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Diffstat (limited to 'devtools/client/memory/components/tree-map/color-coarse-type.js')
-rw-r--r-- | devtools/client/memory/components/tree-map/color-coarse-type.js | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/devtools/client/memory/components/tree-map/color-coarse-type.js b/devtools/client/memory/components/tree-map/color-coarse-type.js new file mode 100644 index 000000000..5f033ea26 --- /dev/null +++ b/devtools/client/memory/components/tree-map/color-coarse-type.js @@ -0,0 +1,70 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this file, + * You can obtain one at http://mozilla.org/MPL/2.0/. */ + +"use strict"; + +/** + * Color the boxes in the treemap + */ + +const TYPES = [ "objects", "other", "strings", "scripts" ]; + +// The factors determine how much the hue shifts +const TYPE_FACTOR = TYPES.length * 3; +const DEPTH_FACTOR = -10; +const H = 0.5; +const S = 0.6; +const L = 0.9; + +/** + * Recursively find the index of the coarse type of a node + * + * @param {Object} node + * d3 treemap + * @return {Integer} + * index + */ +function findCoarseTypeIndex(node) { + let index = TYPES.indexOf(node.name); + + if (node.parent) { + return index === -1 ? findCoarseTypeIndex(node.parent) : index; + } + + return TYPES.indexOf("other"); +} + +/** + * Decide a color value for depth to be used in the HSL computation + * + * @param {Object} node + * @return {Number} + */ +function depthColorFactor(node) { + return Math.min(1, node.depth / DEPTH_FACTOR); +} + +/** + * Decide a color value for type to be used in the HSL computation + * + * @param {Object} node + * @return {Number} + */ +function typeColorFactor(node) { + return findCoarseTypeIndex(node) / TYPE_FACTOR; +} + +/** + * Color a node + * + * @param {Object} node + * @return {Array} HSL values ranged 0-1 + */ +module.exports = function colorCoarseType(node) { + let h = Math.min(1, H + typeColorFactor(node)); + let s = Math.min(1, S); + let l = Math.min(1, L + depthColorFactor(node)); + + return [h, s, l]; +}; |