我可以告诉iText如何剪辑文本以适应单元格 [英] Can I tell iText how to clip text to fit in a cell
问题描述
当我在PdfPCell上调用setFixedHeight（）并添加更多文本而不是给定高度时，iText似乎打印出适合的字符串的前缀。
When I call setFixedHeight() on a PdfPCell, and add more text than fits in the given height, iText seems to print the prefix of the string which fits.
我可以控制此裁剪算法吗？例如：
Can I control this clipping algorithm? For example:
-
打印字符串的后缀而不是前缀。
Print a suffix of the string rather than a prefix.
将字符串的子字符串标记为不删除。这是脚注参考。如果我添加Hello World [1]文本，则[1]是对脚注的引用，不应删除。可以删除字符串的其他字符，例如World。
Mark a substring of the string as not to be removed. This is with footnote references. If I add text saying "Hello World [1]", the [1] is a reference to a footnote and should not be removed. It's okay to remove the other characters of the string, like "World".
当字符串中有多个单词时，iText似乎消除了一个单词不适合，而我想部分打印。也就是说，如果字符串是Hello World，并且单元格只有Hello Wo ...的空间，我希望打印出来，而不仅仅是Hello，因为iText会打印出来。
When there are multiple words in the string, iText seems to eliminate a word that doesn't fit, while I would like it partially printed. That is, if the string is "Hello World", and the cell has room only for "Hello Wo...", I would like that to be printed, rather than just "Hello", as iText prints.
不是完整打印字符，而是只打印部分字符。想象一下，将文本打印到PNG并切掉PNG的顶部和/或底部以使其适合可用空间。例如，请注意顶部线和底线部分被剪切：
Rather than printing characters in their entirety, print only part of them. Imagine printing the text to a PNG and chopping off the top and/or bottom part of the PNG to fit it in the space available. For example, notice that the top line and the bottom line are partially clipped here:
这些都可能吗？ iText是否可以控制文本的剪切方式？谢谢。
Are any of these possible? Does iText give me any control over how text is clipped? Thanks.
这是参考iText 2.1.6。
This is with reference to iText 2.1.6.
推荐答案
<我已经写了一个概念证明， ClipCenterCellContent ，我们试着在那里填写文本D2是一个包含更多内容的单元格。在一个太小的单元格中。
I have written a proof of concept, ClipCenterCellContent, where we try to fit the text "D2 is a cell with more content than we can fit into the cell." in a cell that is too small.
就像你的另一个问题一样（ iText - - 如何获取文本的渲染尺寸？），我们使用单元格事件添加内容，但现在我们将其添加两次：一次在模拟模式下（以找出垂直需要多少空间）和一次for real（使用偏移量）。
Just like in your other question ( iText -- How do I get the rendered dimensions of text? ), we add the content using a cell event, but we now add it twice: once in simulation mode (to find out how much space is needed vertically) and once for real (using an offset).
这会在模拟模式中添加内容（我们使用单元格的宽度和任意高度）：
This adds the content in simulation mode (we use the width of the cell and an arbitrary height):
PdfContentByte canvas = canvases[PdfPTable.TEXTCANVAS];
ColumnText ct = new ColumnText(canvas);
ct.setSimpleColumn(new Rectangle(0, 0, position.getWidth(), -1000));
ct.addElement(content);
ct.go(true);
float spaceneeded = 0 - ct.getYLine();
System.out.println(String.format("The content requires %s pt whereas the height is %s pt.", spaceneeded, position.getHeight()));
我们现在知道所需的高度，我们可以使用偏移量添加实际内容：
We now know the needed height and we can add the content for real using an offset:
float offset = (position.getHeight() - spaceneeded) / 2;
System.out.println(String.format("The difference is %s pt; we'll need an offset of %s pt.", -2f * offset, offset));
PdfTemplate tmp = canvas.createTemplate(position.getWidth(), position.getHeight());
ct = new ColumnText(tmp);
ct.setSimpleColumn(0, offset, position.getWidth(), offset + spaceneeded);
ct.addElement(content);
ct.go();
canvas.addTemplate(tmp, position.getLeft(), position.getBottom());
在这种情况下，我使用了 PdfTemplate 剪辑内容。
In this case, I used a PdfTemplate to clip the content.
我也有其他问题的答案，但我现在没有时间回答。
I also have answers to your other questions, but I don't have the time to answer them right now.
这篇关于我可以告诉iText如何剪辑文本以适应单元格的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
