indent.min.js

codeInput.plugins.Indent=class extends codeInput.Plugin{bracketPairs={};indentation="\t";indentationNumChars=1;tabIndentationEnabled=!0;escTabToChangeFocus=!0;escJustPressed=!1;constructor(a=!1,b=4,c={"(":")","[":"]","{":"}"},d=!0){if(super([]),this.bracketPairs=c,a){this.indentation="";for(let a=0;a<b;a++)this.indentation+=" ";this.indentationNumChars=b}this.escTabToChangeFocus=!0}disableTabIndentation(){this.tabIndentationEnabled=!1}enableTabIndentation(){this.tabIndentationEnabled=!0}afterElementsAdded(a){let b=a.textareaElement;b.addEventListener("focus",()=>{this.escTabToChangeFocus&&a.setKeyboardNavInstructions("Tab and Shift-Tab currently for indentation. Press Esc to enable keyboard navigation.",!0)}),b.addEventListener("keydown",b=>{this.checkTab(a,b),this.checkEnter(a,b),this.checkBackspace(a,b)}),b.addEventListener("beforeinput",b=>{this.checkCloseBracket(a,b)});let c=document.createElement("pre");c.setAttribute("aria-hidden","true");let d=document.createElement("span");if(a.template.preElementStyled)c.appendChild(d),c.classList.add("code-input_autocomplete_test-indentation-width"),a.appendChild(c);else{let b=document.createElement("code");b.appendChild(d),b.classList.add("code-input_autocomplete_test-indentation-width"),c.appendChild(b),a.appendChild(c)}d.innerHTML=a.escapeHtml(this.indentation);let e=d.offsetWidth;a.removeChild(c),a.pluginData.indent={indentationWidthPx:e}}checkTab(a,b){var c=Math.max;if(this.tabIndentationEnabled){if(this.escTabToChangeFocus){if("Escape"==b.key)return this.escJustPressed=!0,void a.setKeyboardNavInstructions("Tab and Shift-Tab currently for keyboard navigation. Type to return to indentation.",!1);if("Tab"!=b.key)return"Shift"==b.key?void 0:(a.setKeyboardNavInstructions("Tab and Shift-Tab currently for indentation. Press Esc to enable keyboard navigation.",!1),void(this.escJustPressed=!1));if(!this.enableTabIndentation||this.escJustPressed)return a.setKeyboardNavInstructions("",!1),void(this.escJustPressed=!1)}else if("Tab"!=b.key)return;let d=a.textareaElement;if(b.preventDefault(),!b.shiftKey&&d.selectionStart==d.selectionEnd)document.execCommand("insertText",!1,this.indentation);else{let e=d.value.split("\n"),f=0,g=d.selectionStart,h=d.selectionEnd;for(let a=0;a<e.length;a++)(g<=f+e[a].length&&h>=f+1||g==h&&g<=f+e[a].length+1&&h>=f)&&(b.shiftKey?e[a].substring(0,this.indentationNumChars)==this.indentation&&(d.selectionStart=f,d.selectionEnd=f+this.indentationNumChars,document.execCommand("delete",!1,""),g>f&&(g=c(g-this.indentationNumChars,f)),h-=this.indentationNumChars,f-=this.indentationNumChars):(d.selectionStart=f,d.selectionEnd=f,document.execCommand("insertText",!1,this.indentation),g>f&&(g+=this.indentationNumChars),h+=this.indentationNumChars,f+=this.indentationNumChars)),f+=e[a].length+1;d.selectionStart=g,d.selectionEnd=h,b.shiftKey?a.scrollBy(-a.pluginData.indent.indentationWidthPx,0):a.scrollBy(a.pluginData.indent.indentationWidthPx,0)}a.value=d.value}}checkEnter(a,b){if("Enter"!=b.key)return;b.preventDefault();let c=a.textareaElement,d=c.value.split("\n"),e=0,f=d.length-1,g="",h=0;for(let g=0;g<d.length;g++)if(e+=d[g].length+1,c.selectionEnd<=e){f=g;break}let j=d[f].length-(e-c.selectionEnd)+1;for(let c=0;c<j&&d[f].substring(c,c+this.indentationNumChars)==this.indentation;c+=this.indentationNumChars)h++;let k="";j!=d[f].length&&(k=d[f].substring(j),d[f]=d[f].substring(0,j));let l=!1,m="";if(null!=this.bracketPairs)for(let a in this.bracketPairs)if(d[f][d[f].length-1]==a){let b=this.bracketPairs[a];if(0<k.length&&k[0]==b){l=!0;for(let a=0;a<h+1;a++)m+=this.indentation}else h++;break}else{let b=this.bracketPairs[a];if(0<k.length&&k[0]==b){h--;break}}for(let c=0;c<h;c++)g+=this.indentation;let n=c.selectionStart;l&&(document.execCommand("insertText",!1,"\n"+m),h+=1),document.execCommand("insertText",!1,"\n"+g),c.selectionStart=n+h*this.indentationNumChars+1,c.selectionEnd=c.selectionStart;let o=+getComputedStyle(c).paddingTop.replace("px",""),p=+getComputedStyle(c).lineHeight.replace("px",""),q=+getComputedStyle(a).height.replace("px","");f*p+2*p+o>=c.scrollTop+q&&a.scrollBy(0,+getComputedStyle(c).lineHeight.replace("px","")),a.value=c.value}checkBackspace(a,b){if("Backspace"==b.key&&1!=this.indentationNumChars){let c=a.textareaElement;c.selectionStart==c.selectionEnd&&a.value.substring(c.selectionStart-this.indentationNumChars,c.selectionStart)==this.indentation&&(c.selectionStart-=this.indentationNumChars,b.preventDefault(),document.execCommand("delete",!1,""))}}checkCloseBracket(a,b){if(a.textareaElement.selectionStart==a.textareaElement.selectionEnd)for(let c in this.bracketPairs){let d=this.bracketPairs[c];b.data==d&&a.value.substring(a.textareaElement.selectionStart-this.indentationNumChars,a.textareaElement.selectionStart)==this.indentation&&(a.textareaElement.selectionStart-=this.indentationNumChars,document.execCommand("delete",!1,""))}}};