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From: Dominik Csapak <d.csapak@proxmox.com>
To: pve-devel@lists.proxmox.com
Subject: [pve-devel] [PATCH widget-toolkit v7 1/3] add tag related helpers
Date: Tue, 21 Jun 2022 11:19:54 +0200	[thread overview]
Message-ID: <20220621092012.1776825-7-d.csapak@proxmox.com> (raw)
In-Reply-To: <20220621092012.1776825-1-d.csapak@proxmox.com>

helpers to
* generate a color from a string consistently
* generate a html tag for a tag
* related css classes

contrast is calculated according to SAPC draft:
https://github.com/Myndex/SAPC-APCA

which is likely to become a w3c guideline in the future and seems
to be a better algorithm for this

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
---
 src/Utils.js         | 90 ++++++++++++++++++++++++++++++++++++++++++++
 src/css/ext6-pmx.css | 45 ++++++++++++++++++++++
 2 files changed, 135 insertions(+)

diff --git a/src/Utils.js b/src/Utils.js
index 6a03057..eb13838 100644
--- a/src/Utils.js
+++ b/src/Utils.js
@@ -1272,6 +1272,96 @@ utilities: {
 	    .map(val => val.charCodeAt(0)),
 	);
     },
+
+    stringToRGB: function(string) {
+	let hash = 0;
+	if (!string) {
+	    return hash;
+	}
+	string += 'prox'; // give short strings more variance
+	for (let i = 0; i < string.length; i++) {
+	    hash = string.charCodeAt(i) + ((hash << 5) - hash);
+	    hash = hash & hash; // to int
+	}
+
+	let alpha = 0.7; // make the color a bit brighter
+	let bg = 255; // assume white background
+
+	return [
+	    (hash & 255)*alpha + bg*(1-alpha),
+	    ((hash >> 8) & 255)*alpha + bg*(1-alpha),
+	    ((hash >> 16) & 255)*alpha + bg*(1-alpha),
+	];
+    },
+
+    rgbToCss: function(rgb) {
+	return `rgb(${rgb[0]}, ${rgb[1]}, ${rgb[2]})`;
+    },
+
+    rgbToHex: function(rgb) {
+	let r = Math.round(rgb[0]).toString(16);
+	let g = Math.round(rgb[1]).toString(16);
+	let b = Math.round(rgb[2]).toString(16);
+	return `${r}${g}${b}`;
+    },
+
+    hexToRGB: function(hex) {
+	if (!hex) {
+	    return undefined;
+	}
+	if (hex.length === 7) {
+	    hex = hex.slice(1);
+	}
+	let r = parseInt(hex.slice(0, 2), 16);
+	let g = parseInt(hex.slice(2, 4), 16);
+	let b = parseInt(hex.slice(4, 6), 16);
+	return [r, g, b];
+    },
+
+    // optimized & simplified SAPC function
+    // https://github.com/Myndex/SAPC-APCA
+    getTextContrastClass: function(rgb) {
+	    const blkThrs = 0.022;
+	    const blkClmp = 1.414;
+
+	    // linearize & gamma correction
+	    let r = (rgb[0]/255)**2.4;
+	    let g = (rgb[1]/255)**2.4;
+	    let b = (rgb[2]/255)**2.4;
+
+	    // relative luminance sRGB
+	    let bg = r*0.2126729 + g*0.7151522 + b*0.0721750;
+
+	    // black clamp
+	    bg = bg > blkThrs ? bg : bg + (blkThrs - bg) ** blkClmp;
+
+	    // SAPC with white text
+	    let contrastLight = bg ** 0.65 - 1;
+	    // SAPC with black text
+	    let contrastDark = bg ** 0.56 - 0.046134502;
+
+	    if (Math.abs(contrastLight) >= Math.abs(contrastDark)) {
+		return 'light';
+	    } else {
+		return 'dark';
+	    }
+    },
+
+    getTagElement: function(string, color_overrides) {
+	let rgb = color_overrides?.[string] || Proxmox.Utils.stringToRGB(string);
+	let bgcolor = Proxmox.Utils.rgbToCss(rgb);
+	let style = `background-color: ${bgcolor};`;
+	let cls;
+	if (rgb.length > 3) {
+	    let fgcolor = Proxmox.Utils.rgbToCss([rgb[3], rgb[4], rgb[5]]);
+	    style += `color: ${fgcolor}`;
+	    cls = "proxmox-tag-dark";
+	} else {
+	    let txtCls = Proxmox.Utils.getTextContrastClass(rgb);
+	    cls = `proxmox-tag-${txtCls}`;
+	}
+	return `<span class="${cls}" style="${style}">${string}</span>`;
+    },
 },
 
     singleton: true,
diff --git a/src/css/ext6-pmx.css b/src/css/ext6-pmx.css
index 886e24a..3e0f04f 100644
--- a/src/css/ext6-pmx.css
+++ b/src/css/ext6-pmx.css
@@ -6,6 +6,51 @@
     background-color: LightYellow;
 }
 
+.proxmox-tags-full .proxmox-tag-light,
+.proxmox-tags-full .proxmox-tag-dark {
+    border-radius: 3px;
+    padding: 1px 6px;
+    margin: 0px 1px;
+}
+
+.proxmox-tags-circle .proxmox-tag-light,
+.proxmox-tags-circle .proxmox-tag-dark {
+    margin: 0px 1px;
+    position: relative;
+    top: 2px;
+    border-radius: 6px;
+    height: 12px;
+    width: 12px;
+    display: inline-block;
+    color: transparent !important;
+    overflow: hidden;
+}
+
+.proxmox-tags-none .proxmox-tag-light,
+.proxmox-tags-none .proxmox-tag-dark {
+    display: none;
+}
+
+.proxmox-tags-dense .proxmox-tag-light,
+.proxmox-tags-dense .proxmox-tag-dark {
+    width: 6px;
+    margin-right: 1px;
+    display: inline-block;
+    color: transparent !important;
+    overflow: hidden;
+    vertical-align: bottom;
+}
+
+.proxmox-tags-full .proxmox-tag-light {
+    color: #fff;
+    background-color: #383838;
+}
+
+.proxmox-tags-full .proxmox-tag-dark {
+    color: #000;
+    background-color: #f0f0f0;
+}
+
 .x-mask-msg-text {
     text-align: center;
 }
-- 
2.30.2





  parent reply	other threads:[~2022-06-21  9:20 UTC|newest]

Thread overview: 41+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-06-21  9:19 [pve-devel] [PATCH common/cluster/qemu/container/wt/manager v7] add tags to ui Dominik Csapak
2022-06-21  9:19 ` [pve-devel] [PATCH common v7 1/2] JSONSchema: refactor tag regex Dominik Csapak
2022-09-20 11:37   ` [pve-devel] applied: " Thomas Lamprecht
2022-06-21  9:19 ` [pve-devel] [PATCH common v7 2/2] JSONSchema: pve-tag: add syntax for 'admin' tags Dominik Csapak
2022-06-21  9:19 ` [pve-devel] [PATCH cluster v7 1/3] add CFS_IPC_GET_GUEST_CONFIG_PROPERTIES method Dominik Csapak
2022-06-21  9:19 ` [pve-devel] [PATCH cluster v7 2/3] Cluster: add get_guest_config_properties Dominik Csapak
2022-06-21  9:19 ` [pve-devel] [PATCH cluster v7 3/3] datacenter.cfg: add option for tag-style Dominik Csapak
2022-06-21  9:19 ` Dominik Csapak [this message]
2022-09-14 14:15   ` [pve-devel] [PATCH widget-toolkit v7 1/3] add tag related helpers Aaron Lauterer
2022-06-21  9:19 ` [pve-devel] [PATCH widget-toolkit v7 2/3] add class for 'admin' tags Dominik Csapak
2022-06-21  9:19 ` [pve-devel] [PATCH widget-toolkit v7 3/3] Toolkit: add override for Ext.dd.DragDropManager Dominik Csapak
2022-06-21  9:19 ` [pve-devel] [PATCH qemu-server v7 1/1] api: update: check 'admin' tags privileges Dominik Csapak
2022-09-14 14:15   ` Aaron Lauterer
2022-09-15 11:46     ` Dominik Csapak
2022-06-21  9:19 ` [pve-devel] [PATCH container v7 1/1] check_ct_modify_config_perm: " Dominik Csapak
2022-06-21  9:19 ` [pve-devel] [PATCH manager v7 01/14] api: /cluster/resources: add tags to returned properties Dominik Csapak
2022-09-14 14:15   ` Aaron Lauterer
2022-06-21  9:20 ` [pve-devel] [PATCH manager v7 02/14] api: /version: add 'tag-style' Dominik Csapak
2022-06-21  9:20 ` [pve-devel] [PATCH manager v7 03/14] ui: parse and save tag color overrides from /version Dominik Csapak
2022-06-21  9:20 ` [pve-devel] [PATCH manager v7 04/14] ui: tree/ResourceTree: collect tags on update Dominik Csapak
2022-06-21  9:20 ` [pve-devel] [PATCH manager v7 05/14] ui: add form/TagColorGrid Dominik Csapak
2022-09-14 14:15   ` Aaron Lauterer
2022-06-21  9:20 ` [pve-devel] [PATCH manager v7 06/14] ui: dc/OptionView: add editors for tag settings Dominik Csapak
2022-06-21  9:20 ` [pve-devel] [PATCH manager v7 07/14] ui: add form/Tag Dominik Csapak
2022-09-14 14:15   ` Aaron Lauterer
2022-09-14 14:36     ` Aaron Lauterer
2022-06-21  9:20 ` [pve-devel] [PATCH manager v7 08/14] ui: add form/TagEdit.js Dominik Csapak
2022-09-14 14:15   ` Aaron Lauterer
2022-06-21  9:20 ` [pve-devel] [PATCH manager v7 09/14] ui: {lxc, qemu}/Config: show Tags and make them editable Dominik Csapak
2022-06-21  9:20 ` [pve-devel] [PATCH manager v7 10/14] ui: tree/ResourceTree: show Tags in tree Dominik Csapak
2022-09-14 14:15   ` Aaron Lauterer
2022-09-15 11:54     ` Dominik Csapak
2022-06-21  9:20 ` [pve-devel] [PATCH manager v7 11/14] ui: form/GlobalSearchField: display tags and allow to search for them Dominik Csapak
2022-06-21  9:20 ` [pve-devel] [PATCH manager v7 12/14] ui: form/Tag: add 'admin-tag' class to admin tags Dominik Csapak
2022-06-21  9:20 ` [pve-devel] [PATCH manager v7 13/14] ui: ResourceGrid: render tags Dominik Csapak
2022-06-21  9:20 ` [pve-devel] [PATCH manager v7 14/14] ui: form/Tag(Edit): add drag & drop when editing tags Dominik Csapak
2022-09-14 14:15   ` Aaron Lauterer
2022-09-15 11:56     ` Dominik Csapak
2022-09-14 14:34 ` [pve-devel] [PATCH common/cluster/qemu/container/wt/manager v7] add tags to ui Aaron Lauterer
2022-09-16  7:19 ` Thomas Lamprecht
2022-09-16  7:50   ` Dominik Csapak

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