如何仅将 *selected* 文本更改为大写，而不是选择所在的整个段落

Question

在 Google 文档中，此函数将所选文本更改为黑色

function selectedFontColorBlack() {
//   DocumentApp.getUi().alert('selectedFontColorBlack');
   var sel = DocumentApp.getActiveDocument().getSelection();
   var elements = sel.getRangeElements();
   for (var i = 0; i < elements.length; i++) {
      var element = elements[i];

      // Only modify elements that can be edited as text; skip images and other non-text elements.
      if(element.getElement().editAsText) {
         var text = element.getElement().editAsText();

       // Bold the selected part of the element, or the full element if it's completely selected.
       if (element.isPartial()) {
         text.setForegroundColor(element.getStartOffset(), element.getEndOffsetInclusive(), "#000000");
       } else {
         text.setForegroundColor("#000000");
       }
     }
   }
}

此函数将光标（或选择）所在的整个段落更改为大写：

function uppercaseSelected() {
//  DocumentApp.getUi().alert('uppercaseSelected');
   var sel = DocumentApp.getActiveDocument().getSelection();
   var elements = sel.getRangeElements();
   for (var i = 0; i < elements.length; i++) {
      var element = elements[i];

      // Only modify elements that can be edited as text; skip images and other non-text elements.
      if(element.getElement().editAsText) {
         var text = element.getElement().editAsText();
         text.setText(text.getText().toUpperCase());
       }
   }
}

我没有看到任何对应的setText 函数适用于选择的“偏移”，setForegroundColor(Integer,Integer,String) 也是如此。 （这两个函数都在 Text 类中。）

如何将实际选择的文本改为大写，而不是选择所在的整个段落？

谢谢。

Answer 1

尝试使用setAttributes(startOffset, endOffsetInclusive, attributes) 方法。查看the documentation [编辑：我的错，我不认为那会做。我会看起来更长一点]
@Mogsdad 所指的帖子中隐藏的宝石是：var selectedText = elementText.substring(startOffset,endOffset+1);。
关于如何使用它更详细一点：您可以在 DocumentApp.getActiveDocument().getSelection().getSelectedElements()[i].getElement().editAsText().getText() 等对象上使用字符串方法 substring 所以，本质上，抓取该子字符串，将其转换为大写，删除(selectedElement.getstartOffset,selectedElement.endOffsetInclusive) 范围内的文本并将粗体文本插入selectedElement.getstartOffset

多田！看看吧：

function uppercaseSelected() {
   // Try to get the current selection in the document. If this fails (e.g.,
   // because nothing is selected), show an alert and exit the function.
   var selection = DocumentApp.getActiveDocument().getSelection();
   if (!selection) {
      DocumentApp.getUi().alert('Cannot find a selection in the document.');
      return;
   }

   var selectedElements = selection.getSelectedElements();
   for (var i = 0; i < selectedElements.length; ++i) {
      var selectedElement = selectedElements[i];

      // Only modify elements that can be edited as text; skip images and other
      // non-text elements.
      var text = selectedElement.getElement().editAsText();

      // Change the background color of the selected part of the element, or the
      // full element if it's completely selected.
      if (selectedElement.isPartial()) {
        var bitoftext = text.getText().substring(selectedElement.getStartOffset(), selectedElement.getEndOffsetInclusive() + 1);
        text.deleteText(selectedElement.getStartOffset(), selectedElement.getEndOffsetInclusive());
        text.insertText(selectedElement.getStartOffset(), bitoftext.toUpperCase());
      }  else  {
        text.setText(text.getText().toUpperCase());
      }
   }
}

Answer 2

从Google App script Document App get selected lines or words? 的代码开始，大约一年前就完成了。如果对你有帮助，我很高兴。

“诀窍”是您需要删除原始文本并插入转换后的文本。

此脚本生成一个菜单，其中包含 UPPER、lower 和 Title Case 选项。由于删除/插入，处理多个段落需要特别注意。我把它留给你了！

function onOpen() {
  DocumentApp.getUi().createMenu('Change Case')
    .addItem("UPPER CASE", 'toUpperCase' )
    .addItem("lower case", 'toLowerCase' )
    .addItem("Title Case", 'toTitleCase' )
    .addToUi();
}

function toUpperCase() {
  _changeCase(_toUpperCase);
}

function toLowerCase() {
  _changeCase(_toLowerCase);
}

function toTitleCase() {
  _changeCase(_toTitleCase);
}

function _changeCase(newCase) {
  var doc = DocumentApp.getActiveDocument();
  var selection = doc.getSelection();
  var ui = DocumentApp.getUi();
  var report = "";  // Assume success

  if (!selection) {
    report = "Select text to be modified.";
  }
  else {
    var elements = selection.getSelectedElements();
    if (elements.length > 1) {
      report = "Select text in one paragraph only.";
    }
    else {
      var element = elements[0].getElement();
      var startOffset = elements[0].getStartOffset();      // -1 if whole element
      var endOffset = elements[0].getEndOffsetInclusive(); // -1 if whole element
      var elementText = element.asText().getText();       // All text from element
      // Is only part of the element selected?
      if (elements[0].isPartial())
        var selectedText = elementText.substring(startOffset,endOffset+1);
      else
        selectedText = elementText;

      // Google Doc UI "word selection" (double click)
      // selects trailing spaces - trim them
      selectedText = selectedText.trim();
      endOffset = startOffset + selectedText.length - 1;

      // Convert case of selected text.
      var convertedText = newCase(selectedText);
      element.deleteText(startOffset, endOffset);
      element.insertText(startOffset, convertedText);
    }
  }
  if (report !== '') ui.alert( report );
}

function _toUpperCase(str) {
  return str.toUpperCase();
}

function _toLowerCase(str) {
  return str.toLowerCase();
}

// https://stackoverflow.com/a/196991/1677912
function _toTitleCase(str)
{
    return str.replace(/\w\S*/g, function(txt){return txt.charAt(0).toUpperCase() + txt.substr(1).toLowerCase();});
}