search.js uses `space` regexes now, improving nword match

1 files changed, 38 insertions, 0 deletions

diff --git a/space.js b/space.js
index 65b5355..c5a0927 100644
--- a/space.js
+++ b/space.js
@@ -138,6 +138,44 @@ function Space(){
     return loc;
   }
 
+  this.regex = function(strlines){
+    if (typeof strlines[0] !== 'string') throw ".regex needs arr of strings";
+    let lines = [];
+    for (let i = 0; i < strlines.length; i++) {
+        lines.push(new RegExp(strlines[i], 'g'));
+    }
+    let data = [];
+    for (let ln of this.data){
+      let newln = "";
+      for (c of ln){
+        if (c === '') newln += '\0';
+        else newln += c;
+      }
+      data.push(newln);
+    }
+    let loc;
+    data.forEach( (ln, ind) => {
+      if (loc || ((data.length - ind) < lines.length)) return;
+      let match;
+      while ( (match = lines[0].exec(ln)) !== null){
+        let xdisp = match.index;
+        let lnmatch = true;
+        for (let i=1; lines[i] !== undefined; i+= 1){
+          let imatch = lines[i].exec(data[ind+i].slice(xdisp));
+          if (!imatch || imatch.index !== 0){
+            lnmatch = false;
+            break;
+          }
+        }
+        if (lnmatch){
+          loc = [ind, xdisp];
+          break;
+        }
+      }
+    });
+    return (loc === undefined ? [] : loc);
+  }
+
   this.subsection = function(range){ // range is a coordinate pair
     if (range.length !== 2 || range[0].length !== 2) throw "not subsecting a coord pair";
     // Similarly excludes this.loc