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authortoasted-nutbread <toasted-nutbread@users.noreply.github.com>2020-02-16 13:48:06 -0500
committertoasted-nutbread <toasted-nutbread@users.noreply.github.com>2020-02-16 21:46:13 -0500
commit9fd6ee382d35fb5fcfc3e6d0f4fab711b37b693e (patch)
tree40e5ac9a3c325a422188ab4377902e39682bc34f /ext/fg/js/popup.js
parentd3aefdc4e3f78b87b99bff576137f530ac7ac163 (diff)
Create more generic function for injecting stylesheets
Diffstat (limited to 'ext/fg/js/popup.js')
-rw-r--r--ext/fg/js/popup.js132
1 files changed, 86 insertions, 46 deletions
diff --git a/ext/fg/js/popup.js b/ext/fg/js/popup.js
index 6fbab62b..d799e371 100644
--- a/ext/fg/js/popup.js
+++ b/ext/fg/js/popup.js
@@ -31,7 +31,6 @@ class Popup {
this._visible = false;
this._visibleOverride = null;
this._options = null;
- this._stylesheetInjectedViaApi = false;
this._contentScale = 1.0;
this._containerSizeContentScale = null;
@@ -159,20 +158,12 @@ class Popup {
}
async setCustomOuterCss(css, useWebExtensionApi) {
- // Cannot repeatedly inject stylesheets using web extension APIs since there is no way to remove them.
- if (this._stylesheetInjectedViaApi) { return; }
-
- if (!useWebExtensionApi || Popup._isOnExtensionPage()) {
- Popup.injectOuterStylesheet(css);
- } else {
- if (!css) { return; }
- try {
- await apiInjectStylesheet('code', css);
- this._stylesheetInjectedViaApi = true;
- } catch (e) {
- // NOP
- }
- }
+ return await Popup._injectStylesheet(
+ 'yomichan-popup-outer-user-stylesheet',
+ 'code',
+ css,
+ useWebExtensionApi
+ );
}
setChildrenSupported(value) {
@@ -187,26 +178,6 @@ class Popup {
return this._container.getBoundingClientRect();
}
- static injectOuterStylesheet(css) {
- if (Popup.outerStylesheet === null) {
- if (!css) { return; }
- Popup.outerStylesheet = document.createElement('style');
- Popup.outerStylesheet.id = 'yomichan-popup-outer-stylesheet';
- }
-
- const outerStylesheet = Popup.outerStylesheet;
- if (css) {
- outerStylesheet.textContent = css;
-
- const par = document.head;
- if (par && outerStylesheet.parentNode !== par) {
- par.appendChild(outerStylesheet);
- }
- } else {
- outerStylesheet.textContent = '';
- }
- }
-
// Private functions
_inject() {
@@ -248,7 +219,11 @@ class Popup {
});
this._observeFullscreen(true);
this._onFullscreenChanged();
- this.setCustomOuterCss(this._options.general.customPopupOuterCss, false);
+ try {
+ this.setCustomOuterCss(this._options.general.customPopupOuterCss, true);
+ } catch (e) {
+ // NOP
+ }
});
}
@@ -526,15 +501,6 @@ class Popup {
];
}
- static _isOnExtensionPage() {
- try {
- const url = chrome.runtime.getURL('/');
- return window.location.href.substring(0, url.length) === url;
- } catch (e) {
- // NOP
- }
- }
-
static _getViewport(useVisualViewport) {
const visualViewport = window.visualViewport;
if (visualViewport !== null && typeof visualViewport === 'object') {
@@ -567,6 +533,80 @@ class Popup {
bottom: window.innerHeight
};
}
+
+ static _isOnExtensionPage() {
+ try {
+ const url = chrome.runtime.getURL('/');
+ return window.location.href.substring(0, url.length) === url;
+ } catch (e) {
+ // NOP
+ }
+ }
+
+ static async _injectStylesheet(id, type, value, useWebExtensionApi) {
+ const injectedStylesheets = Popup._injectedStylesheets;
+
+ if (Popup._isOnExtensionPage()) {
+ // Permissions error will occur if trying to use the WebExtension API to inject
+ // into an extension page.
+ useWebExtensionApi = false;
+ }
+
+ let styleNode = injectedStylesheets.get(id);
+ if (typeof styleNode !== 'undefined') {
+ if (styleNode === null) {
+ // Previously injected via WebExtension API
+ throw new Error(`Stylesheet with id ${id} has already been injected using the WebExtension API`);
+ }
+ } else {
+ styleNode = null;
+ }
+
+ if (useWebExtensionApi) {
+ // Inject via WebExtension API
+ if (styleNode !== null && styleNode.parentNode !== null) {
+ styleNode.parentNode.removeChild(styleNode);
+ }
+
+ await apiInjectStylesheet(type, value);
+
+ injectedStylesheets.set(id, null);
+ return null;
+ }
+
+ // Create node in document
+ const parentNode = document.head;
+ if (parentNode === null) {
+ throw new Error('No parent node');
+ }
+
+ // Create or reuse node
+ const isFile = (type === 'file');
+ const tagName = isFile ? 'link' : 'style';
+ if (styleNode === null || styleNode.nodeName.toLowerCase() !== tagName) {
+ if (styleNode !== null && styleNode.parentNode !== null) {
+ styleNode.parentNode.removeChild(styleNode);
+ }
+ styleNode = document.createElement(tagName);
+ styleNode.id = id;
+ }
+
+ // Update node style
+ if (isFile) {
+ styleNode.rel = value;
+ } else {
+ styleNode.textContent = value;
+ }
+
+ // Update parent
+ if (styleNode.parentNode !== parentNode) {
+ parentNode.appendChild(styleNode);
+ }
+
+ // Add to map
+ injectedStylesheets.set(id, styleNode);
+ return styleNode;
+ }
}
-Popup.outerStylesheet = null;
+Popup._injectedStylesheets = new Map();