Function focusCodeMirror

vditor/src/ts/codeBlock/codeMirrorManager.ts:1694–1735

(
    blockElement: HTMLElement,
    collapseToStart = true,
    vditor?: IVditor,
)

    preserveEditorScroll(vditor, apply);
};

export const focusCodeMirror = (
    blockElement: HTMLElement,
    collapseToStart = true,
    vditor?: IVditor,
) => {
    if (!blockElement) {
        return;
    }
    if (!bindings.get(blockElement) && vditor) {
        if (isLazyManagedCodeBlock(blockElement)) {
            enforceMaxMounted(vditor, blockElement);
        }
        mountCodeMirror(blockElement, vditor, true);
    }
    const binding = bindings.get(blockElement);
    if (!binding) {
        return;
    }
    const hadFocus = binding.view.hasFocus;
    const applyFocus = () => {
        focusCmViewWithoutScroll(binding.view);
        if (!hadFocus) {
            if (collapseToStart) {
                binding.view.dispatch({
                    selection: { anchor: 0, head: 0 },
                    scrollIntoView: false,
                });
            } else {
                const length = binding.view.state.doc.length;
                binding.view.dispatch({
                    selection: { anchor: length, head: length },
                    scrollIntoView: false,
                });
            }
        }
    };
    if (vditor) {
        preserveEditorScroll(vditor, applyFocus);
    } else {
        applyFocus();
    }
};

/** @deprecated use focusCodeMirror */