by htsign
2013-04-23 [2013/04/23 02:26:37]
選択範囲、またはアクティブなテキストボックス・テキストエリアの文字数を表示する小窓を作成する。小窓はドラッグ可能。練習を兼ねて作った過去作なのでコードはぐちゃぐちゃです。
/*
* @title 文字数カウント
* @description 選択範囲、またはアクティブなテキストボックス・テキストエリアの文字数を表示する小窓を作成する。練習を兼ねて作った過去作なのでコードはぐちゃぐちゃです。
* @include http://*
* @license NYSL
*/
if (document.getElementById("strLenChkDiv")==null) var strLenChkWnd = "", strLenChkWndStyle = "";
(function (w, d) { // w=window, d=document
var str = "";
var TIMER = d.all ? 200 : 100; // IE系のみ更新間隔を延ばす
var divPadding = "8px";
// イベントリスナ追加
var addEvent = function(target, evt, func) {
if (w.addEventListener) {
return target.addEventListener(evt, func, false);
}
else if (w.attachEvent) {
if (target===w) target = d;
return target.attachEvent("on"+evt, func);
}
else return false;
};
try {
d.body.removeChild(d.getElementById("strLenChkDiv"));
return false;
}
catch (e) {}
// http://misttrap.s101.xrea.com/sample/bytelength_for_mbstring.htm
String.prototype.getByteLenUTF8 = function() {
for(var i = this.length, num, res = i * 2; i-- > 0;) {
if((num = this.charCodeAt(i)) > 0x7ff && (num < 0xd800 || num > 0xdfff)) {
res++;
} else if(num < 0x80) {
res--;
}
}
return res;
};
(function () {
var mouse = {};
mouse.X = 0;
mouse.Y = 0;
var draggable = false;
strLenChkWnd = d.createElement("div");
strLenChkWnd.id = "strLenChkDiv";
strLenChkWnd.setAttribute("style"
, "position: fixed !important;"
+ "z-index: 999999 !important;"
+ "left: 8px;"
+ "top: 8px;"
+ "width: 200px !important;"
+ "height: 100px !important;"
+ "border: 6px double silver !important;"
+ "border-radius: 6px !important;"
+ "background-color: white !important;"
+ "margin: 0 !important;"
+ "padding: 6px !important;"
+ "color: black !important;"
+ "font-size: 16px !important;"
+ "font-family: 'メイリオ', 'ヒラギノ角ゴ Pro W3', 'ＭＳ Ｐゴシック', sans-serif !important;"
+ "font-style: normal !important;"
+ "font-weight: normal !important;"
+ "text-align: left !important;"
+ "line-height: 24px !important;"
+ "cursor: move;"
+ "user-select: none;"
+ "float: none !important;"
+ "display: block !important;");
strLenChkWnd.onmousedown = function() { return false };
addEvent(strLenChkWnd, "mousedown", function(evt) {
evt = evt || window.event;
draggable = true;
mouse.X = evt.clientX;
mouse.Y = evt.clientY;
return false;
});
addEvent(window, "mouseup", function() {
draggable = false;
return false;
});
addEvent(strLenChkWnd, "mousemove", function(evt) {
var left, top;
evt = evt || window.event;
var s = (w.addEventListener ? this : strLenChkWnd).style; // IEだとthisがwindowを指すので
if (draggable) {
left = parseInt(s.left, 10);
top = parseInt(s.top , 10);
s.left = left + evt.clientX - mouse.X + "px";
s.top = top + evt.clientY - mouse.Y + "px";
}
mouse.X = evt.clientX;
mouse.Y = evt.clientY;
return false;
});
d.body.appendChild(strLenChkWnd);
})();
var getStr = function () {
var ret = "";
var selectStr
= w.getSelection ? w.getSelection().toString()
: d.getSelection ? d.getSelection()
: d.selection ? d.selection.createRange().text
: "";
if (!selectStr) {
var a = d.activeElement;
try {
if (a.selectionEnd - a.selectionStart)
return a.selectionEnd - a.selectionStart;
}
catch (e) {
if (a.tagName=="textarea" || a.tagName=="input")
return a.value || a.innerHTML || "";
else selectStr = "";
}
}
if (selectStr) ret = selectStr;
else {
var obj = d.activeElement;
if (obj) {
if (obj.tagName.toLowerCase() == "textarea") {
ret = obj.value;
if (!ret) ret = obj.innerHTML;
}
if (obj.tagName.toLowerCase() == "input"
&& ( !obj.type || obj.type.toLowerCase() == "text")) ret = obj.value;
}
}
return ret;
};
//
// ここがメイン
//******************************************************
function loop() {
str = getStr(window);
if (d.getElementById("strLenChkDiv")==null) {
clearInterval(iv);
return false;
}
writeText(str);
}
function writeText(str) {
var obj = strLenChkWnd;
if (str && typeof(str) != "number") {
var c = str.split("\n").length-1;
obj.innerHTML = "<p>文字列長 : "+str.length+" 文字</p><p>改行数 : "+c+" 個</p>";
}
else if (typeof(str) == "number")
obj.innerHTML = "<p>文字列長 : "+str+" 文字</p>";
else
obj.innerHTML = "<p>文字列長 : "+str.length+" 文字</p>";
if (getCharset().toUpperCase() == "UTF-8") {
var bytes = str.getByteLenUTF8();
obj.innerHTML += "<p>バイト数 : "+bytes+" bytes</p>";
}
var cn = obj.childNodes;
for (var i=0; i<cn.length; i++) {
if (cn[i].nodeType == 1) {
cn[i].setAttribute("style",
"margin: 0 !important;"
+ "padding: 4px 0 !important;"
+ "color: black !important;"
+ "font-size: 16px !important;"
+ "font-family: 'メイリオ', 'ヒラギノ角ゴ Pro W3', 'ＭＳ Ｐゴシック', sans-serif !important;"
+ "font-style: normal !important;"
+ "font-weight: normal !important;"
+ "text-align: left !important;"
+ "line-height: 24px !important;"
+ "z-index: inherit !important;");
}
}
}
function getCharset() {
if (d.characterSet)
return d.characterSet;
else if (d.charset)
return d.charset;
}
if (strLenChkWnd) {
var iv;
loop();
iv = setInterval(loop, TIMER);
}
})(window, document);