{"id":1234,"date":"2023-09-22T08:48:38","date_gmt":"2023-09-22T06:48:38","guid":{"rendered":"http:\/\/oopm.org\/?page_id=1234"},"modified":"2024-06-20T21:47:18","modified_gmt":"2024-06-20T19:47:18","slug":"6-x-a-simple-text-formatter-system","status":"publish","type":"page","link":"https:\/\/oopm.org\/?page_id=1234","title":{"rendered":"10.3-old A simple text formatter system"},"content":{"rendered":"
\"image_pdf\"<\/a>\"image_print\"<\/a><\/div>\n

Here we present another example of using nested classes. The domain is text formatting as known from e.g. Microsoft Word, and LaTex. The complexity of most of these systems is huge. Here we will thus stick to a very simple text formatting system. <\/p>\n\n\n\n

The phenomena of our domain are documents that consists of a number of paragraphs. The paragraphs of a document are formatted according to a given template, which defines a number of styles for formating the paragraphs in the document. A style may e.g. define the font being used, the size of the font, the form of the font, etc. A paragraph may be left-aligned, centred, right-aligned, og with flushed margins. <\/p>\n\n\n\n

In addition to styles, there are also properties associated with a document like page orientation (portrait or landscape), paper size (like A4, A3, and US letter), and number of columns.<\/p>\n\n\n\n

To avoid ending up with a large example, we will keep the possible template and style properties to a minimum. The text formatter we define, can handle documents with two types of paragraphs: headings and body text. Headings are automatically numbered sequentially and body texts are indented by three spaces. A document has only one property which is the maximum length of a line in a paragraph.<\/p>\n\n\n\n

We start by defining class Document<\/code>:<\/p>\n\n\n\n

class<\/strong> Document(temp: ref<\/strong> Template, lineMax: var<\/strong> integer):\n    class<\/strong> Paragraph(theContent: var<\/strong> String, theStyle: ref<\/strong> Style):\n        format -> theStyledPar: var<\/strong> String:\n            theStyledPar :=\n                   theStyle.format(theContent.asString,lineMax)\n    content: obj<\/strong> OrderedList(Paragraph)    \n    addPar(P: ref<\/strong> Paragraph):\n       content.insert(P)\n    format -> formattedContent: var<\/strong> String:\n       theStyledPar := \"\"\n       content.scan \n          formattedContent := formattedContent + current.format\n    print:\n       print(format)<\/code><\/pre>\n\n\n\n