我正在尝试设置一项功能来更新Google文档上的图片,就像Lucidchart Add-on在其“更新的插入图表”功能上所做的那样。为此,我现在正在做以下事情:
这很有效,但我有以下Lucidchart不会发生的问题:
有没有人知道更换/更新Google文档中引用图片的好策略,就像Lucidchart附加更新功能一样有效?
由于
答案 0 :(得分:5)
当移动范围时,NamedRanges确实会丢失,因此它们对您的方案不太好。但是没有其他方法可以识别元素(这是Google Docs的一个很好的错误)。
对于图像,您可以使用其LINK_URL来识别它,这似乎是Lucidchart使用的。它不会妨碍用户,所以它可能是一个很好的解决方案。
关于在插入图片时获取空行并丢失属性,我想(因为您还没有共享任何代码),您需要将图像直接插入文档正文而不是段落。然后会自动创建一个段落来包装图像,从而产生空行并丢失属性。
以下是一些代码示例:
function initialInsert() {
var data = Charts.newDataTable().addColumn(
Charts.ColumnType.STRING, 'Fruits').addColumn(
Charts.ColumnType.NUMBER, 'Amount').addRow(
['Apple',15]).addRow(
['Orange',6]).addRow(
['Banana',14]).build();
var chart = Charts.newPieChart().setDataTable(data).build();
var body = DocumentApp.getActiveDocument().getBody()
body.appendImage(chart).setLinkUrl('http://mychart');
//here we're inserting directly in the body, a wrapping paragraph element will be created for us
}
function updateImage() {
var data = Charts.newDataTable().addColumn(
Charts.ColumnType.STRING, 'Fruits').addColumn(
Charts.ColumnType.NUMBER, 'Amount').addRow(
['Apple',Math.floor(Math.random()*31)]).addRow( //random int between 0 and 30
['Orange',Math.floor(Math.random()*31)]).addRow(
['Banana',Math.floor(Math.random()*31)]).build();
var chart = Charts.newPieChart().setDataTable(data).build();
var img = getMyImg(DocumentApp.getActiveDocument().getBody(), 'http://mychart');
//let's insert on the current parent instead of the body
var parent = img.getParent(); //probably a paragraph, but does not really matter
parent.insertInlineImage(parent.getChildIndex(img)+1, chart).setLinkUrl('http://mychart');
img.removeFromParent();
}
function getMyImg(docBody, linkUrl) {
var imgs = docBody.getImages();
for( var i = 0; i < imgs.length; ++i )
if( imgs[i].getLinkUrl() === linkUrl )
return imgs[i];
return null;
}
关于link_url,您当然可以像Lucidchart那样做并链接回您的网站。所以它不仅仅为用户而破坏。
答案 1 :(得分:2)
看一下名为PlantUML Gizmo的加载项。
这里是插入图片功能的代码,如果已经选择了图片,则会处理替换图片:
function insertImage(imageDataUrl, imageUrl) {
/*
* For debugging cursor info
*/
// var cursor = DocumentApp.getActiveDocument().getCursor();
// Logger.log(cursor.getElement().getParent().getType());
// throw "cursor info: " + cursor.getElement().getType() + " offset = " + cursor.getOffset() + " surrounding text = '" + cursor.getSurroundingText().getText() + "' parent's type = " +
// cursor.getElement().getParent().getType();
/*
* end debug
*/
var doc = DocumentApp.getActiveDocument();
var selection = doc.getSelection();
var replaced = false;
if (selection) {
var elements = selection.getSelectedElements();
// delete the selected image (to be replaced)
if (elements.length == 1 &&
elements[0].getElement().getType() ==
DocumentApp.ElementType.INLINE_IMAGE) {
var parentElement = elements[0].getElement().getParent(); // so we can re-insert cursor
elements[0].getElement().removeFromParent();
replaced = true;
// move cursor to just before deleted image
doc.setCursor(DocumentApp.getActiveDocument().newPosition(parentElement, 0));
} else {
throw "Please select only one image (image replacement) or nothing (image insertion)"
}
}
var cursor = doc.getCursor();
var blob;
if (imageDataUrl != "") {
blob = getBlobFromBase64(imageDataUrl);
} else {
blob = getBlobViaFetch(imageUrl);
}
var image = cursor.insertInlineImage(blob);
image.setLinkUrl(imageUrl);
// move the cursor to after the image
var position = doc.newPosition(cursor.getElement(), cursor.getOffset()+1);
doc.setCursor(position);
if (cursor.getElement().getType() == DocumentApp.ElementType.PARAGRAPH) {
Logger.log("Resizing");
// resize if wider than current page
var currentParagraph = DocumentApp.getActiveDocument().getCursor().getElement().asParagraph();
var originalImageWidth = image.getWidth(); // pixels
var documentWidthPoints = DocumentApp.getActiveDocument().getBody().getPageWidth() - DocumentApp.getActiveDocument().getBody().getMarginLeft() - DocumentApp.getActiveDocument().getBody().getMarginRight();
var documentWidth = documentWidthPoints * 96 / 72; // convert to pixels (a guess)
var paragraphWidthPoints = documentWidthPoints - currentParagraph.getIndentStart() - currentParagraph.getIndentEnd();
var paragraphWidth = paragraphWidthPoints * 96 / 72; // convert to pixels (a guess)
if (originalImageWidth > paragraphWidth) {
image.setWidth(paragraphWidth);
// scale proportionally
image.setHeight(image.getHeight() * image.getWidth() / originalImageWidth);
}
}
}