drop experimental prewrap mode

- pasting in prewrap mode had been broken for a while and nobody noticed
- needs changes to export code and cloze handling code to deal with the
newlines
- newline rewriting in filterNode() is likely fragile
- may revisit post 2.1

anki/cards.py

@@ -135,10 +135,6 @@ lapses=?, left=?, odue=?, odid=?, did=? where id = ?""",
             else:
                 args = tuple()
             self._qa = self.col._renderQA(data, *args)
-            if m.get("prewrap", False):
-                wsdiv = "<div style='white-space:pre-wrap;'>{}</div>"
-                self._qa['q'] = wsdiv.format(self._qa['q'])
-                self._qa['a'] = wsdiv.format(self._qa['a'])
         return self._qa
 
     def note(self, reload=False):

aqt/editor.py

@@ -297,14 +297,11 @@ class Editor:
                 self.web.setFocus()
             runHook("loadNote", self)
 
-        self.web.evalWithCallback("setFields(%s, %s); setFonts(%s); focusField(%s)" % (
-            json.dumps(data), json.dumps(self.prewrapMode()),
+        self.web.evalWithCallback("setFields(%s); setFonts(%s); focusField(%s)" % (
+            json.dumps(data),
             json.dumps(self.fonts()), json.dumps(focusTo)),
                                   oncallback)
 
-    def prewrapMode(self):
-        return self.note.model().get('prewrap', False)
-
     def fonts(self):
         return [(f['font'], f['size'], f['rtl'])
                 for f in self.note.model()['flds']]
@@ -616,10 +613,9 @@ to a cloze type first, via Edit>Change Note Type."""))
             for node in doc(tag):
                 node.decompose()
 
-        if not self.prewrapMode():
-          # convert p tags to divs
-          for node in doc("p"):
-              node.name = "div"
+        # convert p tags to divs
+        for node in doc("p"):
+            node.name = "div"
 
         for tag in doc("img"):
             try:

aqt/models.py

@@ -110,7 +110,6 @@ class Models(QDialog):
         frm.latexsvg.setChecked(self.model.get("latexsvg", False))
         frm.latexHeader.setText(self.model['latexPre'])
         frm.latexFooter.setText(self.model['latexPost'])
-        frm.newStyleWhitespace.setChecked(self.model.get("prewrap", False))
         d.setWindowTitle(_("Options for %s") % self.model['name'])
         frm.buttonBox.helpRequested.connect(lambda: openHelp("latex"))
         restoreGeom(d, "modelopts")
@@ -119,7 +118,6 @@ class Models(QDialog):
         self.model['latexsvg'] = frm.latexsvg.isChecked()
         self.model['latexPre'] = str(frm.latexHeader.toPlainText())
         self.model['latexPost'] = str(frm.latexFooter.toPlainText())
-        self.model['prewrap'] = frm.newStyleWhitespace.isChecked()
 
     def saveModel(self):
         self.mm.save(self.model)

designer/modelopts.ui

@@ -64,33 +64,6 @@
        </item>
       </layout>
      </widget>
-     <widget class="QWidget" name="tab_2">
-      <attribute name="title">
-       <string>General</string>
-      </attribute>
-      <layout class="QVBoxLayout" name="verticalLayout_3">
-       <item>
-        <widget class="QCheckBox" name="newStyleWhitespace">
-         <property name="text">
-          <string>New style whitespace handling (EXPERIMENTAL)</string>
-         </property>
-        </widget>
-       </item>
-       <item>
-        <spacer name="verticalSpacer">
-         <property name="orientation">
-          <enum>Qt::Vertical</enum>
-         </property>
-         <property name="sizeHint" stdset="0">
-          <size>
-           <width>20</width>
-           <height>40</height>
-          </size>
-         </property>
-        </spacer>
-       </item>
-      </layout>
-     </widget>
     </widget>
    </item>
    <item>

web/editor.css

@@ -64,10 +64,6 @@ body {
     border-bottom: 3px solid #000;
 }
 
-.prewrap {
-    white-space: pre-wrap;
-}
-
 #fields {
     margin-top: 35px;
 }

web/editor.js

@@ -1,7 +1,6 @@
 var currentField = null;
 var changeTimer = null;
 var dropTarget = null;
-var prewrapMode = false;
 
 String.prototype.format = function () {
     var args = arguments;
@@ -27,12 +26,6 @@ function onKey() {
         currentField.blur();
         return;
     }
-    // catch enter key in prewrap mode
-    if (window.event.which === 13 && prewrapMode) {
-        window.event.preventDefault();
-        insertNewline();
-        return;
-    }
     // shift+tab goes to previous field
     if (navigator.platform === "MacIntel" &&
         window.event.which === 9 && window.event.shiftKey) {
@@ -264,7 +257,7 @@ function onCutOrCopy() {
     return true;
 }
 
-function setFields(fields, prewrap) {
+function setFields(fields) {
     var txt = "";
     for (var i = 0; i < fields.length; i++) {
         var n = fields[i][0];
@@ -282,10 +275,6 @@ function setFields(fields, prewrap) {
     }
     $("#fields").html("<table cellpadding=0 width=100%>" + txt + "</table>");
     maybeDisableButtons();
-    prewrapMode = prewrap;
-    if (prewrap) {
-        $(".field").addClass("prewrap");
-    }
 }
 
 function setBackgrounds(cols) {
@@ -345,29 +334,6 @@ allowedTags["TD"] = {"attrs": ["COLSPAN", "ROWSPAN"]};
 allowedTags["TH"] = {"attrs": ["COLSPAN", "ROWSPAN"]};
 allowedTags["IMG"] = {"attrs": ["SRC"]};
 
-var blockRegex = /^(address|blockquote|br|center|div|dl|h[1-6]|hr|ol|p|pre|table|ul|dd|dt|li|tbody|td|tfoot|th|thead|tr)$/i;
-function isBlockLevel(n) {
-    return blockRegex.test(n.nodeName);
-}
-
-function isInlineElement(n) {
-    return n && !isBlockLevel(n);
-}
-
-function convertDivToNewline(node, isParagraph) {
-    var html = node.innerHTML;
-    if (isInlineElement(node.previousSibling) && html) {
-        html = "\n" + html;
-    }
-    if (isInlineElement(node.nextSibling)) {
-        html += "\n";
-    }
-    if (isParagraph) {
-        html += "\n";
-    }
-    node.outerHTML = html;
-}
-
 // filtering from another field
 var filterInternalNode = function (node) {
     if (node.tagName === "SPAN") {
@@ -385,15 +351,6 @@ var filterInternalNode = function (node) {
 var filterNode = function (node) {
     // text node?
     if (node.nodeType === 3) {
-        if (prewrapMode) {
-            // collapse standard whitespace
-            var val = node.nodeValue.replace(/^[ \r\n\t]+$/g, " ");
-
-            // non-breaking spaces can be represented as normal spaces
-            val = val.replace(/&nbsp;|\u00a0/g, " ");
-
-            node.nodeValue = val;
-        }
         return;
     }
 
@@ -420,12 +377,6 @@ var filterNode = function (node) {
         } else {
             node.outerHTML = node.innerHTML;
         }
-    } else if (prewrapMode && node.tagName === "BR") {
-        node.outerHTML = "\n";
-    } else if (prewrapMode && node.tagName === "DIV") {
-        convertBlockToNewline(node, false);
-    } else if (prewrapMode && node.tagName === "P") {
-        convertBlockToNewline(node, true);
     } else {
         // allowed, filter out attributes
         var toRemove = [];