jsmind/es6/jsmind.screenshot.js.map

jsMind is a pure javascript library for mindmap, it base on html5 canvas. jsMind was released under BSD license, you can embed it in any project, if only you observe the license.

{"version":3,"file":"jsmind.screenshot.js","sources":["../src/plugins/jsmind.screenshot.js"],"sourcesContent":["/**\n * @license BSD\n * @copyright 2014-2025 hizzgdev@163.com\n *\n * Project Home:\n *   https://github.com/hizzgdev/jsmind/\n */\n\nimport jsMind from 'jsmind';\nimport domtoimage from 'dom-to-image';\n\nif (!jsMind) {\n    throw new Error('jsMind is not defined');\n}\n\nif (!domtoimage) {\n    throw new Error('dom-to-image is required');\n}\n\nconst $ = jsMind.$;\n\nconst DEFAULT_OPTIONS = {\n    filename: null,\n    watermark: {\n        left: $.w.location,\n        right: 'https://github.com/hizzgdev/jsmind',\n    },\n    background: 'transparent',\n};\n\nclass JmScreenshot {\n    constructor(jm, options) {\n        var opts = {};\n        jsMind.util.json.merge(opts, DEFAULT_OPTIONS);\n        jsMind.util.json.merge(opts, options);\n\n        this.version = '0.2.0';\n        this.jm = jm;\n        this.options = opts;\n        this.dpr = jm.view.device_pixel_ratio;\n    }\n\n    shoot() {\n        let c = this.create_canvas();\n        let ctx = c.getContext('2d');\n        ctx.scale(this.dpr, this.dpr);\n        Promise.resolve(ctx)\n            .then(() => this.draw_background(ctx))\n            .then(() => this.draw_lines(ctx))\n            .then(() => this.draw_nodes(ctx))\n            .then(() => this.draw_watermark(c, ctx))\n            .then(() => this.download(c))\n            .then(() => this.clear(c));\n    }\n\n    create_canvas() {\n        let c = $.c('canvas');\n        const w = this.jm.view.size.w;\n        const h = this.jm.view.size.h;\n        c.width = w * this.dpr;\n        c.height = h * this.dpr;\n        c.style.width = w + 'px';\n        c.style.height = h + 'px';\n\n        c.style.visibility = 'hidden';\n        this.jm.view.e_panel.appendChild(c);\n        return c;\n    }\n\n    clear(c) {\n        c.parentNode.removeChild(c);\n    }\n\n    draw_background(ctx) {\n        return new Promise(\n            function (resolve, _) {\n                const bg = this.options.background;\n                if (!!bg && bg !== 'transparent') {\n                    ctx.fillStyle = this.options.background;\n                    ctx.fillRect(0, 0, this.jm.view.size.w, this.jm.view.size.h);\n                }\n                resolve(ctx);\n            }.bind(this)\n        );\n    }\n\n    draw_lines(ctx) {\n        return new Promise(\n            function (resolve, _) {\n                this.jm.view.graph.copy_to(ctx, function () {\n                    resolve(ctx);\n                });\n            }.bind(this)\n        );\n    }\n\n    draw_nodes(ctx) {\n        return domtoimage\n            .toSvg(this.jm.view.e_nodes, { style: { zoom: 1 } })\n            .then(this.load_image)\n            .then(function (img) {\n                ctx.drawImage(img, 0, 0);\n                return ctx;\n            });\n    }\n\n    draw_watermark(c, ctx) {\n        ctx.textBaseline = 'bottom';\n        ctx.fillStyle = '#000';\n        ctx.font = '11px Verdana,Arial,Helvetica,sans-serif';\n        if (!!this.options.watermark.left) {\n            ctx.textAlign = 'left';\n            ctx.fillText(this.options.watermark.left, 5.5, c.height - 2.5);\n        }\n        if (!!this.options.watermark.right) {\n            ctx.textAlign = 'right';\n            ctx.fillText(this.options.watermark.right, c.width - 5.5, c.height - 2.5);\n        }\n        return ctx;\n    }\n\n    load_image(url) {\n        return new Promise(function (resolve, reject) {\n            let img = new Image();\n            img.onload = function () {\n                resolve(img);\n            };\n            img.onerror = reject;\n            img.src = url;\n        });\n    }\n\n    download(c) {\n        var name = (this.options.filename || this.jm.mind.name) + '.png';\n\n        if (navigator.msSaveBlob && !!c.msToBlob) {\n            var blob = c.msToBlob();\n            navigator.msSaveBlob(blob, name);\n        } else {\n            var blob_url = c.toDataURL();\n            var anchor = $.c('a');\n            if ('download' in anchor) {\n                anchor.style.visibility = 'hidden';\n                anchor.href = blob_url;\n                anchor.download = name;\n                $.d.body.appendChild(anchor);\n                var evt = $.d.createEvent('MouseEvents');\n                evt.initEvent('click', true, true);\n                anchor.dispatchEvent(evt);\n                $.d.body.removeChild(anchor);\n            } else {\n                location.href = blob_url;\n            }\n        }\n    }\n}\n\nlet screenshot_plugin = new jsMind.plugin('screenshot', function (jm, options) {\n    var jmss = new JmScreenshot(jm, options);\n    jm.screenshot = jmss;\n    jm.shoot = function () {\n        jmss.shoot();\n    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