Google Apps Script getWidth() for document table cell width returns null

问题

I'd like to insert image in the Google document by using Google Apps Script, and to spread it (the image) to the width of the page - margins or to insert it in the table cell and spread it to the width of the cell.

The code goes like this:

var image = DriveApp.getFileById(fileId).getBlob();
var insertPlace = body.findText(searchText).getElement();
insertPlace.asText().setText("");
var insertedImage = insertPlace.getParent().asParagraph().insertInlineImage(0, image);
var h = insertedImage.getHeight();
var w = insertedImage.getWidth();
insertedImage.setWidth(width).setHeight(width * h / w);

And where is the problem?

width!

How to find width of the table cell or body?

I have tried with

var width = insertPlace.getParent().asParagraph().asTableCell().getWidth();

but got null although cell is in the single column of the table, and table takes all the width of the page-margins.

Anyone got the idea about how to get width of the cell?

Also, how to get page width, margins etc...

UPDATE

I have discovered that the issue must be with the Google code about this. Actually, they have made differently handling with tables in slides compared to document:

https://developers.google.com/apps-script/reference/slides/table-cell https://developers.google.com/apps-script/reference/document/table-cell

In slides version there is, for example, getParentColumn(), which is not available for the document... any many similar discrepancies.

What are doing these guys at Google?!?!?

回答1:

This is not perfect but it seems to get me pretty close. May be you could work with it some more and get the rest of the way. I thought that the PAGE_WIDTH and PAGE_HEIGHT were in points but when I look at the number it seemed rather large so I used them as pixels instead. And it appears to work for me the image is centered in the page and goes from left margin to right margin. I didn't adjust the page height because my image looked ok but you might wish to do that.

function insertImage() {
  var doc=DocumentApp.getActiveDocument();
  var body=doc.getBody();
  var atts=body.getAttributes();
  for(var att in atts) {
    Logger.log(att + ':' + atts[att]);
  }
  var folderId="Folder ID";
  var files=DriveApp.getFolderById(folderId).getFiles();
  while(files.hasNext()) {
    var file=files.next();
    if(file.getName()=="Image File Name") {
      var image=file.getBlob().getAs('image/png');//may need to change content type
      var img=body.appendImage(image);
      var h=img.getHeight();
      var w=img.getWidth();
      var mr=atts['MARGIN_RIGHT'];
      var ml=atts['MARGIN_LEFT'];
      var sw=atts['PAGE_WIDTH'];
      var sh=atts['PAGE_HEIGHT'];
      img.setHeight(sw*h/w);
      img.setWidth((sh-mr-ml)*w/h);
    }
  }
}

来源：https://stackoverflow.com/questions/58675314/google-apps-script-getwidth-for-document-table-cell-width-returns-null

标签

google-apps-script

google-docs

grid-layout