DocumentVisitor — Aspose.Note FOSS for Python API Reference
Klasa: DocumentVisitor
Package: aspose.note Import: from aspose.note import DocumentVisitor
DocumentVisitor je apstraktna osnovna klasa za obilazak stabla dokumenta OneNote pomoću obrasca posjetitelja. Naslijedite je i prepišite samo metode posjete koje su vam potrebne. Pozovite node.Accept(visitor) za pokretanje obilaska s bilo kojeg čvora; pozovite doc.Accept(visitor) za obilazak cijelog dokumenta.
Sve metode u osnovnoj klasi su bez učinka (vraćaju None). Prepišite samo one koje su relevantne za vaš slučaj upotrebe.
Metode posjete
| Method | Pozvano kada | Tip parametra |
|---|---|---|
VisitDocumentStart(document) | Ulazak u Document čvor | Document |
VisitDocumentEnd(document) | Napustanje Document čvora | Document |
VisitPageStart(page) | Ulazak u Page čvor | Page |
VisitPageEnd(page) | Napustiti Page čvor | Page |
VisitTitleStart(title) | Ulazak u Title čvor | Title |
VisitTitleEnd(title) | Ostavljajući Title node | Title |
VisitOutlineStart(outline) | Ulazak u Outline node | Outline |
VisitOutlineEnd(outline) | Napustiti Outline čvor | Outline |
VisitOutlineElementStart(outline_element) | Ulazak u OutlineElement čvor | OutlineElement |
VisitOutlineElementEnd(outline_element) | Napustanje OutlineElement čvor | OutlineElement |
VisitRichTextStart(rich_text) | Ulazak u RichText node | RichText |
VisitRichTextEnd(rich_text) | Odlazak RichText node | RichText |
VisitImageStart(image) | Ulazak u Image čvor | Image |
VisitImageEnd(image) | Napustiti Image čvor | Image |
Sve metode imaju potpis:
def VisitXxxStart(self, node: NodeType) -> None: ...
def VisitXxxEnd(self, node: NodeType) -> None: ...Redoslijed traversiranja
Accept raspoređuje u dubinskom, pre-order pretraživanju:
VisitDocumentStartse poziva pri ulasku u dokument.- Svako dijete
Pagese posjećuje rekurzivno (PageStart → children → PageEnd). - Unutar
Page:TitleStart/End, zatim svakoOutline(OutlineStart → OutlineElements → OutlineEnd). - Unutar jednog
OutlineElement:OutlineElementStart, zatim djeca (RichText,Image, ugniježđeni elementi), zatimOutlineElementEnd. VisitDocumentEndse poziva nakon što su sve stranice posjećene.
Primjeri upotrebe
Prikupi sve naslove stranica
from aspose.note import Document, DocumentVisitor, Page, Title
class TitleCollector(DocumentVisitor):
def __init__(self):
self.titles = []
def VisitTitleStart(self, title: Title) -> None:
if title.TitleText:
self.titles.append(title.TitleText.Text)
doc = Document("MyNotes.one")
visitor = TitleCollector()
doc.Accept(visitor)
print(visitor.titles)Izbroj čvorove po tipu
from aspose.note import Document, DocumentVisitor, Page, RichText, Image
class NodeCounter(DocumentVisitor):
def __init__(self):
self.pages = 0
self.rich_texts = 0
self.images = 0
def VisitPageStart(self, page: Page) -> None:
self.pages += 1
def VisitRichTextStart(self, rich_text: RichText) -> None:
self.rich_texts += 1
def VisitImageStart(self, image: Image) -> None:
self.images += 1
doc = Document("MyNotes.one")
counter = NodeCounter()
doc.Accept(counter)
print(f"Pages: {counter.pages}, RichText: {counter.rich_texts}, Images: {counter.images}")Izvuci sve slike putem posjetitelja
from aspose.note import Document, DocumentVisitor, Image
class ImageExtractor(DocumentVisitor):
def __init__(self):
self.images = []
def VisitImageStart(self, image: Image) -> None:
if image.Bytes:
self.images.append(image)
doc = Document("MyNotes.one")
extractor = ImageExtractor()
doc.Accept(extractor)
for i, img in enumerate(extractor.images):
filename = img.FileName or f"image_{i}.bin"
with open(filename, "wb") as f:
f.write(img.Bytes)
print(f"Saved: {filename} ({len(img.Bytes)} bytes)")Izradi izvještaj o strukturi dokumenta
from aspose.note import (
Document, DocumentVisitor,
Page, Outline, OutlineElement, RichText
)
class OutlineReporter(DocumentVisitor):
def __init__(self):
self._indent = 0
self.lines = []
def VisitPageStart(self, page: Page) -> None:
title = page.Title.TitleText.Text if page.Title and page.Title.TitleText else "(untitled)"
self.lines.append(f"PAGE: {title}")
self._indent = 1
def VisitOutlineElementStart(self, elem: OutlineElement) -> None:
self._indent = 2 + elem.IndentLevel
def VisitRichTextStart(self, rt: RichText) -> None:
if rt.Text.strip():
self.lines.append(" " * self._indent + rt.Text.strip())
doc = Document("MyNotes.one")
reporter = OutlineReporter()
doc.Accept(reporter)
print("\n".join(reporter.lines))Posjeti iz podčvora
Accept se može pozvati na bilo kojem čvoru, ne samo na korijenskom dokumentu:
from aspose.note import Document, Page, DocumentVisitor, RichText
class TextPrinter(DocumentVisitor):
def VisitRichTextStart(self, rt: RichText) -> None:
print(rt.Text)
doc = Document("MyNotes.one")
pages = doc.GetChildNodes(Page)
if pages:
# Visit only the first page
pages[0].Accept(TextPrinter())Podržane vrste čvorova
Posjetitelj trenutno obrađuje ove vrste čvorova: Document, Page, Title, Outline, OutlineElement, RichText, Image. Ne postoje metode posjete za Table, TableRow, TableCell, AttachedFile, ili NumberList — ti čvorovi se dosežu putem GetChildNodes traversala umjesto.
