Question

假设我有以下带有两个CodeMirror实例的简单页面：

const body = document.querySelector('body')

const title = document.createElement('h1')
title.textContent = 'This is a document with multiple CodeMirrors'
body.appendChild(title);

const area1 = document.createElement('textarea')
body.appendChild(area1)
const editor1 = CodeMirror.fromTextArea(area1, {
  lineNumbers: true,
})

const segway = document.createElement('h2')
segway.textContent = 'Moving on to another editor'
body.appendChild(segway)


const area2 = document.createElement('textarea')
body.appendChild(area2)
const editor2 = CodeMirror.fromTextArea(area2, {
  lineNumbers: true,
})

我已经包括

codemirror/addon/search/search
codemirror/addon/search/searchcursor
codemirror/addon/dialog/dialog

每个CodeMirror实例现在都有自己的搜索处理程序，专注于编辑器（通过ctrl / cmd -f触发）。我如何实现跨多个CodeMirror实例的搜索/替换？

至少有一种方法可以在每个编辑器上执行find：editor.execCommand。我没有看到传递给它的方法，也没有查询可用的结果。

CodePen with example code and imports

GitHub issue for project wanting to use this, nteract

在CodeMirror issue Marijn陈述＆＃34;你必须自己编码。＆＃34;，这是公平的 - 我不确定如何处理这个问题。< / p>

Answer 1

查找和替换命令链接到对话框插件，似乎不是一种访问它们的方式通过实例，至少没有通过对话框传递的查询。

但是你可以恢复search.js中的大部分内容并将其添加为扩展名，您可以向其传递查询。但是，您需要设置一个全局对话框或一种获取非实例相关的查询的方法，并在每个实例上运行它。这样的东西应该有用，这只是用于搜索，但替换也应该很容易：

CodeMirror.defineExtension('search', function(query) {

  // This is all taken from search.js, pretty much as is for the first part.
  function SearchState() {
    this.posFrom = this.posTo = this.lastQuery = this.query = null;
    this.overlay = null;
  }

  function getSearchState(cm) {
    return cm.state.search || (cm.state.search = new SearchState());
  }

  function searchOverlay(query, caseInsensitive) {
    if (typeof query == "string")
      query = new RegExp(query.replace(/[\-\[\]\/\{\}\(\)\*\+\?\.\\\^\$\|]/g, "\\$&"), caseInsensitive ? "gi" : "g");
    else if (!query.global)
      query = new RegExp(query.source, query.ignoreCase ? "gi" : "g");

    return {
      token: function(stream) {
        query.lastIndex = stream.pos;
        var match = query.exec(stream.string);
        if (match && match.index == stream.pos) {
          stream.pos += match[0].length || 1;
          return "searching";
        } else if (match) {
          stream.pos = match.index;
        } else {
          stream.skipToEnd();
        }
      }
    };
  }

  function queryCaseInsensitive(query) {
    return typeof query == "string" && query == query.toLowerCase();
  }

  function parseString(string) {
    return string.replace(/\\(.)/g, function(_, ch) {
      if (ch == "n") return "\n"
      if (ch == "r") return "\r"
      return ch
    })
  }

  function parseQuery(query) {
    var isRE = query.match(/^\/(.*)\/([a-z]*)$/);
    if (isRE) {
      try {
        query = new RegExp(isRE[1], isRE[2].indexOf("i") == -1 ? "" : "i");
      } catch (e) {} // Not a regular expression after all, do a string search
    } else {
      query = parseString(query)
    }
    if (typeof query == "string" ? query == "" : query.test(""))
      query = /x^/;
    return query;
  }

  // From here it's still from search.js, but a bit tweaked so it applies
  // as an extension, these are basically clearSearch and startSearch.
  var state = getSearchState(this);
  state.lastQuery = state.query;
  state.query = state.queryText = null;
  this.removeOverlay(state.overlay);
  if (state.annotate) {
    state.annotate.clear();
    state.annotate = null;
  }

  state.queryText = query;
  state.query = parseQuery(query);
  this.removeOverlay(state.overlay, queryCaseInsensitive(state.query));
  state.overlay = searchOverlay(state.query, queryCaseInsensitive(state.query));

  this.addOverlay(state.overlay);
  if (this.showMatchesOnScrollbar) {
    if (state.annotate) {
      state.annotate.clear();
      state.annotate = null;
    }
    state.annotate = this.showMatchesOnScrollbar(state.query, queryCaseInsensitive(state.query));
  }
});

// this is to have an external input, but you could have your own way of
// providing your query. Important thing is that you can run search on
// an instance with a query.
const body = document.querySelector('body')
const searchAll = document.createElement('input');
body.appendChild(searchAll);
searchAll.placeholder = 'Search All';
searchAll.addEventListener('input', function(e) {
  var query = e.target.value;
  var codeMirrorInstances = document.getElementsByClassName('CodeMirror');
  for (var i = 0; i < codeMirrorInstances.length; i++) {
    var curInst = codeMirrorInstances[i].CodeMirror;
    curInst.search(query);
  }
});

const title = document.createElement('h1')
title.textContent = 'This is a document with multiple CodeMirrors'
body.appendChild(title);

const area1 = document.createElement('textarea')
body.appendChild(area1)
const editor1 = CodeMirror.fromTextArea(area1, {
  lineNumbers: true,
})

const segway = document.createElement('h2')
segway.textContent = 'Moving on to another editor'
body.appendChild(segway)

const area2 = document.createElement('textarea')
body.appendChild(area2)
const editor2 = CodeMirror.fromTextArea(area2, {
  lineNumbers: true,
});

http://codepen.io/anon/pen/yavrRk?editors=0010

编辑：

其他命令（例如 findNext ）将在应用查询后正常工作，但当然这也将取决于实例。如果您需要在所有实例中实现 findNext ，它会变得更复杂，您需要管理不同的事情，例如当前关注的实例，并覆盖某些行为，例如 findNext 循环和像这样的东西。它可以完成，但根据您需要的精度水平，它可能非常复杂。像这样的东西起作用，它不是很优雅，但展示了它是如何完成的：

CodeMirror.defineExtension('findNext', function(query) {
  function SearchState() {
    this.posFrom = this.posTo = this.lastQuery = this.query = null;
    this.overlay = null;
  }

  function getSearchState(cm) {
    return cm.state.search || (cm.state.search = new SearchState());
  }

  // You tweak findNext a bit so it doesn't loop and so that it returns
  // false when at the last occurence. You could make findPrevious as well
  var state = getSearchState(this);
  var cursor = this.getSearchCursor(state.query, state.posTo, state.query.toLowerCase());
  if (!cursor.find(false)) {
    state.posTo = CodeMirror.Pos(0, 0);
    this.setSelection(CodeMirror.Pos(0, 0));
    return false;

  } else {
    this.setSelection(cursor.from(), cursor.to());
    this.scrollIntoView({
      from: cursor.from(),
      to: cursor.to()
    }, 20);
    state.posFrom = cursor.from();
    state.posTo = cursor.to();
    return true;
  }
});

// You make a find next button that will handle all instances
const findNextBtn = document.createElement('button');
body.appendChild(findNextBtn);
findNextBtn.textContent = 'Find next';
findNextBtn.addEventListener('click', function(e) {
    // Here you need to keep track of where you want to start the search
    // and iterating through all instances. 
    var curFocusIndex = -1;
    var codeMirrorInstances = Array.prototype.slice.call(document.getElementsByClassName('CodeMirror'));
    var focusedIndex = codeMirrorInstances.indexOf(lastFocused.getWrapperElement());

    // with the new return in findNext you can control when you go to
    // next instance
    var findInCurCm = lastFocused.findNext();
    while (!findInCurCm && curFocusIndex !== focusedIndex) {
      curFocusIndex = codeMirrorInstances.indexOf(lastFocused.getWrapperElement()) + 1;
      curFocusIndex = curFocusIndex === codeMirrorInstances.length ? 0 : curFocusIndex;
      codeMirrorInstances[curFocusIndex].CodeMirror.focus();
      lastFocused = codeMirrorInstances[curFocusIndex].CodeMirror;    
      var findInCurCm = lastFocused.findNext();    
    }
  });

http://codepen.io/anon/pen/ORvJpK?editors=0010

如何在多个codemirror实例中进行搜索？

1 个答案: