我正在尝试开发一个简单的chrome扩展。 pageAction的默认图标应显示在具有特定网址(http://www.example.com/*
)的网页上。
有两个文件
manifest.json
{
"manifest_version": 2,
"name": "name",
"description": "description",
"version": "1.0",
"background": {
"scripts": [
"background.js"
],
"persistent": false
},
"page_action": {
"default_icon" : "images/icons/19.png"
},
"permissions": [
"declarativeContent"
]
}
background.js
chrome.runtime.onInstalled.addListener(function () {
chrome.declarativeContent.onPageChanged.removeRules(undefined, function () {
chrome.declarativeContent.onPageChanged.addRules([
{
// rule1
conditions : [
new chrome.declarativeContent.PageStateMatcher({
pageUrl : {urlPrefix : 'http://www.example.com/'}
})
],
actions : [
new chrome.declarativeContent.ShowPageAction()
]
},
{
// rule2
conditions : [
new chrome.declarativeContent.PageStateMatcher({
pageUrl : {queryContains : 'q1=green'}
})
],
actions : [
new chrome.declarativeContent.SetIcon({
path : {"19" : "images/icons/green.png"}
})
]
}
]);
});
});
rule1
应该显示pageAction的图标,rule2
应该在包含http://www.example.com/?q1=green
但在安装扩展程序期间,事情就会出现:
Error in response to events.removeRules: Error: Invalid value for argument 1. Property '.0': Value does not match any valid type choices.
答案 0 :(得分:7)
我深深挖掘了这个错误,似乎文档没有很好地反映出未使用path
参数的事实。这肯定是一个错误,跟踪here。
目前,为了解决此问题,您需要在调用SetIcon
之前加载图像并将其转换为ImageData格式。
// Takes a local path to intended 19x19 icon
// and passes a correct SetIcon action to the callback
function createSetIconAction(path, callback) {
var canvas = document.createElement("canvas");
var ctx = canvas.getContext("2d");
var image = new Image();
image.onload = function() {
ctx.drawImage(image,0,0,19,19);
var imageData = ctx.getImageData(0,0,19,19);
var action = new chrome.declarativeContent.SetIcon({imageData: imageData});
callback(action);
}
image.src = chrome.runtime.getURL(path);
}
chrome.declarativeContent.onPageChanged.removeRules(undefined, function () {
createSetIconAction("images/icons/green.png", function(setIconAction) {
chrome.declarativeContent.onPageChanged.addRules([
/* rule1, */
{
conditions : [
new chrome.declarativeContent.PageStateMatcher({
pageUrl : {queryContains : 'q1=green'}
})
],
actions : [ setIconAction ]
}
]);
});
});
如果需要,可以将其推广为支持高DPI图标(19 + 38):
function createSetIconAction(path19, path38, callback) {
var canvas = document.createElement("canvas");
var ctx = canvas.getContext("2d");
var image19 = new Image();
image19.onload = function() {
ctx.drawImage(image,0,0,19,19);
var imageData19 = ctx.getImageData(0,0,19,19);
var image38 = new Image();
image38.onload = function() {
ctx.drawImage(image,0,0,38,38);
var imageData38 = ctx.getImageData(0,0,38,38);
var action = new chrome.declarativeContent.SetIcon({
imageData: {19: imageData19, 38: imageData38}
});
callback(action);
}
image38.src = chrome.runtime.getURL(path38);
}
image19.src = chrome.runtime.getURL(path19);
}
答案 1 :(得分:1)
实际上,您可以使用new chrome.declarativeContent.SetIcon({ path:'yourPath.png' })
,
无需指定大小path: {"19": "images/icons/green.png"}
,其默认值为:16
使用declarativeContent.SetIcon
需要注意的一个问题,它实际上是一个错误。
实际使用path
最终会自动转换为ImageData。
查看屏幕截图:
declarativeContent.SetIcon
错误的根本原因是:它是一个异步API,但同时没有异步回调。您唯一可以做的就是等待。
const action = new chrome.declarativeContent.SetIcon({ path: 'assets/icon.png' });
console.log(action.imageData); // => undefined
查看屏幕截图:
// invalid
new chrome.declarativeContent.SetIcon({ path: 'assets/icon.png' }, action => console.log(action));
等待一段时间:
const action = new chrome.declarativeContent.SetIcon({ path: 'assets/icon.png' });
setTimeout(() => {
console.log(action.imageData); // {16: ArrayBuffer(1060)}
}, 5);
查看屏幕截图:
当您了解SetIcon
错误的原因时,该问题将得到很好的解决。
您只需要在事件中放入addRules
的操作即可。
已安装事件
const rule2 = { id: 'hideAction', conditions: [...], actions: [new chrome.declarativeContent.SetIcon({ path: 'assets/icon.png' })]};
chrome.runtime.onInstalled.addListener(() => {
chrome.declarativeContent.onPageChanged.removeRules(undefined, () => {
chrome.declarativeContent.onPageChanged.addRules([rule2]);
});
});
pageAction.onClicked
const rule2 = { id: 'hideAction', conditions: [...], actions: [new chrome.declarativeContent.SetIcon({ path: 'assets/icon.png' })]};
chrome.pageAction.onClicked.addListener(() => {
if (condition) {
chrome.declarativeContent.onPageChanged.removeRules(['hideAction']);
} else {
chrome.declarativeContent.onPageChanged.addRules([rule2]);
}
});
有一些相关信息:
SetIcon
源代码
declarativeContent.SetIcon = function (parameters) {
// TODO(devlin): This is very, very wrong. setIcon() is potentially
// asynchronous (in the case of a path being specified), which means this
// becomes an "asynchronous constructor". Errors can be thrown *after* the
// `new declarativeContent.SetIcon(...)` call, and in the async cases,
// this wouldn't work when we immediately add the action via an API call
// (e.g.,
// chrome.declarativeContent.onPageChange.addRules(
// [{conditions: ..., actions: [ new SetIcon(...) ]}]);
// ). Some of this is tracked in http://crbug.com/415315.
setIcon(
parameters,
$Function.bind(function (data) {
// Fake calling the original function as a constructor.
$Object.setPrototypeOf(this, nativeSetIcon.prototype);
$Function.apply(nativeSetIcon, this, [data]);
}, this)
);
};
有关问题的讨论: http://crbug.com/415315
答案 2 :(得分:0)
正如我前面的人提到的,这是一个错误。没有解决方案,只有变通办法。
如Xan中已经描述的his answer。
感谢 weiya-ou 的 answer,我意识到我可以等待异步图标数据转换完成。
chrome.tabs
tabs
您需要 chrome.tabs.onUpdated.addListener((tabId, { status }, { url }) => {
// Only check when URL is resolved
if (status !== 'complete') return
// What is our target page?
const isOurPage = url?.match(/my\.page\.net/)
if (isOurPage) {
// Show active icon
chrome.pageAction.setIcon({
path: {
19: 'images/19.png',
38: 'images/38.png',
},
tabId,
})
} else {
// Show inactive icon
chrome.pageAction.setIcon({
path: {
19: 'images/19-inactive.png',
38: 'images/38-inactive.png',
},
tabId,
})
}
})
权限(如 here 所述)。
(pd.Series(Dict1).to_frame().T
.append(df,sort=False).fillna({"Id":"Desc"}).loc[:,df.columns])