# plugins/cell.js

    /** ====================================================================
     * jsPDF Cell plugin
     * Copyright (c) 2013 Youssef Beddad, youssef.beddad@gmail.com
     *               2013 Eduardo Menezes de Morais, eduardo.morais@usp.br
     *               2013 Lee Driscoll, https://github.com/lsdriscoll
     *               2014 Juan Pablo Gaviria, https://github.com/juanpgaviria
     *               2014 James Hall, james@parall.ax
     *               2014 Diego Casorran, https://github.com/diegocr
     *
     * Permission is hereby granted, free of charge, to any person obtaining
     * a copy of this software and associated documentation files (the
     * "Software"), to deal in the Software without restriction, including
     * without limitation the rights to use, copy, modify, merge, publish,
     * distribute, sublicense, and/or sell copies of the Software, and to
     * permit persons to whom the Software is furnished to do so, subject to
     * the following conditions:
     *
     * The above copyright notice and this permission notice shall be
     * included in all copies or substantial portions of the Software.
     *
     * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
     * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
     * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
     * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
     * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
     * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
     * ====================================================================
     */

    (function (jsPDFAPI) {
        'use strict';
        /*jslint browser:true */
        /*global document: false, jsPDF */

        var fontName,
            fontSize,
            fontStyle,
            padding = 3,
            margin = 13,
            headerFunction,
            lastCellPos = { x: undefined, y: undefined, w: undefined, h: undefined, ln: undefined },
            pages = 1,
            setLastCellPosition = function (x, y, w, h, ln) {
                lastCellPos = { 'x': x, 'y': y, 'w': w, 'h': h, 'ln': ln };
            },
            getLastCellPosition = function () {
                return lastCellPos;
            },
            NO_MARGINS = {left:0, top:0, bottom: 0};

        jsPDFAPI.setHeaderFunction = function (func) {
            headerFunction = func;
        };

        jsPDFAPI.getTextDimensions = function (txt) {
            fontName = this.internal.getFont().fontName;
            fontSize = this.table_font_size || this.internal.getFontSize();
            fontStyle = this.internal.getFont().fontStyle;
            // 1 pixel = 0.264583 mm and 1 mm = 72/25.4 point
            var px2pt = 0.264583 * 72 / 25.4,
                dimensions,
                text;

            text = document.createElement('font');
            text.id = "jsPDFCell";

            try {
                text.style.fontStyle = fontStyle;
            } catch(e) {
                text.style.fontWeight = fontStyle;
            }

            text.style.fontName = fontName;
            text.style.fontSize = fontSize + 'pt';
            try {
                text.textContent = txt;
            } catch(e) {
                text.innerText = txt;
            }

            document.body.appendChild(text);

            dimensions = { w: (text.offsetWidth + 1) * px2pt, h: (text.offsetHeight + 1) * px2pt};

            document.body.removeChild(text);

            return dimensions;
        };

        jsPDFAPI.cellAddPage = function () {
            var margins = this.margins || NO_MARGINS;

            this.addPage();

            setLastCellPosition(margins.left, margins.top, undefined, undefined);
            //setLastCellPosition(undefined, undefined, undefined, undefined, undefined);
            pages += 1;
        };

        jsPDFAPI.cellInitialize = function () {
            lastCellPos = { x: undefined, y: undefined, w: undefined, h: undefined, ln: undefined };
            pages = 1;
        };

        jsPDFAPI.cell = function (x, y, w, h, txt, ln, align) {
            var curCell = getLastCellPosition();
            var pgAdded = false;

            // If this is not the first cell, we must change its position
            if (curCell.ln !== undefined) {
                if (curCell.ln === ln) {
                    //Same line
                    x = curCell.x + curCell.w;
                    y = curCell.y;
                } else {
                    //New line
                    var margins = this.margins || NO_MARGINS;
                    if ((curCell.y + curCell.h + h + margin) >= this.internal.pageSize.height - margins.bottom) {
                        this.cellAddPage();
                        pgAdded = true;
                        if (this.printHeaders && this.tableHeaderRow) {
                            this.printHeaderRow(ln, true);
                        }
                    }
                    //We ignore the passed y: the lines may have different heights
                    y = (getLastCellPosition().y + getLastCellPosition().h);
                    if (pgAdded) y = margin + 10;
                }
            }

            if (txt[0] !== undefined) {
                if (this.printingHeaderRow) {
                    this.rect(x, y, w, h, 'FD');
                } else {
                    this.rect(x, y, w, h);
                }
                if (align === 'right') {
                    if (!(txt instanceof Array)) {
                        txt = [txt];
                    }
                    for (var i = 0; i < txt.length; i++) {
                        var currentLine = txt[i];
                        var textSize = this.getStringUnitWidth(currentLine) * this.internal.getFontSize();
                        this.text(currentLine, x + w - textSize - padding, y + this.internal.getLineHeight()*(i+1));
                    }
                } else {
                    this.text(txt, x + padding, y + this.internal.getLineHeight());
                }
            }
            setLastCellPosition(x, y, w, h, ln);
            return this;
        };

        /**
         * Return the maximum value from an array
         * @param array
         * @param comparisonFn
         * @returns {*}
         */
        jsPDFAPI.arrayMax = function (array, comparisonFn) {
            var max = array[0],
                i,
                ln,
                item;

            for (i = 0, ln = array.length; i < ln; i += 1) {
                item = array[i];

                if (comparisonFn) {
                    if (comparisonFn(max, item) === -1) {
                        max = item;
                    }
                } else {
                    if (item > max) {
                        max = item;
                    }
                }
            }

            return max;
        };

        /**
         * Create a table from a set of data.
         * @param {Integer} [x] : left-position for top-left corner of table
         * @param {Integer} [y] top-position for top-left corner of table
         * @param {Object[]} [data] As array of objects containing key-value pairs corresponding to a row of data.
         * @param {String[]} [headers] Omit or null to auto-generate headers at a performance cost

         * @param {Object} [config.printHeaders] True to print column headers at the top of every page
         * @param {Object} [config.autoSize] True to dynamically set the column widths to match the widest cell value
         * @param {Object} [config.margins] margin values for left, top, bottom, and width
         * @param {Object} [config.fontSize] Integer fontSize to use (optional)
         */

        jsPDFAPI.table = function (x,y, data, headers, config) {
            if (!data) {
                throw 'No data for PDF table';
            }

            var headerNames = [],
                headerPrompts = [],
                header,
                i,
                ln,
                cln,
                columnMatrix = {},
                columnWidths = {},
                columnData,
                column,
                columnMinWidths = [],
                j,
                tableHeaderConfigs = [],
                model,
                jln,
                func,

            //set up defaults. If a value is provided in config, defaults will be overwritten:
               autoSize        = false,
               printHeaders    = true,
               fontSize        = 12,
               margins         = NO_MARGINS;

               margins.width = this.internal.pageSize.width;

            if (config) {
            //override config defaults if the user has specified non-default behavior:
                if(config.autoSize === true) {
                    autoSize = true;
                }
                if(config.printHeaders === false) {
                    printHeaders = false;
                }
                if(config.fontSize){
                    fontSize = config.fontSize;
                }
                if (config.css && typeof(config.css['font-size']) !== "undefined") {
                    fontSize = config.css['font-size'] * 16;
                }
                if(config.margins){
                    margins = config.margins;
                }
            }

            /**
             * @property {Number} lnMod
             * Keep track of the current line number modifier used when creating cells
             */
            this.lnMod = 0;
            lastCellPos = { x: undefined, y: undefined, w: undefined, h: undefined, ln: undefined },
            pages = 1;

            this.printHeaders = printHeaders;
            this.margins = margins;
            this.setFontSize(fontSize);
            this.table_font_size = fontSize;

            // Set header values
            if (headers === undefined || (headers === null)) {
                // No headers defined so we derive from data
                headerNames = Object.keys(data[0]);

            } else if (headers[0] && (typeof headers[0] !== 'string')) {
                var px2pt = 0.264583 * 72 / 25.4;

                // Split header configs into names and prompts
                for (i = 0, ln = headers.length; i < ln; i += 1) {
                    header = headers[i];
                    headerNames.push(header.name);
                    headerPrompts.push(header.prompt);
                    columnWidths[header.name] = header.width *px2pt;
                }

            } else {
                headerNames = headers;
            }

            if (autoSize) {
                // Create a matrix of columns e.g., {column_title: [row1_Record, row2_Record]}
                func = function (rec) {
                    return rec[header];
                };

                for (i = 0, ln = headerNames.length; i < ln; i += 1) {
                    header = headerNames[i];

                    columnMatrix[header] = data.map(
                        func
                    );

                    // get header width
                    columnMinWidths.push(this.getTextDimensions(headerPrompts[i] || header).w);
                    column = columnMatrix[header];

                    // get cell widths
                    for (j = 0, cln = column.length; j < cln; j += 1) {
                        columnData = column[j];
                        columnMinWidths.push(this.getTextDimensions(columnData).w);
                    }

                    // get final column width
                    columnWidths[header] = jsPDFAPI.arrayMax(columnMinWidths);

                    //have to reset
                    columnMinWidths = [];
                }
            }

            // -- Construct the table

            if (printHeaders) {
                var lineHeight = this.calculateLineHeight(headerNames, columnWidths, headerPrompts.length?headerPrompts:headerNames);

                // Construct the header row
                for (i = 0, ln = headerNames.length; i < ln; i += 1) {
                    header = headerNames[i];
                    tableHeaderConfigs.push([x, y, columnWidths[header], lineHeight, String(headerPrompts.length ? headerPrompts[i] : header)]);
                }

                // Store the table header config
                this.setTableHeaderRow(tableHeaderConfigs);

                // Print the header for the start of the table
                this.printHeaderRow(1, false);
            }

            // Construct the data rows
            for (i = 0, ln = data.length; i < ln; i += 1) {
                var lineHeight;
                model = data[i];
                lineHeight = this.calculateLineHeight(headerNames, columnWidths, model);

                for (j = 0, jln = headerNames.length; j < jln; j += 1) {
                    header = headerNames[j];
                    this.cell(x, y, columnWidths[header], lineHeight, model[header], i + 2, header.align);
                }
            }
            this.lastCellPos = lastCellPos;
            this.table_x = x;
            this.table_y = y;
            return this;
        };
        /**
         * Calculate the height for containing the highest column
         * @param {String[]} headerNames is the header, used as keys to the data
         * @param {Integer[]} columnWidths is size of each column
         * @param {Object[]} model is the line of data we want to calculate the height of
         */
        jsPDFAPI.calculateLineHeight = function (headerNames, columnWidths, model) {
            var header, lineHeight = 0;
            for (var j = 0; j < headerNames.length; j++) {
                header = headerNames[j];
                model[header] = this.splitTextToSize(String(model[header]), columnWidths[header] - padding);
                var h = this.internal.getLineHeight() * model[header].length + padding;
                if (h > lineHeight)
                    lineHeight = h;
            }
            return lineHeight;
        };

        /**
         * Store the config for outputting a table header
         * @param {Object[]} config
         * An array of cell configs that would define a header row: Each config matches the config used by jsPDFAPI.cell
         * except the ln parameter is excluded
         */
        jsPDFAPI.setTableHeaderRow = function (config) {
            this.tableHeaderRow = config;
        };

        /**
         * Output the store header row
         * @param lineNumber The line number to output the header at
         */
        jsPDFAPI.printHeaderRow = function (lineNumber, new_page) {
            if (!this.tableHeaderRow) {
                throw 'Property tableHeaderRow does not exist.';
            }

            var tableHeaderCell,
                tmpArray,
                i,
                ln;

            this.printingHeaderRow = true;
            if (headerFunction !== undefined) {
                var position = headerFunction(this, pages);
                setLastCellPosition(position[0], position[1], position[2], position[3], -1);
            }
            this.setFontStyle('bold');
            var tempHeaderConf = [];
            for (i = 0, ln = this.tableHeaderRow.length; i < ln; i += 1) {
                this.setFillColor(200,200,200);

                tableHeaderCell = this.tableHeaderRow[i];
                if (new_page) {
                    this.margins.top = margin;
                    tableHeaderCell[1] = this.margins && this.margins.top || 0;
                    tempHeaderConf.push(tableHeaderCell);
                }
                tmpArray = [].concat(tableHeaderCell);
                this.cell.apply(this, tmpArray.concat(lineNumber));
            }
            if (tempHeaderConf.length > 0){
                this.setTableHeaderRow(tempHeaderConf);
            }
            this.setFontStyle('normal');
            this.printingHeaderRow = false;
        };

    })(jsPDF.API);