moveable_rows.js

var MoveRows = function(table){

    this.table = table; //hold Tabulator object
    this.placeholderElement = this.createPlaceholderElement();
    this.hoverElement = false; //floating row header element
    this.checkTimeout = false; //click check timeout holder
    this.checkPeriod = 150; //period to wait on mousedown to consider this a move and not a click
    this.moving = false; //currently moving row
    this.toRow = false; //destination row
    this.toRowAfter = false; //position of moving row relative to the desitnation row
    this.hasHandle = false; //row has handle instead of fully movable row
    this.startY = 0; //starting Y position within header element
    this.startX = 0; //starting X position within header element

    this.moveHover = this.moveHover.bind(this);
    this.endMove = this.endMove.bind(this);
    this.tableRowDropEvent = false;

    this.touchMove = false;

    this.connection = false;
    this.connections = [];

    this.connectedTable = false;
    this.connectedRow = false;
};

MoveRows.prototype.createPlaceholderElement = function(){
    var el = document.createElement("div");

    el.classList.add("tabulator-row");
    el.classList.add("tabulator-row-placeholder");

    return el;
};


MoveRows.prototype.initialize = function(handle){
    this.connection = this.table.options.movableRowsConnectedTables;
};

MoveRows.prototype.setHandle = function(handle){
    this.hasHandle = handle;
};

MoveRows.prototype.initializeGroupHeader = function(group){
    var self = this,
    config = {},
    rowEl;

    //inter table drag drop
    config.mouseup = function(e){
        self.tableRowDrop(e, row);
    }.bind(self);

    //same table drag drop
    config.mousemove = function(e){
        if(((e.pageY - Tabulator.prototype.helpers.elOffset(group.element).top) + self.table.rowManager.element.scrollTop) > (group.getHeight() / 2)){
            if(self.toRow !== group || !self.toRowAfter){
                var rowEl = group.getElement();
                rowEl.parentNode.insertBefore(self.placeholderElement, rowEl.nextSibling);
                self.moveRow(group, true);
            }
        }else{
            if(self.toRow !== group || self.toRowAfter){
                var rowEl = group.getElement();
                if(rowEl.previousSibling){
                    rowEl.parentNode.insertBefore(self.placeholderElement, rowEl);
                    self.moveRow(group, false);
                }
            }
        }
    }.bind(self);

    group.modules.moveRow = config;
};

MoveRows.prototype.initializeRow = function(row){
    var self = this,
    config = {},
    rowEl;

    //inter table drag drop
    config.mouseup = function(e){
        self.tableRowDrop(e, row);
    }.bind(self);

    //same table drag drop
    config.mousemove = function(e){
        if(((e.pageY - Tabulator.prototype.helpers.elOffset(row.element).top) + self.table.rowManager.element.scrollTop) > (row.getHeight() / 2)){
            if(self.toRow !== row || !self.toRowAfter){
                var rowEl = row.getElement();
                rowEl.parentNode.insertBefore(self.placeholderElement, rowEl.nextSibling);
                self.moveRow(row, true);
            }
        }else{
            if(self.toRow !== row || self.toRowAfter){
                var rowEl = row.getElement();
                rowEl.parentNode.insertBefore(self.placeholderElement, rowEl);
                self.moveRow(row, false);
            }
        }
    }.bind(self);


    if(!this.hasHandle){

        rowEl = row.getElement();

        rowEl.addEventListener("mousedown", function(e){
            if(e.which === 1){
                self.checkTimeout = setTimeout(function(){
                    self.startMove(e, row);
                }, self.checkPeriod);
            }
        });

        rowEl.addEventListener("mouseup", function(e){
            if(e.which === 1){
                if(self.checkTimeout){
                    clearTimeout(self.checkTimeout);
                }
            }
        });

        this.bindTouchEvents(row, row.getElement());
    }

    row.modules.moveRow = config;
};

MoveRows.prototype.initializeCell = function(cell){
    var self = this,
    cellEl = cell.getElement();

    cellEl.addEventListener("mousedown", function(e){
        if(e.which === 1){
            self.checkTimeout = setTimeout(function(){
                self.startMove(e, cell.row);
            }, self.checkPeriod);
        }
    });

    cellEl.addEventListener("mouseup", function(e){
        if(e.which === 1){
            if(self.checkTimeout){
                clearTimeout(self.checkTimeout);
            }
        }
    });

    this.bindTouchEvents(cell.row, cell.getElement());
};

MoveRows.prototype.bindTouchEvents = function(row, element){
    var self = this,
    startYMove = false, //shifting center position of the cell
    dir = false,
    currentRow, nextRow, prevRow, nextRowHeight, prevRowHeight, nextRowHeightLast, prevRowHeightLast;

    element.addEventListener("touchstart", function(e){
        self.checkTimeout = setTimeout(function(){
            self.touchMove = true;
            currentRow = row;
            nextRow = row.nextRow();
            nextRowHeight = nextRow ? nextRow.getHeight()/2 : 0;
            prevRow = row.prevRow();
            prevRowHeight = prevRow ? prevRow.getHeight()/2 : 0;
            nextRowHeightLast = 0;
            prevRowHeightLast = 0;
            startYMove = false;

            self.startMove(e, row);
        }, self.checkPeriod);
    }, {passive: true});
    this.moving, this.toRow, this.toRowAfter
    element.addEventListener("touchmove", function(e){

        var halfCol, diff, moveToRow;

        if(self.moving){
            e.preventDefault();

            self.moveHover(e);

            if(!startYMove){
                startYMove = e.touches[0].pageY;
            }

            diff = e.touches[0].pageY - startYMove;

            if(diff > 0){
                if(nextRow && diff - nextRowHeightLast > nextRowHeight){
                    moveToRow = nextRow;

                    if(moveToRow !== row){
                        startYMove = e.touches[0].pageY
                        moveToRow.getElement().parentNode.insertBefore(self.placeholderElement, moveToRow.getElement().nextSibling);
                        self.moveRow(moveToRow, true);
                    }
                }
            }else{
                if(prevRow && -diff - prevRowHeightLast >  prevRowHeight){
                    moveToRow = prevRow;

                    if(moveToRow !== row){
                        startYMove = e.touches[0].pageY;
                        moveToRow.getElement().parentNode.insertBefore(self.placeholderElement, moveToRow.getElement());
                        self.moveRow(moveToRow, false);
                    }
                }
            }

            if(moveToRow){
                currentRow = moveToRow;
                nextRow = moveToRow.nextRow();
                nextRowHeightLast = nextRowHeight;
                nextRowHeight = nextRow ? nextRow.getHeight() / 2 : 0;
                prevRow = moveToRow.prevRow();
                prevRowHeightLast = prevRowHeight;
                prevRowHeight = prevRow ? prevRow.getHeight() / 2 : 0;
            }
        }
    });

    element.addEventListener("touchend", function(e){
        if(self.checkTimeout){
            clearTimeout(self.checkTimeout);
        }
        if(self.moving){
            self.endMove(e);
            self.touchMove = false;
        }
    });
};

MoveRows.prototype._bindMouseMove = function(){
    var self = this;

    self.table.rowManager.getDisplayRows().forEach(function(row){
        if((row.type === "row" || row.type === "group") && row.modules.moveRow.mousemove){
            row.getElement().addEventListener("mousemove", row.modules.moveRow.mousemove);
        }
    });
};

MoveRows.prototype._unbindMouseMove = function(){
    var self = this;

    self.table.rowManager.getDisplayRows().forEach(function(row){
        if((row.type === "row" || row.type === "group")  && row.modules.moveRow.mousemove){
            row.getElement().removeEventListener("mousemove", row.modules.moveRow.mousemove);
        }
    });
};

MoveRows.prototype.startMove = function(e, row){
    var element = row.getElement();

    this.setStartPosition(e, row);

    this.moving = row;

    this.table.element.classList.add("tabulator-block-select");

    //create placeholder
    this.placeholderElement.style.width = row.getWidth() + "px";
    this.placeholderElement.style.height = row.getHeight() + "px";

    if(!this.connection){
        element.parentNode.insertBefore(this.placeholderElement, element);
        element.parentNode.removeChild(element);
    }else{
        this.table.element.classList.add("tabulator-movingrow-sending");
        this.connectToTables(row);
    }

    //create hover element
    this.hoverElement = element.cloneNode(true);
    this.hoverElement.classList.add("tabulator-moving");

    if(this.connection){
        document.body.appendChild(this.hoverElement);
        this.hoverElement.style.left = "0";
        this.hoverElement.style.top = "0";
        this.hoverElement.style.width = this.table.element.clientWidth + "px";
        this.hoverElement.style.whiteSpace = "nowrap";
        this.hoverElement.style.overflow = "hidden";
        this.hoverElement.style.pointerEvents = "none";
    }else{
        this.table.rowManager.getTableElement().appendChild(this.hoverElement);

        this.hoverElement.style.left = "0";
        this.hoverElement.style.top = "0";

        this._bindMouseMove();
    }

    document.body.addEventListener("mousemove", this.moveHover);
    document.body.addEventListener("mouseup", this.endMove);

    this.moveHover(e);
};


MoveRows.prototype.setStartPosition = function(e, row){
    var pageX = this.touchMove ? e.touches[0].pageX : e.pageX,
    pageY = this.touchMove ? e.touches[0].pageY : e.pageY,
    element, position;

    element = row.getElement();
    if(this.connection){
        position = element.getBoundingClientRect();

        this.startX = position.left - pageX + window.pageXOffset;
        this.startY = position.top - pageY + window.pageYOffset;
    }else{
        this.startY = (pageY - element.getBoundingClientRect().top);
    }
};

MoveRows.prototype.endMove = function(e){
    if(!e || e.which === 1 || this.touchMove){
        this._unbindMouseMove();

        if(!this.connection){
            this.placeholderElement.parentNode.insertBefore(this.moving.getElement(), this.placeholderElement.nextSibling);
            this.placeholderElement.parentNode.removeChild(this.placeholderElement);
        }

        this.hoverElement.parentNode.removeChild(this.hoverElement);

        this.table.element.classList.remove("tabulator-block-select");

        if(this.toRow){
            this.table.rowManager.moveRow(this.moving, this.toRow, this.toRowAfter);
        }

        this.moving = false;
        this.toRow = false;
        this.toRowAfter = false;

        document.body.removeEventListener("mousemove", this.moveHover);
        document.body.removeEventListener("mouseup", this.endMove);

        if(this.connection){
            this.table.element.classList.remove("tabulator-movingrow-sending");
            this.disconnectFromTables();
        }
    }
};

MoveRows.prototype.moveRow = function(row, after){
    this.toRow = row;
    this.toRowAfter = after;
};

MoveRows.prototype.moveHover = function(e){
    if(this.connection){
        this.moveHoverConnections.call(this, e);
    }else{
        this.moveHoverTable.call(this, e);
    }
};

MoveRows.prototype.moveHoverTable = function(e){
    var rowHolder = this.table.rowManager.getElement(),
    scrollTop = rowHolder.scrollTop,
    yPos = ((this.touchMove ? e.touches[0].pageY : e.pageY) - rowHolder.getBoundingClientRect().top) + scrollTop,
    scrollPos;

    this.hoverElement.style.top = (yPos - this.startY) + "px";
};


MoveRows.prototype.moveHoverConnections = function(e){
    this.hoverElement.style.left = (this.startX + (this.touchMove ? e.touches[0].pageX : e.pageX)) + "px";
    this.hoverElement.style.top = (this.startY + (this.touchMove ? e.touches[0].pageY : e.pageY)) + "px";
};


//establish connection with other tables
MoveRows.prototype.connectToTables = function(row){
    var self = this,
    connections = this.table.modules.comms.getConnections(this.connection);

    this.table.options.movableRowsSendingStart.call(this.table, connections);

    this.table.modules.comms.send(this.connection, "moveRow", "connect", {
        row:row,
    });
};


//disconnect from other tables
MoveRows.prototype.disconnectFromTables = function(){
    var self = this,
    connections = this.table.modules.comms.getConnections(this.connection);

    this.table.options.movableRowsSendingStop.call(this.table, connections);

    this.table.modules.comms.send(this.connection, "moveRow", "disconnect");
};


//accept incomming connection
MoveRows.prototype.connect = function(table, row){
    var self = this;
    if(!this.connectedTable){
        this.connectedTable = table;
        this.connectedRow = row;

        this.table.element.classList.add("tabulator-movingrow-receiving");

        self.table.rowManager.getDisplayRows().forEach(function(row){
            if(row.type === "row" && row.modules.moveRow && row.modules.moveRow.mouseup){
                row.getElement().addEventListener("mouseup", row.modules.moveRow.mouseup);
            }
        });

        self.tableRowDropEvent = self.tableRowDrop.bind(self);

        self.table.element.addEventListener("mouseup", self.tableRowDropEvent);

        this.table.options.movableRowsReceivingStart.call(this.table, row, table);

        return true;
    }else{
        console.warn("Move Row Error - Table cannot accept connection, already connected to table:", this.connectedTable);
        return false;
    }
};

//close incomming connection
MoveRows.prototype.disconnect = function(table){
    var self = this;
    if(table === this.connectedTable){
        this.connectedTable = false;
        this.connectedRow = false;

        this.table.element.classList.remove("tabulator-movingrow-receiving");

        self.table.rowManager.getDisplayRows().forEach(function(row){
            if(row.type === "row" && row.modules.moveRow && row.modules.moveRow.mouseup){
                row.getElement().removeEventListener("mouseup", row.modules.moveRow.mouseup);
            }
        });

        self.table.element.removeEventListener("mouseup", self.tableRowDropEvent);

        this.table.options.movableRowsReceivingStop.call(this.table, table);
    }else{
        console.warn("Move Row Error - trying to disconnect from non connected table")
    }
};

MoveRows.prototype.dropComplete = function(table, row, success){
    var sender = false;

    if(success){

        switch(typeof this.table.options.movableRowsSender){
            case "string":
            sender = this.senders[this.table.options.movableRowsSender];
            break;

            case "function":
            sender = this.table.options.movableRowsSender;
            break;
        }

        if(sender){
            sender.call(this, this.moving.getComponent(), row ? row.getComponent() : undefined, table)
        }else{
            if(this.table.options.movableRowsSender){
                console.warn("Mover Row Error - no matching sender found:", this.table.options.movableRowsSender);
            }
        }

        this.table.options.movableRowsSent.call(this.table, this.moving.getComponent(), row ? row.getComponent() : undefined, table);

    }else{
        this.table.options.movableRowsSentFailed.call(this.table, this.moving.getComponent(), row ? row.getComponent() : undefined, table);
    }

    this.endMove();

};


MoveRows.prototype.tableRowDrop = function(e, row){
    var receiver = false,
    success = false;

    e.stopImmediatePropagation();

    switch(typeof this.table.options.movableRowsReceiver){
        case "string":
        receiver = this.receivers[this.table.options.movableRowsReceiver];
        break;

        case "function":
        receiver = this.table.options.movableRowsReceiver;
        break;
    }

    if(receiver){
        success = receiver.call(this, this.connectedRow.getComponent(), row ? row.getComponent() : undefined, this.connectedTable)
    }else{
        console.warn("Mover Row Error - no matching receiver found:", this.table.options.movableRowsReceiver)
    }

    if(success){
        this.table.options.movableRowsReceived.call(this.table, this.connectedRow.getComponent(), row ? row.getComponent() : undefined, this.connectedTable);
    }else{
        this.table.options.movableRowsReceivedFailed.call(this.table, this.connectedRow.getComponent(), row ? row.getComponent() : undefined, this.connectedTable);
    }

    this.table.modules.comms.send(this.connectedTable, "moveRow", "dropcomplete", {
        row:row,
        success:success,
    });
};



MoveRows.prototype.receivers = {
    insert:function(fromRow, toRow, fromTable){
        this.table.addRow(fromRow.getData(), undefined, toRow);
        return true;
    },

    add:function(fromRow, toRow, fromTable){
        this.table.addRow(fromRow.getData());
        return true;
    },

    update:function(fromRow, toRow, fromTable){
        if(toRow){
            toRow.update(fromRow.getData());
            return true;
        }

        return false;
    },

    replace:function(fromRow, toRow, fromTable){
        if(toRow){
            this.table.addRow(fromRow.getData(), undefined, toRow);
            toRow.delete();
            return true;
        }

        return false;
    },
};

MoveRows.prototype.senders = {
    delete:function(fromRow, toRow, toTable){
        fromRow.delete();
    }
};


MoveRows.prototype.commsReceived = function(table, action, data){
    switch(action){
        case "connect":
        return this.connect(table, data.row);
        break;

        case "disconnect":
        return this.disconnect(table);
        break;

        case "dropcomplete":
        return this.dropComplete(table, data.row, data.success);
        break;
    }
};


Tabulator.prototype.registerModule("moveRow", MoveRows);