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hxc3-command

v0.0.6

Published

command support ie7+

Downloads

9

Readme

hxc3-command

redo undo

Install

hxc3-command

Screenshot

pic

Demo

Development:

npm install
npm run dev

open browser:

http://127.0.0.1:8080/demo1/    

原理 每次操作只记录操作的具体位置的变动, 而不是把整份数据做操作前后的备份。

例如 如果要删除表格第一行,第一列的数据, 只需要缓存住 内容变动的位置, 内容变动前后的数据。 这样撤销时,仍能根据这三个参数返回。

Usage

step1: create a new "commonCommand.js" File in your project, e.g: demo1/commonCommand.js

step2: write a pair of functions, tips: the value of editCellContent returned, will be the parameters of editCellContentRollup;

commonCommand.js:

var commonCommand = {
    /**
     * editOneCell
     * @param  {[type]} d [description]
     * @return {[type]}   [description]
     */
    editCellContent: function (d){
        var xpos = d[0];
        var ypos = d[1];
        var afterEditCon = d[2];
        var beforeEditCon = d[3];
        var data = d[4];
        var cbk = d[5];
        data[ypos][xpos] = afterEditCon;
        cbk('edit cell');
        return d;
    },
    editCellContentRollup: function (d){
        var xpos = d[0];
        var ypos = d[1];
        var afterEditCon = d[2];
        var beforeEditCon = d[3];
        var data = d[4];
        var cbk = d[5];
        data[ypos][xpos] = beforeEditCon;
        cbk('rollup edit cell');
        return d;
    }
}

step3: register a command before use, 注意 每个命令执行过以后, 传入的参数都是在缓存中的, 会一直存在直到程序退出,所以每条命令传入的参数务必控制大小。 如例子中虽然传入了data表格的全部数据,但因为数组是引用方式调用,所以该命令无论添加几次执行,缓存中还是那一个数组地址。

当然也可以在cbk回调函数再执行对data的修改

// global
const hxc3 = {};

function registerCommand() {
    var command = new MacroCommand();
    hxc3.excelCommand = command;

    ////////////////////
    // redo undo 注册一下 //
    ////////////////////
    // edit cell
    command.action("editCellContent", commonCommand.editCellContent, commonCommand.editCellContentRollup);

    // delte cell
    command.action("editCol", commonCommand.editCol, commonCommand.editColRollup);

    // bind undo btn
    document.getElementById('menubtn_undo').onclick = function () {
        command.undo();
    };
    // bind redo btn
    document.getElementById('menubtn_redo').onclick = function () {
        command.redo();
    };
}

registerCommand();

step4: 调用


// excute a command
document.getElementById('btn1').onclick = function () {
    // 数组对应的位置
    hxc3.excelCommand.do("editCellContent", [
        0,
        0,
        'data1first',
        '73.98', 
        data,
        function(msg){
            console.log(msg);
            // do something
        }
    ]);
}