show-hint.ts

// @ts-nocheck
// Because this code is originally javascript code.

// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: https://codemirror.net/LICENSE

// declare global: DOMRect

"use strict";

var HINT_ELEMENT_CLASS = "CodeMirror-hint";
var ACTIVE_HINT_ELEMENT_CLASS = "CodeMirror-hint-active";

// This is the old interface, kept around for now to stay
// backwards-compatible.
CodeMirror.showHint = function (cm, getHints, options) {
  if (!getHints) return cm.showHint(options);
  if (options && options.async) getHints.async = true;
  var newOpts = { hint: getHints };
  if (options) for (var prop in options) newOpts[prop] = options[prop];
  return cm.showHint(newOpts);
};

CodeMirror.defineExtension("showHint", function (options) {
  options = parseOptions(this, this.getCursor("start"), options);
  var selections = this.listSelections();
  if (selections.length > 1) return;
  // By default, don't allow completion when something is selected.
  // A hint function can have a `supportsSelection` property to
  // indicate that it can handle selections.
  if (this.somethingSelected()) {
    if (!options.hint.supportsSelection) return;
    // Don't try with cross-line selections
    for (var i = 0; i < selections.length; i++)
      if (selections[i].head.line != selections[i].anchor.line) return;
  }

  if (this.state.completionActive) this.state.completionActive.close();
  var completion = (this.state.completionActive = new Completion(
    this,
    options
  ));
  if (!completion.options.hint) return;

  CodeMirror.signal(this, "startCompletion", this);
  completion.update(true);
});

CodeMirror.defineExtension("closeHint", function () {
  if (this.state.completionActive) this.state.completionActive.close();
});

function Completion(cm, options) {
  this.cm = cm;
  this.options = options;
  this.widget = null;
  this.debounce = 0;
  this.tick = 0;
  this.startPos = this.cm.getCursor("start");
  this.startLen =
    this.cm.getLine(this.startPos.line).length - this.cm.getSelection().length;

  if (this.options.updateOnCursorActivity) {
    var self = this;
    cm.on(
      "cursorActivity",
      (this.activityFunc = function () {
        self.cursorActivity();
      })
    );
  }
}

var requestAnimationFrame =
  window.requestAnimationFrame ||
  function (fn) {
    return setTimeout(fn, 1000 / 60);
  };
var cancelAnimationFrame = window.cancelAnimationFrame || clearTimeout;

Completion.prototype = {
  close: function () {
    if (!this.active()) return;
    this.cm.state.completionActive = null;
    this.tick = null;
    if (this.options.updateOnCursorActivity) {
      this.cm.off("cursorActivity", this.activityFunc);
    }

    if (this.widget && this.data) CodeMirror.signal(this.data, "close");
    if (this.widget) this.widget.close();
    CodeMirror.signal(this.cm, "endCompletion", this.cm);
  },

  active: function () {
    return this.cm.state.completionActive == this;
  },

  pick: function (data, i) {
    var completion = data.list[i],
      self = this;
    this.cm.operation(function () {
      if (completion.hint) completion.hint(self.cm, data, completion);
      else
        self.cm.replaceRange(
          getText(completion),
          completion.from || data.from,
          completion.to || data.to,
          "complete"
        );
      CodeMirror.signal(data, "pick", completion);
      self.cm.scrollIntoView();
    });
    if (this.options.closeOnPick) {
      this.close();
    }
  },

  cursorActivity: function () {
    if (this.debounce) {
      cancelAnimationFrame(this.debounce);
      this.debounce = 0;
    }

    var identStart = this.startPos;
    if (this.data) {
      identStart = this.data.from;
    }

    var pos = this.cm.getCursor(),
      line = this.cm.getLine(pos.line);
    if (
      pos.line != this.startPos.line ||
      line.length - pos.ch != this.startLen - this.startPos.ch ||
      pos.ch < identStart.ch ||
      this.cm.somethingSelected() ||
      !pos.ch ||
      this.options.closeCharacters.test(line.charAt(pos.ch - 1))
    ) {
      this.close();
    } else {
      var self = this;
      this.debounce = requestAnimationFrame(function () {
        self.update();
      });
      if (this.widget) this.widget.disable();
    }
  },

  update: function (first) {
    if (this.tick == null) return;
    var self = this,
      myTick = ++this.tick;
    fetchHints(this.options.hint, this.cm, this.options, function (data) {
      if (self.tick == myTick) self.finishUpdate(data, first);
    });
  },

  finishUpdate: function (data, first) {
    if (this.data) CodeMirror.signal(this.data, "update");

    var picked =
      (this.widget && this.widget.picked) ||
      (first && this.options.completeSingle);
    if (this.widget) this.widget.close();

    this.data = data;

    if (data && data.list.length) {
      if (picked && data.list.length == 1) {
        this.pick(data, 0);
      } else {
        this.widget = new Widget(this, data);
        CodeMirror.signal(data, "shown");
      }
    }
  },
};

function parseOptions(cm, pos, options) {
  var editor = cm.options.hintOptions;
  var out = {};
  for (var prop in defaultOptions) out[prop] = defaultOptions[prop];
  if (editor)
    for (var prop in editor)
      if (editor[prop] !== undefined) out[prop] = editor[prop];
  if (options)
    for (var prop in options)
      if (options[prop] !== undefined) out[prop] = options[prop];
  if (out.hint.resolve) out.hint = out.hint.resolve(cm, pos);
  return out;
}

function getText(completion) {
  if (typeof completion == "string") return completion;
  else return completion.text;
}

function buildKeyMap(completion, handle) {
  var baseMap = {
    Up: function () {
      handle.moveFocus(-1);
    },
    Down: function () {
      handle.moveFocus(1);
    },
    PageUp: function () {
      handle.moveFocus(-handle.menuSize() + 1, true);
    },
    PageDown: function () {
      handle.moveFocus(handle.menuSize() - 1, true);
    },
    Home: function () {
      handle.setFocus(0);
    },
    End: function () {
      handle.setFocus(handle.length - 1);
    },
    Enter: handle.pick,
    Tab: handle.pick,
    Esc: handle.close,
  };

  var mac = /Mac/.test(navigator.platform);

  if (mac) {
    baseMap["Ctrl-P"] = function () {
      handle.moveFocus(-1);
    };
    baseMap["Ctrl-N"] = function () {
      handle.moveFocus(1);
    };
  }

  var custom = completion.options.customKeys;
  var ourMap = custom ? {} : baseMap;
  function addBinding(key, val) {
    var bound;
    if (typeof val != "string")
      bound = function (cm) {
        return val(cm, handle);
      };
    // This mechanism is deprecated
    else if (baseMap.hasOwnProperty(val)) bound = baseMap[val];
    else bound = val;
    ourMap[key] = bound;
  }
  if (custom)
    for (var key in custom)
      if (custom.hasOwnProperty(key)) addBinding(key, custom[key]);
  var extra = completion.options.extraKeys;
  if (extra)
    for (var key in extra)
      if (extra.hasOwnProperty(key)) addBinding(key, extra[key]);
  return ourMap;
}

function getHintElement(hintsElement, el) {
  while (el && el != hintsElement) {
    if (el.nodeName.toUpperCase() === "LI" && el.parentNode == hintsElement)
      return el;
    el = el.parentNode;
  }
}

function Widget(completion, data) {
  this.completion = completion;
  this.data = data;
  this.picked = false;
  var widget = this,
    cm = completion.cm;
  var ownerDocument = cm.getInputField().ownerDocument;
  var parentWindow = ownerDocument.defaultView || ownerDocument.parentWindow;

  var hints = (this.hints = ownerDocument.createElement("ul"));
  var theme = completion.cm.options.theme;
  hints.className = "CodeMirror-hints " + theme;
  this.selectedHint = data.selectedHint || 0;

  var completions = data.list;
  for (var i = 0; i < completions.length; ++i) {
    var elt = hints.appendChild(ownerDocument.createElement("li")),
      cur = completions[i];
    var className =
      HINT_ELEMENT_CLASS +
      (i != this.selectedHint ? "" : " " + ACTIVE_HINT_ELEMENT_CLASS);
    if (cur.className != null) className = cur.className + " " + className;
    elt.className = className;
    if (cur.render) cur.render(elt, data, cur);
    else
      elt.appendChild(
        ownerDocument.createTextNode(cur.displayText || getText(cur))
      );
    elt.hintId = i;
  }

  var container = completion.options.container || ownerDocument.body;
  var pos = cm.cursorCoords(
    completion.options.alignWithWord ? data.from : null
  );
  var left = pos.left,
    top = pos.bottom,
    below = true;
  var offsetLeft = 0,
    offsetTop = 0;
  if (container !== ownerDocument.body) {
    // We offset the cursor position because left and top are relative to the offsetParent's top left corner.
    var isContainerPositioned =
      ["absolute", "relative", "fixed"].indexOf(
        parentWindow.getComputedStyle(container).position
      ) !== -1;
    var offsetParent = isContainerPositioned
      ? container
      : container.offsetParent;
    var offsetParentPosition = offsetParent.getBoundingClientRect();
    var bodyPosition = ownerDocument.body.getBoundingClientRect();
    offsetLeft =
      offsetParentPosition.left - bodyPosition.left - offsetParent.scrollLeft;
    offsetTop =
      offsetParentPosition.top - bodyPosition.top - offsetParent.scrollTop;
  }
  hints.style.left = left - offsetLeft + "px";
  hints.style.top = top - offsetTop + "px";

  // If we're at the edge of the screen, then we want the menu to appear on the left of the cursor.
  var winW =
    parentWindow.innerWidth ||
    Math.max(
      ownerDocument.body.offsetWidth,
      ownerDocument.documentElement.offsetWidth
    );
  var winH =
    parentWindow.innerHeight ||
    Math.max(
      ownerDocument.body.offsetHeight,
      ownerDocument.documentElement.offsetHeight
    );
  container.appendChild(hints);

  var box = completion.options.moveOnOverlap
    ? hints.getBoundingClientRect()
    : new DOMRect();
  var scrolls = completion.options.paddingForScrollbar
    ? hints.scrollHeight > hints.clientHeight + 1
    : false;

  // Compute in the timeout to avoid reflow on init
  var startScroll;
  setTimeout(function () {
    startScroll = cm.getScrollInfo();
  });

  var overlapY = box.bottom - winH;
  if (overlapY > 0) {
    var height = box.bottom - box.top,
      curTop = pos.top - (pos.bottom - box.top);
    if (curTop - height > 0) {
      // Fits above cursor
      hints.style.top = (top = pos.top - height - offsetTop) + "px";
      below = false;
    } else if (height > winH) {
      hints.style.height = winH - 5 + "px";
      hints.style.top = (top = pos.bottom - box.top - offsetTop) + "px";
      var cursor = cm.getCursor();
      if (data.from.ch != cursor.ch) {
        pos = cm.cursorCoords(cursor);
        hints.style.left = (left = pos.left - offsetLeft) + "px";
        box = hints.getBoundingClientRect();
      }
    }
  }
  var overlapX = box.right - winW;
  if (overlapX > 0) {
    if (box.right - box.left > winW) {
      hints.style.width = winW - 5 + "px";
      overlapX -= box.right - box.left - winW;
    }
    hints.style.left = (left = pos.left - overlapX - offsetLeft) + "px";
  }
  if (scrolls)
    for (var node = hints.firstChild; node; node = node.nextSibling)
      node.style.paddingRight = cm.display.nativeBarWidth + "px";

  cm.addKeyMap(
    (this.keyMap = buildKeyMap(completion, {
      moveFocus: function (n, avoidWrap) {
        widget.changeActive(widget.selectedHint + n, avoidWrap);
      },
      setFocus: function (n) {
        widget.changeActive(n);
      },
      menuSize: function () {
        return widget.screenAmount();
      },
      length: completions.length,
      close: function () {
        completion.close();
      },
      pick: function () {
        widget.pick();
      },
      data: data,
    }))
  );

  if (completion.options.closeOnUnfocus) {
    var closingOnBlur;
    cm.on(
      "blur",
      (this.onBlur = function () {
        closingOnBlur = setTimeout(function () {
          completion.close();
        }, 100);
      })
    );
    cm.on(
      "focus",
      (this.onFocus = function () {
        clearTimeout(closingOnBlur);
      })
    );
  }

  cm.on(
    "scroll",
    (this.onScroll = function () {
      var curScroll = cm.getScrollInfo(),
        editor = cm.getWrapperElement().getBoundingClientRect();
      var newTop = top + startScroll.top - curScroll.top;
      var point =
        newTop -
        (parentWindow.pageYOffset ||
          (ownerDocument.documentElement || ownerDocument.body).scrollTop);
      if (!below) point += hints.offsetHeight;
      if (point <= editor.top || point >= editor.bottom)
        return completion.close();
      hints.style.top = newTop + "px";
      hints.style.left = left + startScroll.left - curScroll.left + "px";
    })
  );

  CodeMirror.on(hints, "dblclick", function (e) {
    var t = getHintElement(hints, e.target || e.srcElement);
    if (t && t.hintId != null) {
      widget.changeActive(t.hintId);
      widget.pick();
    }
  });

  CodeMirror.on(hints, "click", function (e) {
    var t = getHintElement(hints, e.target || e.srcElement);
    if (t && t.hintId != null) {
      widget.changeActive(t.hintId);
      if (completion.options.completeOnSingleClick) widget.pick();
    }
  });

  CodeMirror.on(hints, "mousedown", function () {
    setTimeout(function () {
      cm.focus();
    }, 20);
  });

  // The first hint doesn't need to be scrolled to on init
  var selectedHintRange = this.getSelectedHintRange();
  if (selectedHintRange.from !== 0 || selectedHintRange.to !== 0) {
    this.scrollToActive();
  }

  CodeMirror.signal(
    data,
    "select",
    completions[this.selectedHint],
    hints.childNodes[this.selectedHint]
  );
  return true;
}

Widget.prototype = {
  close: function () {
    if (this.completion.widget != this) return;
    this.completion.widget = null;
    this.hints.parentNode.removeChild(this.hints);
    this.completion.cm.removeKeyMap(this.keyMap);

    var cm = this.completion.cm;
    if (this.completion.options.closeOnUnfocus) {
      cm.off("blur", this.onBlur);
      cm.off("focus", this.onFocus);
    }
    cm.off("scroll", this.onScroll);
  },

  disable: function () {
    this.completion.cm.removeKeyMap(this.keyMap);
    var widget = this;
    this.keyMap = {
      Enter: function () {
        widget.picked = true;
      },
    };
    this.completion.cm.addKeyMap(this.keyMap);
  },

  pick: function () {
    this.completion.pick(this.data, this.selectedHint);
  },

  changeActive: function (i, avoidWrap) {
    if (i >= this.data.list.length)
      i = avoidWrap ? this.data.list.length - 1 : 0;
    else if (i < 0) i = avoidWrap ? 0 : this.data.list.length - 1;
    if (this.selectedHint == i) return;
    var node = this.hints.childNodes[this.selectedHint];
    if (node)
      node.className = node.className.replace(
        " " + ACTIVE_HINT_ELEMENT_CLASS,
        ""
      );
    node = this.hints.childNodes[(this.selectedHint = i)];
    node.className += " " + ACTIVE_HINT_ELEMENT_CLASS;
    this.scrollToActive();
    CodeMirror.signal(
      this.data,
      "select",
      this.data.list[this.selectedHint],
      node
    );
  },

  scrollToActive: function () {
    var selectedHintRange = this.getSelectedHintRange();
    var node1 = this.hints.childNodes[selectedHintRange.from];
    var node2 = this.hints.childNodes[selectedHintRange.to];
    var firstNode = this.hints.firstChild;
    if (node1.offsetTop < this.hints.scrollTop)
      this.hints.scrollTop = node1.offsetTop - firstNode.offsetTop;
    else if (
      node2.offsetTop + node2.offsetHeight >
      this.hints.scrollTop + this.hints.clientHeight
    )
      this.hints.scrollTop =
        node2.offsetTop +
        node2.offsetHeight -
        this.hints.clientHeight +
        firstNode.offsetTop;
  },

  screenAmount: function () {
    return (
      Math.floor(
        this.hints.clientHeight / this.hints.firstChild.offsetHeight
      ) || 1
    );
  },

  getSelectedHintRange: function () {
    var margin = this.completion.options.scrollMargin || 0;
    return {
      from: Math.max(0, this.selectedHint - margin),
      to: Math.min(this.data.list.length - 1, this.selectedHint + margin),
    };
  },
};

function applicableHelpers(cm, helpers) {
  if (!cm.somethingSelected()) return helpers;
  var result = [];
  for (var i = 0; i < helpers.length; i++)
    if (helpers[i].supportsSelection) result.push(helpers[i]);
  return result;
}

function fetchHints(hint, cm, options, callback) {
  if (hint.async) {
    hint(cm, callback, options);
  } else {
    var result = hint(cm, options);
    if (result && result.then) result.then(callback);
    else callback(result);
  }
}

function resolveAutoHints(cm, pos) {
  var helpers = cm.getHelpers(pos, "hint"),
    words;
  if (helpers.length) {
    var resolved = function (cm, callback, options) {
      var app = applicableHelpers(cm, helpers);
      function run(i) {
        if (i == app.length) return callback(null);
        fetchHints(app[i], cm, options, function (result) {
          if (result && result.list.length > 0) callback(result);
          else run(i + 1);
        });
      }
      run(0);
    };
    resolved.async = true;
    resolved.supportsSelection = true;
    return resolved;
  } else if ((words = cm.getHelper(cm.getCursor(), "hintWords"))) {
    return function (cm) {
      return CodeMirror.hint.fromList(cm, { words: words });
    };
  } else if (CodeMirror.hint.anyword) {
    return function (cm, options) {
      return CodeMirror.hint.anyword(cm, options);
    };
  } else {
    return function () {};
  }
}

CodeMirror.registerHelper("hint", "auto", {
  resolve: resolveAutoHints,
});

CodeMirror.registerHelper("hint", "fromList", function (cm, options) {
  var cur = cm.getCursor(),
    token = cm.getTokenAt(cur);
  var term,
    from = CodeMirror.Pos(cur.line, token.start),
    to = cur;
  if (
    token.start < cur.ch &&
    /\w/.test(token.string.charAt(cur.ch - token.start - 1))
  ) {
    term = token.string.substr(0, cur.ch - token.start);
  } else {
    term = "";
    from = cur;
  }
  var found = [];
  for (var i = 0; i < options.words.length; i++) {
    var word = options.words[i];
    if (word.slice(0, term.length) == term) found.push(word);
  }

  if (found.length) return { list: found, from: from, to: to };
});

CodeMirror.commands.autocomplete = CodeMirror.showHint;

var defaultOptions = {
  hint: CodeMirror.hint.auto,
  completeSingle: true,
  alignWithWord: true,
  closeCharacters: /[\s()\[\]{};:>,]/,
  closeOnPick: true,
  closeOnUnfocus: true,
  updateOnCursorActivity: true,
  completeOnSingleClick: true,
  container: null,
  customKeys: null,
  extraKeys: null,
  paddingForScrollbar: true,
  moveOnOverlap: true,
};

CodeMirror.defineOption("hintOptions", null);