find.find()

queryphrase

string. 検索語。

options省略可

object. An object specifying additional options. It may take any of the following properties, all optional:

tabId

integer. ID of the tab to search. Defaults to the active tab.

caseSensitive

boolean. If true, the search is case-sensitive. Defaults to false.

entireWord

boolean. Match only entire words: so "Tok" will not be matched inside "Tokyo". Defaults to false.

includeRangeData

boolean. Include range data in the response, which describe where in the page DOM the match was found. Defaults to false.

includeRectData

boolean. Include rectangle data in the response, which describes where in the rendered page the match was found. Defaults to false.

A Promise that will be fulfilled with an object containing up to three properties:

count

integer. The number of results found.

rangeData省略可

array. If includeRangeData was given in the options parameter, then this property will be included. It is provided as an array of RangeData objects, one for each match. それぞれのRangeData は DOM ツリー構造をしています。検索語の周りを表示することなどにも使えます。

次の rectData, も同様に配列で rangeData[i] と rectData[i]は 1 対 1 で対応します。.

Each RangeData contains the following properties:

framePos

マッチした frame 番号(訳注： iframe ごとで変わる番号). 0 は通常のページ部分で親です。 Note that the order of objects in the rangeData array will sequentially line up with the order of frame indexes: for example, framePos for the first sequence of rangeData objects will be 0, framePos for the next sequence will be 1, and so on.

startTextNodePos

テキスト Node の 開始側 Index（訳注：直接この値を API 一本で活用できないため、下記のサンプルを参照）

endTextNodePos

テキスト Node の 終端側 Index.

startOffset

開始 Node 内の 初めの文字列の位置.

endOffset

終端 Node 内の 終わりの文字列の位置

rectData省略可

array. 呼び出し時にoptionsで includeRectData 引数を与えると結果を返します。 RectData objects の配列です。それらはマッチしたワードを含む、client rectangles を返します。拡張機能でハイライトなどに使えるでしょう。.

Each RectData object はそれぞれ 1 つのマッチに対して 2 つのプロパティを持ちます。

rectsAndTexts

1 対 1 の関係となる２つの配列を持ちます:

• rectList: ４つの integer をもつ配列: top, left, bottom, right. その位置情報は viewport における左上からの位置です。
• textList: 上記rectList[i]に含まれた textList[i] (string)を持つ配列です。

例えば Web ページ上で:

"You may"を探すと 2 つの矩形エリアで表現されます。:

RectData はこのようにマッチし、 rectsAndTexts.rectList と rectsAndTexts.textListは次のようになります。

• textList[0] = "You ", rectList[0] は HTML 上の境界を表す矩形エリアを含みます。
• textList[1] = "may", rectList[1]も"may"について同様です。

text

マッチしたテキスト全体、上の例では"You may"が丸ごと入ります。

Search the active tab for "banana", log the number of matches, and highlight them:

function found(results) {
  console.log(`There were: ${results.count} matches.`);
  if (results.count > 0) {
    browser.find.highlightResults();
  }
}

browser.find.find("banana").then(found);

Search for "banana" across all tabs (note that this requires the "tabs" permission, because it accesses tab.url):

async function findInAllTabs(allTabs) {
  for (let tab of allTabs) {
    let results = await browser.find.find("banana", {tabId: tab.id});
    console.log(`In page "${tab.url}": ${results.count} matches.`)
  }
}

browser.tabs.query({}).then(findInAllTabs);

In this example the extension uses rangeData to get the context in which the match was found. The context is the complete textContent of the node in which the match was found. If the match spanned nodes, the context is the concatenation of the textContent of all spanned nodes.

Note that for simplicity, this example doesn't handle pages that contain frames. To support this you'd need to split rangeData into groups, one per frame, and execute the script in each frame.

The background script:

// background.js

async function getContexts(matches) {

  // get the active tab ID
  let activeTabArray = await browser.tabs.query({
    active: true, currentWindow: true
  });
  let tabId = activeTabArray[0].id;

  // execute the content script in the active tab
  await browser.tabs.executeScript(tabId, {file: "get-context.js"});
  // ask the content script to get the contexts for us
  let contexts = await browser.tabs.sendMessage(tabId, {
    ranges: matches.rangeData
  });
  for (let context of contexts) {
    console.log(context);
  }

}

browser.browserAction.onClicked.addListener((tab) => {
  browser.find.find("example", {includeRangeData: true}).then(getContexts);
});

The content script:

/**
 * Get all the text nodes into a single array
 */
function getNodes() {
  let walker = document.createTreeWalker(document, window.NodeFilter.SHOW_TEXT, null, false);
  let nodes = [];
  while(node = walker.nextNode()) {
    nodes.push(node);
  }

  return nodes;
}

/**
 * Gets all text nodes in the document, then for each match, return the
 * complete text content of nodes that contained the match.
 * If a match spanned more than one node, concatenate the textContent
 * of each node.
 */
function getContexts(ranges) {

  let contexts = [];
  let nodes = getNodes();

  for (let range of ranges) {
    let context = nodes[range.startTextNodePos].textContent;
    let pos = range.startTextNodePos;
    while (pos < range.endTextNodePos) {
      pos++;
      context += nodes[pos].textContent;
    }
    contexts.push(context);
  }
  return contexts;
}

browser.runtime.onMessage.addListener((message, sender, sendResponse) => {
  sendResponse(getContexts(message.ranges));
});

In this example the extension uses rectData to "redact" the matches, by adding black DIVs over the top of their bounding rectangles:

Note that in many ways this is a poor way to redact pages.

The background script:

// background.js

async function redact(matches) {

  // get the active tab ID
  let activeTabArray = await browser.tabs.query({
    active: true, currentWindow: true
  });
  let tabId = activeTabArray[0].id;

  // execute the content script in the active tab
  await browser.tabs.executeScript(tabId, {file: "redact.js"});
  // ask the content script to redact matches for us
  await browser.tabs.sendMessage(tabId, {rects: matches.rectData});
}

browser.browserAction.onClicked.addListener((tab) => {
  browser.find.find("banana", {includeRectData: true}).then(redact);
});

The content script:

// redact.js

/**
 * Add a black DIV where the rect is.
 */
function redactRect(rect) {
  var redaction = document.createElement("div");
  redaction.style.backgroundColor = "black";
  redaction.style.position = "absolute";
  redaction.style.top = `${rect.top}px`;
  redaction.style.left = `${rect.left}px`;
  redaction.style.width = `${rect.right-rect.left}px`;
  redaction.style.height = `${rect.bottom-rect.top}px`;
  document.body.appendChild(redaction);
}

/**
 * Go through every rect, redacting them.
 */
function redactAll(rectData) {
  for (match of rectData) {
    for (rect of match.rectsAndTexts.rectList) {
      redactRect(rect);
    }
  }
}

browser.runtime.onMessage.addListener((message) => {
  redactAll(message.rects);
});

• find-across-tabs