Maximum clipboard search length (#1118)

* Add maximumClipboardSearchLength an option

* Add setting

* Add limits

* Update tests

6 files changed, 40 insertions, 3 deletions

diff --git a/ext/bg/data/options-schema.json b/ext/bg/data/options-schema.json
index 4a953243..85275952 100644
--- a/ext/bg/data/options-schema.json
+++ b/ext/bg/data/options-schema.json
@@ -108,7 +108,8 @@
                                     "showIframePopupsInRootFrame",
                                     "useSecurePopupFrameUrl",
                                     "usePopupShadowDom",
-                                    "usePopupWindow"
+                                    "usePopupWindow",
+                                    "maximumClipboardSearchLength"
                                 ],
                                 "properties": {
                                     "enable": {
@@ -259,6 +260,11 @@
                                     "usePopupWindow": {
                                         "type": "boolean",
                                         "default": false
+                                    },
+                                    "maximumClipboardSearchLength": {
+                                        "type": "integer",
+                                        "default": 1000,
+                                        "minimum": 0
                                     }
                                 }
                             },
diff --git a/ext/bg/js/backend.js b/ext/bg/js/backend.js
index b731fc6c..fb11ba2e 100644
--- a/ext/bg/js/backend.js
+++ b/ext/bg/js/backend.js
@@ -240,6 +240,10 @@ class Backend {
     // Event handlers
 
     async _onClipboardTextChange({text}) {
+        const {general: {maximumClipboardSearchLength}} = this.getOptions({current: true});
+        if (text.length > maximumClipboardSearchLength) {
+            text = text.substring(0, maximumClipboardSearchLength);
+        }
         try {
             const {tab, created} = await this._getOrCreateSearchPopup();
             await this._focusTab(tab);
diff --git a/ext/bg/js/options.js b/ext/bg/js/options.js
index 5fb10516..876079dc 100644
--- a/ext/bg/js/options.js
+++ b/ext/bg/js/options.js
@@ -481,6 +481,10 @@ class OptionsUtil {
             {
                 async: true,
                 update: this._updateVersion6.bind(this)
+            },
+            {
+                async: false,
+                update: this._updateVersion7.bind(this)
             }
         ];
     }
@@ -654,4 +658,13 @@ class OptionsUtil {
         templates = templates.replace(/\bcompactGlossaries=((?:\.*\/)*)compactGlossaries\b/g, (g0, g1) => `${g0} data=${g1}.`);
         return templates;
     }
+
+    _updateVersion7(options) {
+        // Version 7 changes:
+        //  Added general.maximumClipboardSearchLength.
+        for (const profile of options.profiles) {
+            profile.options.general.maximumClipboardSearchLength = 1000;
+        }
+        return options;
+    }
 }
diff --git a/ext/bg/js/search.js b/ext/bg/js/search.js
index d99e76e0..85efc7a0 100644
--- a/ext/bg/js/search.js
+++ b/ext/bg/js/search.js
@@ -197,6 +197,10 @@ class DisplaySearch extends Display {
     }
 
     _onExternalSearchUpdate({text, animate=true}) {
+        const {general: {maximumClipboardSearchLength}} = this.getOptions();
+        if (text.length > maximumClipboardSearchLength) {
+            text = text.substring(0, maximumClipboardSearchLength);
+        }
         this._queryInput.value = text;
         this._search(animate, false);
     }
diff --git a/ext/bg/settings2.html b/ext/bg/settings2.html
index 7e2e2e35..8ff0f14e 100644
--- a/ext/bg/settings2.html
+++ b/ext/bg/settings2.html
@@ -399,6 +399,15 @@
                 </p>
             </div>
         </div>
+        <div class="settings-item advanced-only"><div class="settings-item-inner">
+            <div class="settings-item-left">
+                <div class="settings-item-label">Maximum clipboard text search length</div>
+                <div class="settings-item-description">Limit the number of text characters used when searching clipboard content.</div>
+            </div>
+            <div class="settings-item-right">
+                <input type="number" min="0" step="1" data-setting="general.maximumClipboardSearchLength">
+            </div>
+        </div></div>
     </div>
 
     <h2 id="popup-appearance">Popup Appearance</h2>
diff --git a/test/test-options-util.js b/test/test-options-util.js
index cfb1c87d..ca14e8d4 100644
--- a/test/test-options-util.js
+++ b/test/test-options-util.js
@@ -292,7 +292,8 @@ function createProfileOptionsUpdatedTestData1() {
             showIframePopupsInRootFrame: false,
             useSecurePopupFrameUrl: true,
             usePopupShadowDom: true,
-            usePopupWindow: false
+            usePopupWindow: false,
+            maximumClipboardSearchLength: 1000
         },
         audio: {
             enabled: true,
@@ -498,7 +499,7 @@ function createOptionsUpdatedTestData1() {
             }
         ],
         profileCurrent: 0,
-        version: 6,
+        version: 7,
         global: {
             database: {
                 prefixWildcardsSupported: false