrix}`;

  return output;
}

Finally, we put all this together in a snippet that we can run by typing “a33pmx<kbd>Tab</kbd>”.

{trigger: "([A-Za-z])([0-9])([0-9])pmx", replacement: `

function genMatrix(captureGroups) {
  const [symbol, rows, columns] = captureGroups;

  let arr = [];
  for(let j = 0; j < rows; j++) {
      arr[j] = [];

      for(let i = 0; i < columns; i++) {
          arr[j][i] = \`\${symbol}_{\${j+1}\${i+1}}\`;
      }
  }

  let output = arr.map(el => el.join(" & ")).join(" \\\\\n");
  output = \`\\begin{pmatrix}\n\${output}\n\\end{pmatrix}\`;

  return output;
}

`, options: "rmx"}

Similarly, we can create a snippet for unit matrices, as you suggested in your first post.

{trigger: "mxi([0-9])", replacement: `

function genMatrix(captureGroups) {
  const [N] = captureGroups;

  let arr = [];
  for(let j = 0; j < N; j++) {
      arr[j] = [];

      for(let i = 0; i < N; i++) {
          arr[j][i] = (i === j) ? 1 : 0;
      }
  }

  let output = arr.map(el => el.join(" & ")).join(" \\\\\n");
  output = \`\\begin{pmatrix}\n\${output}\n\\end{pmatrix}\`;

  return output;
}

`, options: "rmx"}

Here typing “mxi6<kbd>Tab</kbd>” will create a 6x6 unit matrix.

How does this sound?

[artisticat1]

It’s in the backlog at the moment, but any PRs to implement this would be welcome.