1 files changed, 83 insertions, 0 deletions
diff --git a/pastepy/static/edit.js b/pastepy/static/edit.js
new file mode 100644
index 0000000..8e754d8
--- /dev/null
+++ b/pastepy/static/edit.js
@@ -0,0 +1,83 @@
+function tab_add(t, ti, ss, se) {
+	t.value = t.value.substr(0, ti) + "\t" + t.value.substr(ti);
+	t.selectionStart = ss + 1;
+	t.selectionEnd = se + 1;
+}
+
+function tab_remove(t, ti, ss, se) {
+	t.value = t.value.substr(0, ti-1) + t.value.substr(ti);
+	t.selectionStart = ss - 1;
+	t.selectionEnd = se - 1;
+}
+
+function textarea_handle_tab(t, e) {
+	if(navigator.userAgent.match("Gecko")) {
+		keyCode = e.which;
+	} else {
+		keyCode = e.keyCode;
+	}
+	if(keyCode != 9)
+		return;
+	e.preventDefault();
+	var ss = t.selectionStart;
+	var se = t.selectionEnd;
+	if(ss == se) {
+		if(e.shiftKey) {
+			if(t.value[ss-1] == "\t") {
+				tab_remove(t, ss, ss, se);
+			}
+		} else {
+			tab_add(t, ss, ss, se);
+		}
+	} else {
+		var s;
+		if(ss < se)
+			s = t.value.substr(ss, se - ss);
+		else
+			s = t.value.substr(se, ss - se);
+		if(s.indexOf("\n") > -1) {
+			var nl = s.lastIndexOf("\n");
+			if(e.shiftKey) {
+				while(nl > -1) {
+					if(s[nl+1] == "\t") {
+						tab_remove(t, ss + nl + 2, ss, se);
+						se--;
+					}
+					nl = s.lastIndexOf("\n", nl - 2);
+				}
+				if(t.value[(ss < se ? ss : se)-1] == "\n" && e.shiftKey)
+					tab_remove(t, ss+1, ss, se);
+				if((ss == 0 || se == 0) && t.value[0] == "\t")
+					tab_remove(t, 1, ss, se);
+			} else {
+				while(nl > -1) {
+					tab_add(t, ss + nl + 1, ss, se);
+					se++;
+					if(nl == 0)
+						break;
+					nl = s.lastIndexOf("\n", nl - 2);
+				}
+				if(ss == 0 || se == 0 || t.value[(ss < se ? ss : se)-1] == "\n")
+					tab_add(t, ss, ss-1, se);
+			}
+
+		} else {
+			var nl = t.value.lastIndexOf("\n", (ss < se ? se : ss) - 1) + 1;
+			if(e.shiftKey) {
+				if(t.value[nl] == "\t") {
+					tab_remove(t, nl + 1, ss, se);
+				}
+			} else {
+				tab_add(t, nl, ss, se);
+			}
+		}
+	}
+	setTimeout("document.getElementById('" + t.id + "').focus();", 0);
+}
+
+window.onload = function() {
+	text = document.getElementById("text");
+	text.onkeydown = function(event) {
+		return textarea_handle_tab(text, event);
+	}
+}