chrome/common/extensions/api/declarative_content.json

// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

[
  {
    "namespace": "declarativeContent",
    "description": "Use the <code>chrome.declarativeContent</code> API to take actions depending on the content of a page, without requiring permission to read the page's content.",
    "types": [
      {
        "id": "PageStateMatcher",
        "type": "object",
        "description": "Matches the state of a web page by various criteria.",
        "properties": {
          "pageUrl": {
            "$ref": "events.UrlFilter",
            "description": "Matches if the condition of the UrlFilter are fulfilled for the top-level URL of the page.",
            "optional": true
          },
          "css": {
            "type": "array",
            "optional": true,
            "description": "Matches if all of the CSS selectors in the array match displayed elements in a frame with the same origin as the page's main frame.  All selectors in this array must be <a href=\"http://www.w3.org/TR/selectors4/#compound\">compound selectors</a> to speed up matching.  Note that listing hundreds of CSS selectors or CSS selectors that match hundreds of times per page can still slow down web sites.",
            // TODO(jyasskin): Figure out if we want to require all
            // the selectors to match in the same frame, or allow several
            // frames to contribute to a match.
            "items": { "type": "string" }
//        },
//          TODO: "text": {
//            "type": "array",
//            "optional": true,
//            "description": "Matches if all of the regular expressions in the array match text in the page. The regular expressions use the <a href=\"http://code.google.com/p/re2/wiki/Syntax\">RE2 syntax</a>.",
//            "items": { "type": "string" }
          },
          "instanceType": {
            "type": "string", "enum": ["declarativeContent.PageStateMatcher"],
            "nodoc": true
          }
        }
      },
      {
        "id": "ShowPageAction",
        "description": "Declarative event action that shows the extension's $ref:[pageAction page action] while the corresponding conditions are met.  This action can be used without <a href=\"declare_permissions.html#host-permission\">host permissions</a>, but the extension must have a page action.  If the extension takes the <a href=\"activeTab.html\">activeTab</a> permission, a click on the page action will grant access to the active tab.",
        "type": "object",
        "properties": {
          "instanceType": {
            "type": "string", "enum": ["declarativeContent.ShowPageAction"],
            "nodoc": true
          }
        }
      }
    ],
    "functions": [
    ],
    "events": [
      {
        "name": "onPageChanged",
        "options": {
          "supportsListeners": false,
          "supportsRules": true,
          "conditions": ["declarativeContent.PageStateMatcher"],
          "actions": [
            "declarativeContent.ShowPageAction"
          ]
        }
      }
    ]
  }
]