1 files changed, 0 insertions, 182 deletions
diff --git a/app/assets/javascripts/helpers/indent_helper.js b/app/assets/javascripts/helpers/indent_helper.js
deleted file mode 100644
index a8815fac04e..00000000000
--- a/app/assets/javascripts/helpers/indent_helper.js
+++ /dev/null
@@ -1,182 +0,0 @@
-const INDENT_SEQUENCE = '    ';
-
-function countLeftSpaces(text) {
-  const i = text.split('').findIndex(c => c !== ' ');
-  return i === -1 ? text.length : i;
-}
-
-/**
- * IndentHelper provides methods that allow manual and smart indentation in
- * textareas. It supports line indent/unindent, selection indent/unindent,
- * auto indentation on newlines, and smart deletion of indents with backspace.
- */
-export default class IndentHelper {
-  /**
-   * Creates a new IndentHelper and binds it to the given `textarea`. You can provide a custom indent sequence in the second parameter, but the `newline` and `backspace` operations may work funny if the indent sequence isn't spaces only.
-   */
-  constructor(textarea, indentSequence = INDENT_SEQUENCE) {
-    this.element = textarea;
-    this.seq = indentSequence;
-  }
-
-  getSelection() {
-    return { start: this.element.selectionStart, end: this.element.selectionEnd };
-  }
-
-  isRangeSelection() {
-    return this.element.selectionStart !== this.element.selectionEnd;
-  }
-
-  /**
-   * Re-implementation of textarea's setRangeText method, because IE/Edge don't support it.
-   *
-   * @see https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#dom-textarea%2Finput-setrangetext
-   */
-  setRangeText(replacement, start, end, selectMode) {
-    // Disable eslint to remain as faithful as possible to the above linked spec
-    /* eslint-disable no-param-reassign, no-case-declarations */
-    const text = this.element.value;
-
-    if (start > end) {
-      throw new RangeError('setRangeText: start index must be less than or equal to end index');
-    }
-
-    // Clamp to [0, len]
-    start = Math.max(0, Math.min(start, text.length));
-    end = Math.max(0, Math.min(end, text.length));
-
-    let selection = { start: this.element.selectionStart, end: this.element.selectionEnd };
-
-    this.element.value = text.slice(0, start) + replacement + text.slice(end);
-
-    const newLength = replacement.length;
-    const newEnd = start + newLength;
-
-    switch (selectMode) {
-      case 'select':
-        selection = { start, newEnd };
-        break;
-      case 'start':
-        selection = { start, end: start };
-        break;
-      case 'end':
-        selection = { start: newEnd, end: newEnd };
-        break;
-      case 'preserve':
-      default:
-        const oldLength = end - start;
-        const delta = newLength - oldLength;
-        if (selection.start > end) {
-          selection.start += delta;
-        } else if (selection.start > start) {
-          selection.start = start;
-        }
-        if (selection.end > end) {
-          selection.end += delta;
-        } else if (selection.end > start) {
-          selection.end = newEnd;
-        }
-    }
-
-    this.element.setSelectionRange(selection.start, selection.end);
-
-    /* eslint-enable no-param-reassign, no-case-declarations */
-  }
-
-  /**
-   * Returns an array of lines in the textarea, with information about their
-   * start/end offsets and whether they are included in the current selection.
-   */
-  splitLines() {
-    const { start, end } = this.getSelection();
-
-    const lines = this.element.value.split('\n');
-    let textStart = 0;
-    const lineObjects = [];
-    lines.forEach(line => {
-      const lineObj = {
-        text: line,
-        start: textStart,
-        end: textStart + line.length,
-      };
-      lineObj.inSelection = lineObj.start <= end && lineObj.end >= start;
-      lineObjects.push(lineObj);
-      textStart += line.length + 1;
-    });
-    return lineObjects;
-  }
-
-  /**
-   * Indents selected lines by one level.
-   */
-  indent() {
-    const { start } = this.getSelection();
-
-    const selectedLines = this.splitLines().filter(line => line.inSelection);
-    if (!this.isRangeSelection() && start === selectedLines[0].start) {
-      // Special case: if cursor is at the beginning of the line, move it one
-      // indent right.
-      const line = selectedLines[0];
-      this.setRangeText(this.seq, line.start, line.start, 'end');
-    } else {
-      selectedLines.reverse();
-      selectedLines.forEach(line => {
-        this.setRangeText(INDENT_SEQUENCE, line.start, line.start, 'preserve');
-      });
-    }
-  }
-
-  /**
-   * Unindents selected lines by one level.
-   */
-  unindent() {
-    const lines = this.splitLines().filter(line => line.inSelection);
-    lines.reverse();
-    lines
-      .filter(line => line.text.startsWith(this.seq))
-      .forEach(line => {
-        this.setRangeText('', line.start, line.start + this.seq.length, 'preserve');
-      });
-  }
-
-  /**
-   * Emulates a newline keypress, automatically indenting the new line.
-   */
-  newline() {
-    const { start, end } = this.getSelection();
-
-    if (this.isRangeSelection()) {
-      // Manually kill the selection before calculating the indent
-      this.setRangeText('', start, end, 'start');
-    }
-
-    // Auto-indent the next line
-    const currentLine = this.splitLines().find(line => line.end >= start);
-    const spaces = countLeftSpaces(currentLine.text);
-    this.setRangeText(`\n${' '.repeat(spaces)}`, start, start, 'end');
-  }
-
-  /**
-   * If the cursor is positioned at the end of a line's leading indents,
-   * emulates a backspace keypress by deleting a single level of indents.
-   * @param event The DOM KeyboardEvent that triggers this action, or null.
-   */
-  backspace(event) {
-    const { start } = this.getSelection();
-
-    // If the cursor is at the end of leading indents, delete an indent.
-    if (!this.isRangeSelection()) {
-      const currentLine = this.splitLines().find(line => line.end >= start);
-      const cursorPosition = start - currentLine.start;
-      if (countLeftSpaces(currentLine.text) === cursorPosition && cursorPosition > 0) {
-        if (event) event.preventDefault();
-
-        let spacesToDelete = cursorPosition % this.seq.length;
-        if (spacesToDelete === 0) {
-          spacesToDelete = this.seq.length;
-        }
-        this.setRangeText('', start - spacesToDelete, start, 'start');
-      }
-    }
-  }
-}