Kyl*_*ley 5 javascript codemirror
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,
})
而且我已经包括在内
codemirror/addon/search/searchcodemirror/addon/search/searchcursorcodemirror/addon/dialog/dialog现在,每个CodeMirror实例在关注编辑器时都有自己的搜索处理程序(通过ctrl/cmd -f触发).如何实现跨多个CodeMirror实例的搜索/替换？
有至少执行方式find上的每个编辑:editor.execCommand.我没有看到通过它的方法,或查询可用的结果.
在CodeMirror问题中, Marijn声明"你必须自己编写代码."这是公平的 - 我不确定如何处理这个问题.
查找和替换命令链接到对话框插件，似乎没有办法通过实例访问它们，至少不能使用不通过对话框传递的查询。
但是您可以恢复 search.js 中的大部分内容并将其添加为扩展，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不依赖于实例的查询的方法，并在每个实例上运行它。类似的东西应该可以工作，这仅用于搜索，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：
一旦应用查询，其他命令（例如findNext）将正常工作，但这当然也取决于实例。如果您需要在所有实例上实现findNext，它会变得更加复杂，您需要管理不同的事物（例如当前聚焦的实例），并覆盖某些行为（例如findNext循环等）。这是可以做到的，但根据您需要的精度水平，它可能会非常复杂。像这样的东西是有效的，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