move a few things away in to-be-integrated/

[myslice.git] / to-be-integrated / third-party / codemirror-3.15 / addon / search / searchcursor.js

diff --git a/to-be-integrated/third-party/codemirror-3.15/addon/search/searchcursor.js b/to-be-integrated/third-party/codemirror-3.15/addon/search/searchcursor.js
new file mode 100644 (file)
index 0000000..3da3f04
--- /dev/null
+++ b/to-be-integrated/third-party/codemirror-3.15/addon/search/searchcursor.js
@@ -0,0 +1,143 @@
+(function(){
+  var Pos = CodeMirror.Pos;
+
+  function SearchCursor(doc, query, pos, caseFold) {
+    this.atOccurrence = false; this.doc = doc;
+    if (caseFold == null && typeof query == "string") caseFold = false;
+
+    pos = pos ? doc.clipPos(pos) : Pos(0, 0);
+    this.pos = {from: pos, to: pos};
+
+    // The matches method is filled in based on the type of query.
+    // It takes a position and a direction, and returns an object
+    // describing the next occurrence of the query, or null if no
+    // more matches were found.
+    if (typeof query != "string") { // Regexp match
+      if (!query.global) query = new RegExp(query.source, query.ignoreCase ? "ig" : "g");
+      this.matches = function(reverse, pos) {
+        if (reverse) {
+          query.lastIndex = 0;
+          var line = doc.getLine(pos.line).slice(0, pos.ch), cutOff = 0, match, start;
+          for (;;) {
+            query.lastIndex = cutOff;
+            var newMatch = query.exec(line);
+            if (!newMatch) break;
+            match = newMatch;
+            start = match.index;
+            cutOff = match.index + (match[0].length || 1);
+            if (cutOff == line.length) break;
+          }
+          var matchLen = (match && match[0].length) || 0;
+          if (!matchLen) {
+            if (start == 0 && line.length == 0) {match = undefined;}
+            else if (start != doc.getLine(pos.line).length) {
+              matchLen++;
+            }
+          }
+        } else {
+          query.lastIndex = pos.ch;
+          var line = doc.getLine(pos.line), match = query.exec(line);
+          var matchLen = (match && match[0].length) || 0;
+          var start = match && match.index;
+          if (start + matchLen != line.length && !matchLen) matchLen = 1;
+        }
+        if (match && matchLen)
+          return {from: Pos(pos.line, start),
+                  to: Pos(pos.line, start + matchLen),
+                  match: match};
+      };
+    } else { // String query
+      if (caseFold) query = query.toLowerCase();
+      var fold = caseFold ? function(str){return str.toLowerCase();} : function(str){return str;};
+      var target = query.split("\n");
+      // Different methods for single-line and multi-line queries
+      if (target.length == 1) {
+        if (!query.length) {
+          // Empty string would match anything and never progress, so
+          // we define it to match nothing instead.
+          this.matches = function() {};
+        } else {
+          this.matches = function(reverse, pos) {
+            var line = fold(doc.getLine(pos.line)), len = query.length, match;
+            if (reverse ? (pos.ch >= len && (match = line.lastIndexOf(query, pos.ch - len)) != -1)
+                        : (match = line.indexOf(query, pos.ch)) != -1)
+              return {from: Pos(pos.line, match),
+                      to: Pos(pos.line, match + len)};
+          };
+        }
+      } else {
+        this.matches = function(reverse, pos) {
+          var ln = pos.line, idx = (reverse ? target.length - 1 : 0), match = target[idx], line = fold(doc.getLine(ln));
+          var offsetA = (reverse ? line.indexOf(match) + match.length : line.lastIndexOf(match));
+          if (reverse ? offsetA >= pos.ch || offsetA != match.length
+              : offsetA <= pos.ch || offsetA != line.length - match.length)
+            return;
+          for (;;) {
+            if (reverse ? !ln : ln == doc.lineCount() - 1) return;
+            line = fold(doc.getLine(ln += reverse ? -1 : 1));
+            match = target[reverse ? --idx : ++idx];
+            if (idx > 0 && idx < target.length - 1) {
+              if (line != match) return;
+              else continue;
+            }
+            var offsetB = (reverse ? line.lastIndexOf(match) : line.indexOf(match) + match.length);
+            if (reverse ? offsetB != line.length - match.length : offsetB != match.length)
+              return;
+            var start = Pos(pos.line, offsetA), end = Pos(ln, offsetB);
+            return {from: reverse ? end : start, to: reverse ? start : end};
+          }
+        };
+      }
+    }
+  }
+
+  SearchCursor.prototype = {
+    findNext: function() {return this.find(false);},
+    findPrevious: function() {return this.find(true);},
+
+    find: function(reverse) {
+      var self = this, pos = this.doc.clipPos(reverse ? this.pos.from : this.pos.to);
+      function savePosAndFail(line) {
+        var pos = Pos(line, 0);
+        self.pos = {from: pos, to: pos};
+        self.atOccurrence = false;
+        return false;
+      }
+
+      for (;;) {
+        if (this.pos = this.matches(reverse, pos)) {
+          if (!this.pos.from || !this.pos.to) { console.log(this.matches, this.pos); }
+          this.atOccurrence = true;
+          return this.pos.match || true;
+        }
+        if (reverse) {
+          if (!pos.line) return savePosAndFail(0);
+          pos = Pos(pos.line-1, this.doc.getLine(pos.line-1).length);
+        }
+        else {
+          var maxLine = this.doc.lineCount();
+          if (pos.line == maxLine - 1) return savePosAndFail(maxLine);
+          pos = Pos(pos.line + 1, 0);
+        }
+      }
+    },
+
+    from: function() {if (this.atOccurrence) return this.pos.from;},
+    to: function() {if (this.atOccurrence) return this.pos.to;},
+
+    replace: function(newText) {
+      if (!this.atOccurrence) return;
+      var lines = CodeMirror.splitLines(newText);
+      this.doc.replaceRange(lines, this.pos.from, this.pos.to);
+      this.pos.to = Pos(this.pos.from.line + lines.length - 1,
+                        lines[lines.length - 1].length + (lines.length == 1 ? this.pos.from.ch : 0));
+    }
+  };
+
+  CodeMirror.defineExtension("getSearchCursor", function(query, pos, caseFold) {
+    return new SearchCursor(this.doc, query, pos, caseFold);
+  });
+  CodeMirror.defineDocExtension("getSearchCursor", function(query, pos, caseFold) {
+    return new SearchCursor(this, query, pos, caseFold);
+  });
+})();