Golang xrefs.Patcher类代码示例

// Decorations implements part of the xrefs Service interface.
func (t *tableImpl) Decorations(ctx context.Context, req *xpb.DecorationsRequest) (*xpb.DecorationsReply, error) {
	if req.GetLocation() == nil || req.GetLocation().Ticket == "" {
		return nil, errors.New("missing location")
	}

	ticket, err := kytheuri.Fix(req.GetLocation().Ticket)
	if err != nil {
		return nil, fmt.Errorf("invalid ticket %q: %v", req.GetLocation().Ticket, err)
	}

	decor, err := t.fileDecorations(ctx, ticket)
	if err == table.ErrNoSuchKey {
		return nil, fmt.Errorf("decorations not found for file %q", ticket)
	} else if err != nil {
		return nil, fmt.Errorf("lookup error for file decorations %q: %v", ticket, err)
	}

	text := decor.SourceText
	if len(req.DirtyBuffer) > 0 {
		text = req.DirtyBuffer
	}
	norm := xrefs.NewNormalizer(text)

	loc, err := norm.Location(req.GetLocation())
	if err != nil {
		return nil, err
	}

	reply := &xpb.DecorationsReply{Location: loc}

	if req.SourceText {
		reply.Encoding = decor.Encoding
		if loc.Kind == xpb.Location_FILE {
			reply.SourceText = text
		} else {
			reply.SourceText = text[loc.Start.ByteOffset:loc.End.ByteOffset]
		}
	}

	if req.References {
		// Set of node tickets for which to retrieve facts.  These are the nodes
		// used in the returned references (both anchor sources and node targets).
		nodeTickets := stringset.New()

		var patcher *xrefs.Patcher
		var offsetMapping map[string]span // Map from anchor ticket to patched span
		if len(req.DirtyBuffer) > 0 {
			patcher = xrefs.NewPatcher(decor.SourceText, req.DirtyBuffer)
			offsetMapping = make(map[string]span)
		}

		// The span with which to constrain the set of returned anchor references.
		var startBoundary, endBoundary int32
		if loc.Kind == xpb.Location_FILE {
			startBoundary = 0
			endBoundary = int32(len(text))
		} else {
			startBoundary = loc.Start.ByteOffset
			endBoundary = loc.End.ByteOffset
		}

		reply.Reference = make([]*xpb.DecorationsReply_Reference, 0, len(decor.Decoration))
		for _, d := range decor.Decoration {
			start, end, exists := patcher.Patch(d.Anchor.StartOffset, d.Anchor.EndOffset)
			// Filter non-existent anchor.  Anchors can no longer exist if we were
			// given a dirty buffer and the anchor was inside a changed region.
			if exists {
				if start >= startBoundary && end <= endBoundary {
					if offsetMapping != nil {
						// Save the patched span to update the corresponding facts of the
						// anchor node in reply.Node.
						offsetMapping[d.Anchor.Ticket] = span{start, end}
					}
					reply.Reference = append(reply.Reference, decorationToReference(norm, d))
					nodeTickets.Add(d.Anchor.Ticket)
					nodeTickets.Add(d.TargetTicket)
				}
			}
		}

		// Only request Nodes when there are fact filters given.
		if len(req.Filter) > 0 {
			// Retrieve facts for all nodes referenced in the file decorations.
			nodesReply, err := t.Nodes(ctx, &xpb.NodesRequest{
				Ticket: nodeTickets.Slice(),
				Filter: req.Filter,
			})
			if err != nil {
				return nil, fmt.Errorf("error getting nodes: %v", err)
			}
			reply.Node = nodesReply.Node
		}

		// Patch anchor node facts in reply to match dirty buffer
		if len(offsetMapping) > 0 {
			for _, n := range reply.Node {
				if span, ok := offsetMapping[n.Ticket]; ok {
					for _, f := range n.Fact {
						switch f.Name {
//.........这里部分代码省略.........

// Decorations implements part of the xrefs Service interface.
func (t *tableImpl) Decorations(ctx context.Context, req *xpb.DecorationsRequest) (*xpb.DecorationsReply, error) {
	if req.GetLocation() == nil || req.GetLocation().Ticket == "" {
		return nil, errors.New("missing location")
	}

	ticket, err := kytheuri.Fix(req.GetLocation().Ticket)
	if err != nil {
		return nil, fmt.Errorf("invalid ticket %q: %v", req.GetLocation().Ticket, err)
	}

	decor, err := t.fileDecorations(ctx, ticket)
	if err == table.ErrNoSuchKey {
		return nil, xrefs.ErrDecorationsNotFound
	} else if err != nil {
		return nil, fmt.Errorf("lookup error for file decorations %q: %v", ticket, err)
	}

	text := decor.File.Text
	if len(req.DirtyBuffer) > 0 {
		text = req.DirtyBuffer
	}
	norm := xrefs.NewNormalizer(text)

	loc, err := norm.Location(req.GetLocation())
	if err != nil {
		return nil, err
	}

	reply := &xpb.DecorationsReply{Location: loc}

	if req.SourceText {
		reply.Encoding = decor.File.Encoding
		if loc.Kind == xpb.Location_FILE {
			reply.SourceText = text
		} else {
			reply.SourceText = text[loc.Start.ByteOffset:loc.End.ByteOffset]
		}
	}

	if req.References {
		patterns := xrefs.ConvertFilters(req.Filter)

		var patcher *xrefs.Patcher
		if len(req.DirtyBuffer) > 0 {
			patcher = xrefs.NewPatcher(decor.File.Text, req.DirtyBuffer)
		}

		// The span with which to constrain the set of returned anchor references.
		var startBoundary, endBoundary int32
		spanKind := req.SpanKind
		if loc.Kind == xpb.Location_FILE {
			startBoundary = 0
			endBoundary = int32(len(text))
			spanKind = xpb.DecorationsRequest_WITHIN_SPAN
		} else {
			startBoundary = loc.Start.ByteOffset
			endBoundary = loc.End.ByteOffset
		}

		reply.Reference = make([]*xpb.DecorationsReply_Reference, 0, len(decor.Decoration))
		reply.Nodes = make(map[string]*xpb.NodeInfo)

		seenTarget := stringset.New()

		// Reference.TargetTicket -> NodeInfo (superset of reply.Nodes)
		var nodes map[string]*xpb.NodeInfo
		if len(patterns) > 0 {
			nodes = make(map[string]*xpb.NodeInfo)
			for _, n := range decor.Target {
				nodes[n.Ticket] = nodeToInfo(patterns, n)
			}
		}

		// Reference.TargetTicket -> []Reference set
		var refs map[string][]*xpb.DecorationsReply_Reference
		// ExpandedAnchor.Ticket -> ExpandedAnchor
		var defs map[string]*srvpb.ExpandedAnchor
		if req.TargetDefinitions {
			refs = make(map[string][]*xpb.DecorationsReply_Reference)
			reply.DefinitionLocations = make(map[string]*xpb.Anchor)

			defs = make(map[string]*srvpb.ExpandedAnchor)
			for _, def := range decor.TargetDefinitions {
				defs[def.Ticket] = def
			}
		}

		for _, d := range decor.Decoration {
			start, end, exists := patcher.Patch(d.Anchor.StartOffset, d.Anchor.EndOffset)
			// Filter non-existent anchor.  Anchors can no longer exist if we were
			// given a dirty buffer and the anchor was inside a changed region.
			if exists {
				if xrefs.InSpanBounds(spanKind, start, end, startBoundary, endBoundary) {
					d.Anchor.StartOffset = start
					d.Anchor.EndOffset = end

					r := decorationToReference(norm, d)
					if req.TargetDefinitions {
						if def, ok := defs[d.TargetDefinition]; ok {
//.........这里部分代码省略.........

// Decorations implements part of the xrefs Service interface.
func (t *tableImpl) Decorations(ctx context.Context, req *xpb.DecorationsRequest) (*xpb.DecorationsReply, error) {
	if req.GetLocation() == nil || req.GetLocation().Ticket == "" {
		return nil, errors.New("missing location")
	}

	ticket, err := kytheuri.Fix(req.GetLocation().Ticket)
	if err != nil {
		return nil, fmt.Errorf("invalid ticket %q: %v", req.GetLocation().Ticket, err)
	}

	decor, err := t.fileDecorations(ctx, ticket)
	if err == table.ErrNoSuchKey {
		return nil, fmt.Errorf("decorations not found for file %q", ticket)
	} else if err != nil {
		return nil, fmt.Errorf("lookup error for file decorations %q: %v", ticket, err)
	}

	text := decor.SourceText
	if len(req.DirtyBuffer) > 0 {
		text = req.DirtyBuffer
	}
	norm := xrefs.NewNormalizer(text)

	loc, err := norm.Location(req.GetLocation())
	if err != nil {
		return nil, err
	}

	reply := &xpb.DecorationsReply{Location: loc}

	if req.SourceText {
		reply.Encoding = decor.Encoding
		if loc.Kind == xpb.Location_FILE {
			reply.SourceText = text
		} else {
			reply.SourceText = text[loc.Start.ByteOffset:loc.End.ByteOffset]
		}
	}

	if req.References {
		patterns := xrefs.ConvertFilters(req.Filter)
		nodeTickets := stringset.New()

		var patcher *xrefs.Patcher
		var offsetMapping map[string]span // Map from anchor ticket to patched span
		if len(req.DirtyBuffer) > 0 {
			patcher = xrefs.NewPatcher(decor.SourceText, req.DirtyBuffer)
			offsetMapping = make(map[string]span)
		}

		// The span with which to constrain the set of returned anchor references.
		var startBoundary, endBoundary int32
		if loc.Kind == xpb.Location_FILE {
			startBoundary = 0
			endBoundary = int32(len(text))
		} else {
			startBoundary = loc.Start.ByteOffset
			endBoundary = loc.End.ByteOffset
		}

		reply.Reference = make([]*xpb.DecorationsReply_Reference, 0, len(decor.Decoration))
		for _, d := range decor.Decoration {
			start, end, exists := patcher.Patch(d.Anchor.StartOffset, d.Anchor.EndOffset)
			// Filter non-existent anchor.  Anchors can no longer exist if we were
			// given a dirty buffer and the anchor was inside a changed region.
			if exists {
				if start >= startBoundary && end <= endBoundary {
					if offsetMapping != nil {
						// Save the patched span to update the corresponding facts of the
						// anchor node in reply.Node.
						offsetMapping[d.Anchor.Ticket] = span{start, end}
					}
					reply.Reference = append(reply.Reference, decorationToReference(norm, d))

					if len(patterns) > 0 && !nodeTickets.Contains(d.Target.Ticket) {
						nodeTickets.Add(d.Target.Ticket)
						reply.Node = append(reply.Node, nodeToInfo(patterns, d.Target))
					}
				}
			}
		}
	}

	return reply, nil
}