Method, apparatus, device and medium for managing an element in electronic book

An electronic device comprising:

• at least one processing unit;
• and
• at least one memory coupled to the at least one processing unit and storing instructions for execution by the at least one processing unit, the instructions, when executed by the at least one processing unit, causing the electronic device to perform acts for managing an element in an electronic book, the acts comprising:
• establishing, by an electronic device, a block node based on a paragraph in the electronic book, the paragraph comprising at least one element, the at least one element comprising at least one of a text element or a non-text element;
• establishing, by an electronic device, a text sub node of the block node based on a text element comprised in the paragraph, the text element comprising at least one character;
• establishing, by an electronic device, a non-text sub node of the block node based on a non-text element comprised in the paragraph, wherein the non-text element is identified with the block node, the non-text sub node, and an offset of the non-text element;
• generating, by the electronic device, a hierarchical structure for identifying the at least one element based on the block node, the text sub node, and the non-text sub node;
• in response to receiving a selection action in a display page of the electronic book, determining a selected element in the at least one element based on a coordinate of the selection action in the display page and a mapping relationship between the coordinate and the at least one element;
• and
• recording the selected element based on the hierarchical structure.

A non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, causes the processor to implement acts for managing an element in an electronic book, the acts comprising:

• establishing, by an electronic device, a block node based on a paragraph in the electronic book, the paragraph comprising at least one element, the at least one element comprising at least one of a text element or a non-text element;
• establishing, by an electronic device, a text sub node of the block node based on a text element comprised in the paragraph, the text element comprising at least one character;
• establishing, by an electronic device, a non-text sub node of the block node based on a non-text element comprised in the paragraph, wherein the non-text element is identified with the block node, the non-text sub node, and an offset of the non-text element;
• generating, by the electronic device, a hierarchical structure for identifying the at least one element based on the block node, the text sub node, and the non-text sub node;
• in response to receiving a selection action in a display page of the electronic book, determining a selected element in the at least one element based on a coordinate of the selection action in the display page and a mapping relationship between the coordinate and the at least one element;
• and
• recording the selected element based on the hierarchical structure.