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authorWu Cheng-Han2015-05-04 15:53:29 +0800
committerWu Cheng-Han2015-05-04 15:53:29 +0800
commit4b0ca55eb79e963523eb6c8197825e9e8ae904e2 (patch)
tree574f3923af77b37b41dbf1b00bcd7827ef724a28 /public/vendor/codemirror/addon/display/placeholder.js
parent61eb11d23c65c9e5c493c67d055f785cbec139e2 (diff)
First commit, version 0.2.7
Diffstat (limited to 'public/vendor/codemirror/addon/display/placeholder.js')
-rwxr-xr-xpublic/vendor/codemirror/addon/display/placeholder.js58
1 files changed, 58 insertions, 0 deletions
diff --git a/public/vendor/codemirror/addon/display/placeholder.js b/public/vendor/codemirror/addon/display/placeholder.js
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+++ b/public/vendor/codemirror/addon/display/placeholder.js
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+// CodeMirror, copyright (c) by Marijn Haverbeke and others
+// Distributed under an MIT license: http://codemirror.net/LICENSE
+
+(function(mod) {
+ if (typeof exports == "object" && typeof module == "object") // CommonJS
+ mod(require("../../lib/codemirror"));
+ else if (typeof define == "function" && define.amd) // AMD
+ define(["../../lib/codemirror"], mod);
+ else // Plain browser env
+ mod(CodeMirror);
+})(function(CodeMirror) {
+ CodeMirror.defineOption("placeholder", "", function(cm, val, old) {
+ var prev = old && old != CodeMirror.Init;
+ if (val && !prev) {
+ cm.on("blur", onBlur);
+ cm.on("change", onChange);
+ onChange(cm);
+ } else if (!val && prev) {
+ cm.off("blur", onBlur);
+ cm.off("change", onChange);
+ clearPlaceholder(cm);
+ var wrapper = cm.getWrapperElement();
+ wrapper.className = wrapper.className.replace(" CodeMirror-empty", "");
+ }
+
+ if (val && !cm.hasFocus()) onBlur(cm);
+ });
+
+ function clearPlaceholder(cm) {
+ if (cm.state.placeholder) {
+ cm.state.placeholder.parentNode.removeChild(cm.state.placeholder);
+ cm.state.placeholder = null;
+ }
+ }
+ function setPlaceholder(cm) {
+ clearPlaceholder(cm);
+ var elt = cm.state.placeholder = document.createElement("pre");
+ elt.style.cssText = "height: 0; overflow: visible";
+ elt.className = "CodeMirror-placeholder";
+ elt.appendChild(document.createTextNode(cm.getOption("placeholder")));
+ cm.display.lineSpace.insertBefore(elt, cm.display.lineSpace.firstChild);
+ }
+
+ function onBlur(cm) {
+ if (isEmpty(cm)) setPlaceholder(cm);
+ }
+ function onChange(cm) {
+ var wrapper = cm.getWrapperElement(), empty = isEmpty(cm);
+ wrapper.className = wrapper.className.replace(" CodeMirror-empty", "") + (empty ? " CodeMirror-empty" : "");
+
+ if (empty) setPlaceholder(cm);
+ else clearPlaceholder(cm);
+ }
+
+ function isEmpty(cm) {
+ return (cm.lineCount() === 1) && (cm.getLine(0) === "");
+ }
+});