87 lines
2.7 KiB
Go
87 lines
2.7 KiB
Go
// Cthulhu screen reader.
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// Copyright (c) 2026 Storm Dragon
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// Authors: Storm Dragon, Angus Kola
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//
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// This program is free software: you can redistribute it and/or modify it
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// under the terms of the GNU General Public License as published by the Free
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// Software Foundation, either version 3 of the License, or (at your option)
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// any later version.
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//
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// This program is distributed in the hope that it will be useful, but WITHOUT
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// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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// more details.
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//
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// You should have received a copy of the GNU General Public License along with
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// this program. If not, see <https://www.gnu.org/licenses/gpl-3.0.html>.
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package review
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import (
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"context"
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"errors"
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"time"
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"git.stormux.org/storm/cthulhu/internal/atspi"
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)
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// ReadDocumentLine queues a caret-line capture and assembly request.
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func (worker *Worker) ReadDocumentLine(focus atspi.ObjectID, offset int) (uint64, error) {
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if !focus.Valid() {
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return 0, ErrInvalidDirection
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}
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sequence := worker.lineSequence.Add(1)
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if sequence == 0 {
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sequence = worker.lineSequence.Add(1)
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}
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select {
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case worker.requests <- request{documentEpoch: worker.documentEpoch.Load(), line: true, lineRequest: sequence, lineFocus: focus, lineOffset: offset, queuedAt: time.Now()}:
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return sequence, nil
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default:
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return 0, ErrRequestQueueFull
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}
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}
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func (worker *Worker) readDocumentLine(ctx context.Context, tree *atspi.AccessibleTree, request uint64, focus atspi.ObjectID, offset int) (Result, *atspi.AccessibleTree) {
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result := Result{DocumentLine: true, DocumentLineRequest: request, DocumentLineFocus: focus}
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if !focus.Valid() {
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result.Err = ErrNoCurrent
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return result, tree
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}
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if tree != nil {
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if reference, err := tree.Reference(focus); err == nil {
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if line, err := tree.DocumentLineAtOffset(ctx, reference, offset); err == nil {
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result.DocumentLineData = line
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result.Moved = true
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return result, tree
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}
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}
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}
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captureContext, cancel := context.WithTimeout(ctx, worker.captureTimeout)
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captureStarted := time.Now()
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tree, err := worker.capturer.CaptureDocumentText(captureContext, focus)
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result.CaptureDuration = time.Since(captureStarted)
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cancel()
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if err != nil {
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result.Err = err
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return result, tree
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}
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if tree == nil {
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result.Err = errors.New("capture document text tree: nil tree")
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return result, nil
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}
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reference, err := tree.Reference(focus)
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if err != nil {
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result.Err = err
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return result, tree
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}
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line, err := tree.DocumentLineAtOffset(ctx, reference, offset)
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if err != nil {
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result.Err = err
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return result, tree
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}
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result.DocumentLineData = line
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result.Moved = true
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return result, tree
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}
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