mirror of https://github.com/torappinfo/uweb.git
87 lines
2.6 KiB
JavaScript
87 lines
2.6 KiB
JavaScript
var textarea;
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onload=function(){
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textarea=document.getElementsByTagName('textarea')[0];
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}
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function getNewlinePos_back(text,pos){
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while(pos>=0 && text.charAt(pos)!='\n') pos--;
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return pos;
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}
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function getNewlinePos_forth(text,pos){
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let len = text.length;
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while(pos<len && text.charAt(pos)!='\n') pos++;
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return pos;
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}
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function deleteLine(ta){
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let text = ta.value;
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let lStart = getNewlinePos_back(text,ta.selectionStart-1);
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let lEnd = getNewlinePos_forth(text,ta.selectionEnd);
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ta.value = text.substring(0,lStart+1) + text.substring(lEnd+1);
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ta.selectionStart = ta.selectionEnd = lStart +1;
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ta.focus();
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}
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function moveUp(ta){
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let text = ta.value;
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let start = ta.selectionStart;
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let end = ta.selectionEnd;
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let lStart = getNewlinePos_back(text,start-1);
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let lEnd = getNewlinePos_forth(text,end);
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let prevS = getNewlinePos_back(text,lStart-1);
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ta.value = text.substring(0,prevS+1)+text.substring(lStart+1,lEnd+1)+
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text.substring(prevS+1,lStart+1) + text.substring(lEnd+1);
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ta.selectionStart = start - (lStart - prevS);
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ta.selectionEnd = end - (lStart - prevS);
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ta.focus();
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}
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function move2Top(ta){
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let text = ta.value;
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let start = ta.selectionStart;
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let end = ta.selectionEnd;
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let lStart = getNewlinePos_back(text,start-1);
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let lEnd = getNewlinePos_forth(text,end);
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ta.value = text.substring(lStart+1,lEnd+1)+text.substring(0,lStart+1)+
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text.substring(lEnd+1);
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ta.selectionStart = start - lStart-1;
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ta.selectionEnd = end - lStart-1;
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ta.focus();
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}
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function move2Bottom(ta){
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let text = ta.value;
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let start = ta.selectionStart;
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let end = ta.selectionEnd;
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let lStart = getNewlinePos_back(text,start-1);
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let lEnd = getNewlinePos_forth(text,end);
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ta.value = text.substring(0,lStart+1)+text.substring(lEnd+1)+
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text.substring(lStart+1,lEnd+1);
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ta.selectionStart = start + text.length - lEnd-1;
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ta.selectionEnd = end + text.length - lEnd-1;
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ta.focus();
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}
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function moveDown(ta){
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let text = ta.value;
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let start = ta.selectionStart;
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let end = ta.selectionEnd;
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let lStart = getNewlinePos_back(text,start-1);
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let lEnd = getNewlinePos_forth(text,end);
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let nextE = getNewlinePos_forth(text,lEnd+1);
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ta.value = text.substring(0,lStart+1) + text.substring(lEnd+1,nextE+1) +
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text.substring(lStart+1,lEnd+1)+text.substring(nextE+1);
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ta.selectionStart = start + (nextE - lEnd);
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ta.selectionEnd = end + (nextE - lEnd);
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ta.focus();
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}
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function save(fn){
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let u8=new TextEncoder().encode(textarea.value);let r='';for(let i=0;i<u8.byteLength;i++)r+=String.fromCharCode(u8[i]);location.href='i:0l'+fn+':'+btoa(r);
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}
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function onSave(){
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save(location.pathname);
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}
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