如何搜索多個codemirror實例？

Question

比方說，我有以下簡單的頁面有兩個CodeMirror實例：

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, 
}) 

而且我已經包括

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

每CodeMirror當關注編輯器時（通過ctrl/cmd-f觸發），實例現在擁有自己的搜索處理程序。我怎麼能實現跨多個CodeMirror實例工作的搜索/替換？

至少有一種方法可以在每個編輯器上執行find：editor.execCommand。我沒有辦法通過它，或查詢有什麼結果可用。

CodePen with example code and imports

GitHub issue for project wanting to use this, nteract。

在CodeMirror issue Marijn說「你必須自己編碼。」這是公平的 - 我不確定如何解決這個問題。

Answer 1

的找到和更換命令鏈接到對話框插件和似乎沒有要通過實例來訪問它們的方式，至少不會與未通過通過查詢對話。

但是，您可以恢復search.js中的大部分內容，並將其添加爲可以傳遞查詢的擴展。但是，您需要設置一個全局對話框或一種方法來獲取不依賴實例的查詢，並在每個實例上運行它。這樣的東西應該工作，這只是用於搜索，但將應便於還有：

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

編輯：

其他命令，例如FindNext中將正常工作，一旦查詢被應用，但當然這也將與實例有關。如果您需要在所有實例中實現findNext，則它變得更加複雜，您需要管理不同的事物，例如當前關注的實例，並且重寫某些行爲，如循環和諸如此類的某些行爲。它可以完成，但取決於您需要的精度級別，它可能非常複雜。像這樣的作品，它不是很優雅，但顯示它如何做：

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