tkinter 文本小部件作为 html

问题描述：

我已经构建了用于发送电子邮件的 tkinter 应用程序.电子邮件正文应该从文本小部件中获取带有格式/样式的文本.有什么方法可以做同样的事情.

I had built tkinter app for sending email. The body of email should get the text with formatting/style from the text widget. Is there any method for doing the same.

get 方法只给出文本，而不给出样式/格式.

get method is only given the text but not the style/formatting.

答

文本小部件有一个名为 dump 的方法，它可以序列化文本小部件中的所有内容.它返回一个元组列表.每个元组将采用 (key, value, index) 形式.key 将是以下之一:text、mark、tagon、tagoff、image 或 window.该值将取决于键.例如，对于 tagon 和 tagoff，值将是标签的名称.对于 text，它是文本.

The text widget has a method named dump which can serialize everything in the text widget. It returns a list of tuples. Each tuple will be of the form (key, value, index). key will be one of the following: text, mark, tagon, tagoff, image, or window. The value will be dependent on the key. For example, with tagon and tagoff the value will be the name of the tag. For text it's the text.

考虑一个带有标记b"(粗体)和h1"(标题)标记的文本小部件.它可能看起来像这样:

Consider a text widget with the tags "b" for bold and "h1" for the header. It might look something like this:

当您调用 dump 方法(例如:self.text.dump("1.0", "end"))时，您会得到如下内容:

When you call the dump method (eg: self.text.dump("1.0", "end")), you would get something like the following:

(
    ('mark', 'current', '1.0'),
    ('tagon', 'h1', '1.0'),
    ('text', 'Hello, world!', '1.0'),
    ('tagoff', 'h1', '1.13'),
    ('text', '\n', '1.13'),
    ('text', '\n', '2.0'),
    ('text', 'this is a test with some ', '3.0'),
    ('tagon', 'b', '3.25'),
    ('text', 'bold text', '3.25'),
    ('tagoff', 'b', '3.34'),
    ('text', '.', '3.34'),
    ('mark', 'insert', '3.35'),
    ('text', '\n', '3.35'),
)

转换程序只需要遍历该数据并处理每个键.如果您使用与 html 标签相对应的标签名称(例如:"b"、"h1" 等)，转换将变得相当简单.它可能看起来像这样:

A conversion program simply needs to loop over that data and process each key. If you use tag names that correspond to html tags (eg: "b", "h1", etc), the conversion becomes fairly simple. It might look something like this:

def convert(self):
    html = ""
    for (key, value, index) in self.text.dump("1.0", "end"):
        self.converted.insert("end", str((key, value, index)) + "\n")
        if key == "tagon":
            html += "<{}>".format(value)
        elif key == "tagoff":
            html += "</{}>".format(value)
        elif key == "text":
            html += value

对于示例窗口，上面会产生类似这样的结果:

The above would yield something like this for the example window:

<h1>Hello, world!</h1>
this is a test with some <b>bold text</b>.

您必须添加一些额外的代码来处理段落，因为 dump 方法只返回换行符而不是每个段落的标签，但除此之外，它是一个相当简单的算法.

You'll have to add some additional code to handle paragraphs since the dump method just returns newlines rather than tags for each paragraph, but otherwise it's a fairly straight-forward algorithm.

tkinter 文本小部件作为 html

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