Function checkFloatBar

Picviewer CE+/dist.user.js:26497–27084

(_target, type, canPreview, clientX, clientY, altKey, composedTarget)

        }

        function checkFloatBar(_target, type, canPreview, clientX, clientY, altKey, composedTarget) {
            let target = _target;
            if (!target || target.id == "pv-float-bar-container" ||
                (target.parentNode && (target.parentNode.id == "icons" || target.parentNode.className == "search-jumper-btn")) ||
                (target.className &&
                 (/^pv\-/.test(target.className) ||
                  target.className == "whx-a" ||
                  target.className == "whx-a-node" ||
                  target.className == "search-jumper-btn" ||
                  target.classList.contains("pv-icon") ||
                  target.classList.contains("ks-imagezoom-lens")))) {
                return;
            }
            if (target.nodeName.toUpperCase() == "PICTURE"){
                target = target.querySelector("img");
            }
            if (type == "mousemove") {
                if ((uniqueImgWin && !uniqueImgWin.removed && !uniqueImgWin.previewed)) {
                    uniqueImgWin.followPos(clientX, clientY);
                    if (!canPreview) {
                        uniqueImgWin.remove();
                    }
                    return;
                } else if (target.nodeName.toUpperCase() != 'IMG' || !canPreview) {
                    return;
                }
            }

            if (target.nodeName.toUpperCase() == 'IMG' && !target.naturalHeight) {
                target = target.parentNode;
            }
            // 扩展模式，检查前面一个是否为 img
            if (target.nodeName.toUpperCase() != 'IMG' && matchedRule.rules.length > 0 && matchedRule.ext) {
                var _type = typeof matchedRule.ext;
                if (_type == 'string') {
                    switch (matchedRule.ext) {
                        case 'previous':
                            target = target.previousElementSibling || target;
                            break;
                        case 'next':
                            target = target.nextElementSibling || target;
                            break;
                        case 'previous-2':
                            target = (target.previousElementSibling &&
                                target.previousElementSibling.previousElementSibling) || target;
                            break;
                    }
                } else if (_type == 'function') {
                    try {
                        target = matchedRule.ext(target) || target;
                    } catch(ex) {
                        throwErrorInfo(ex);
                    }

                    if (!target) return;
                }
            }
            let bgReg = /.*url\(\s*["']?([^ad\s'"#].+?)["']?\s*\)([^'"]|$)/i;