mirror of
https://github.com/kiwix/kiwix-apple.git
synced 2025-09-26 13:29:31 -04:00
table of content
This commit is contained in:
Chris Li
parent
fcf6fc46a4
commit
a5636e0b60
@ -42,16 +42,16 @@ class JS {
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// MARK: - Table of Contents
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class func startTOCCallBack(_ webView: UIWebView) {
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webView.stringByEvaluatingJavaScript(from: "startCallBack()")
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class func startTOCCallBack(webView: UIWebView) {
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webView.stringByEvaluatingJavaScript(from: "tableOfContents.startCallBack()")
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}
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class func stopTOCCallBack(_ webView: UIWebView) {
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webView.stringByEvaluatingJavaScript(from: "stopCallBack()")
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class func stopTOCCallBack(webView: UIWebView) {
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webView.stringByEvaluatingJavaScript(from: "tableOfContents.stopCallBack()")
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}
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class func getTableOfContents(from webView: UIWebView) -> [HTMLHeading] {
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let jString = "getTableOfContents().headerObjects;"
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class func getTableOfContents(webView: UIWebView) -> [HTMLHeading] {
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let jString = "tableOfContents.getHeadingObjects()"
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guard let elements = webView.context.evaluateScript(jString).toArray() as? [[String: Any]] else {return [HTMLHeading]()}
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var headings = [HTMLHeading]()
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for element in elements {
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@ -61,6 +61,10 @@ class JS {
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return headings
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}
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class func scrollToHeading(webView: UIWebView, index: Int) {
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webView.stringByEvaluatingJavaScript(from: "tableOfContents.scrollToView(\(index))")
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}
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}
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extension UIWebView {
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@ -16,13 +16,23 @@ import CloudKit
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extension MainController: UIWebViewDelegate, SFSafariViewControllerDelegate {
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func webView(_ webView: UIWebView, shouldStartLoadWith request: URLRequest, navigationType: UIWebViewNavigationType) -> Bool {
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guard let url = request.url else {return false}
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guard url.isKiwixURL else {
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if url.isKiwixURL {
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return true
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} else if url.scheme == "pagescroll" {
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let components = URLComponents(string: url.absoluteString)
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guard let query = components?.queryItems,
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let startStr = query[0].value, let start = Int(startStr),
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let lengthStr = query[1].value, let length = Int(lengthStr) else {
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return false
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}
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tableOfContentsController?.visibleRange = (start, length)
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return false
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} else {
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let controller = SFSafariViewController(url: url)
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controller.delegate = self
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present(controller, animated: true, completion: nil)
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return false
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}
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return true
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}
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func webViewDidStartLoad(_ webView: UIWebView) {
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@ -32,6 +42,8 @@ extension MainController: UIWebViewDelegate, SFSafariViewControllerDelegate {
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func webViewDidFinishLoad(_ webView: UIWebView) {
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JS.inject(webView: webView)
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JS.preventDefaultLongTap(webView: webView)
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JS.startTOCCallBack(webView: webView)
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URLResponseCache.shared.stop()
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guard let url = webView.request?.url,
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@ -155,7 +167,7 @@ extension MainController: ButtonDelegates {
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}
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func didTapTOCButton() {
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tableOfContentsController?.headings = JS.getTableOfContents(from: webView)
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tableOfContentsController?.headings = JS.getTableOfContents(webView: webView)
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isShowingTableOfContents ? hideTableOfContents(animated: true) : showTableOfContents(animated: true)
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}
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@ -228,8 +240,6 @@ extension MainController: TableOfContentsDelegate {
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view.layoutIfNeeded()
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dimView.alpha = 0.5
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}
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JS.startTOCCallBack(webView)
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}
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func hideTableOfContents(animated: Bool) {
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@ -251,8 +261,6 @@ extension MainController: TableOfContentsDelegate {
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dimView.isHidden = true
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tocVisiualEffectView.isHidden = true
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}
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JS.stopTOCCallBack(webView)
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}
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func configureTOCConstraints() {
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@ -274,8 +282,11 @@ extension MainController: TableOfContentsDelegate {
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}
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}
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func didSelectTOCItem(heading: HTMLHeading) {
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func didSelectHeading(index: Int) {
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JS.scrollToHeading(webView: webView, index: index)
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if traitCollection.horizontalSizeClass == .compact {
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hideTableOfContents(animated: true)
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}
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}
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@IBAction func didTapTOCDimView(_ sender: UITapGestureRecognizer) {
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@ -15,20 +15,17 @@ class TableOfContentsController: UIViewController, UITableViewDelegate, UITableV
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private let visibleHeaderIndicator = UIView()
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weak var delegate: TableOfContentsDelegate?
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private var headinglevelMin = 0
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var headings = [HTMLHeading]() {
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didSet {
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configurePreferredContentSize()
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headinglevelMin = max(2, headings.map({$0.level}).min() ?? 0)
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visibleHeaderIDs.removeAll()
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tableView.reloadData()
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}
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}
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var visibleHeaderIDs = [String]() {
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var visibleRange: (start: Int, length: Int)? {
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didSet {
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guard oldValue != visibleHeaderIDs else {return}
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configureVisibleHeaderView(animated: oldValue.count > 0)
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configureVisibleHeaderView(animated: true)
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}
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}
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@ -50,43 +47,40 @@ class TableOfContentsController: UIViewController, UITableViewDelegate, UITableV
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}
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func configureVisibleHeaderView(animated: Bool) {
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// // no visible header
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// guard visibleHeaderIDs.count > 0 else {
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// visibleHeaderIndicator.isHidden = true
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// return
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// }
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//
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// // calculations
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// guard let minIndex = headings.index(where: {$0.id == visibleHeaderIDs.first}),
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// let maxIndex = headings.index(where: {$0.id == visibleHeaderIDs.last}) else {return}
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// let topIndexPath = IndexPath(row: minIndex, section: 0)
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// let bottomIndexPath = IndexPath(row: maxIndex, section: 0)
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// let topCellFrame = tableView.rectForRow(at: topIndexPath)
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// let bottomCellFrame = tableView.rectForRow(at: bottomIndexPath)
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// let top = topCellFrame.origin.y + topCellFrame.height * 0.1
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// let bottom = bottomCellFrame.origin.y + bottomCellFrame.height * 0.9
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//
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// // indicator frame
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// visibleHeaderIndicator.isHidden = false
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// if animated {
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// UIView.animate(withDuration: 0.1, animations: {
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// self.visibleHeaderIndicator.frame = CGRect(x: 0, y: top, width: 3, height: bottom - top)
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// })
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// } else {
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// visibleHeaderIndicator.frame = CGRect(x: 0, y: top, width: 3, height: bottom - top)
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// }
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//
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// // tableview scroll
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// let topCellVisible = tableView.indexPathsForVisibleRows?.contains(topIndexPath) ?? false
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// let bottomCellVisible = tableView.indexPathsForVisibleRows?.contains(bottomIndexPath) ?? false
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// switch (topCellVisible, bottomCellVisible) {
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// case (true, false):
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// tableView.scrollToRow(at: bottomIndexPath, at: .bottom, animated: animated)
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// case (false, true), (false, false):
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// tableView.scrollToRow(at: topIndexPath, at: .top, animated: animated)
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// default:
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// return
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// }
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// no visible header
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guard let visibleRange = visibleRange else {
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visibleHeaderIndicator.isHidden = true
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return
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}
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let topIndexPath = IndexPath(row: visibleRange.start, section: 0)
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let bottomIndexPath = IndexPath(row: visibleRange.start + visibleRange.length - 1, section: 0)
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let topCellFrame = tableView.rectForRow(at: topIndexPath)
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let bottomCellFrame = tableView.rectForRow(at: bottomIndexPath)
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let top = topCellFrame.origin.y + topCellFrame.height * 0.1
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let bottom = bottomCellFrame.origin.y + bottomCellFrame.height * 0.9
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// indicator frame
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visibleHeaderIndicator.isHidden = false
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if animated {
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UIView.animate(withDuration: 0.1, animations: {
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self.visibleHeaderIndicator.frame = CGRect(x: 0, y: top, width: 3, height: bottom - top)
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})
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} else {
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visibleHeaderIndicator.frame = CGRect(x: 0, y: top, width: 3, height: bottom - top)
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}
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// tableview scroll
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let topCellVisible = tableView.indexPathsForVisibleRows?.contains(topIndexPath) ?? false
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let bottomCellVisible = tableView.indexPathsForVisibleRows?.contains(bottomIndexPath) ?? false
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switch (topCellVisible, bottomCellVisible) {
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case (true, false):
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tableView.scrollToRow(at: bottomIndexPath, at: .bottom, animated: animated)
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case (false, true), (false, false):
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tableView.scrollToRow(at: topIndexPath, at: .top, animated: animated)
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default:
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return
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}
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}
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// MARK: - Table view data source
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@ -113,7 +107,7 @@ class TableOfContentsController: UIViewController, UITableViewDelegate, UITableV
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default:
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let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath)
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cell.textLabel?.text = heading.textContent
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cell.indentationLevel = max(0, (heading.level - headinglevelMin) * 2)
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cell.indentationLevel = (heading.level - 2) * 2
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return cell
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}
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}
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@ -121,7 +115,7 @@ class TableOfContentsController: UIViewController, UITableViewDelegate, UITableV
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// MARK: - Table view delegate
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func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
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delegate?.didSelectTOCItem(heading: headings[indexPath.row])
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delegate?.didSelectHeading(index: indexPath.row)
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tableView.deselectRow(at: indexPath, animated: true)
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}
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@ -145,5 +139,5 @@ class TableOfContentsController: UIViewController, UITableViewDelegate, UITableV
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}
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protocol TableOfContentsDelegate: class {
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func didSelectTOCItem(heading: HTMLHeading)
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func didSelectHeading(index: Int)
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}
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@ -1,149 +1,67 @@
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var toc = undefined;
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var visEle = undefined;
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var visibleHeaderIDs = undefined;
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function getTableOfContents() {
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toc = toc == undefined ? new TableOfContents() : toc;
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return toc;
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}
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function TableOfContents () {
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this.getHeaderElements = function () {
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var h1 = document.getElementsByTagName('h1')[0];
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var elememts = Array.prototype.slice.call(document.querySelectorAll('h2, h3, h4'));
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elememts.splice(0, 0, h1);
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return elememts;
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}
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this.headings = document.querySelectorAll("h1, h2, h3, h4, h5, h6");
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this.headerElements = this.getHeaderElements();
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this.getHeaderObjects = function () {
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return this.headerElements.map( elementToObject );
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}
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this.headerObjects = this.getHeaderObjects();
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function elementToObject(element, index) {
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this.getHeadingObjects = function () {
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var headings = [];
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for (i = 0; i < this.headings.length; i++) {
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var element = this.headings[i];
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var obj = {};
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obj.id = element.id;
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obj.index = index;
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obj.index = i;
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obj.textContent = element.textContent;
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obj.tagName = element.tagName;
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return obj;
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headings.push(obj);
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}
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return headings;
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}
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function getVisibleElementsChecker() {
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visEle = visEle == undefined ? new VisibleElements() : visEle;
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return visEle;
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this.scrollToView = function (index) {
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this.headings[index].scrollIntoView();
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}
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function VisibleElements () {
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// return a 2d array [[header(h1/h2/h3), p, ul, div]]
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function getElementGroups() {
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var groups = [];
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var group = [document.getElementsByTagName('h1')[0]];
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var contents = document.getElementById("mw-content-text").children;
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var headerTags = ['h2', 'h3', 'h4'].map(function(x){ return x.toUpperCase() });
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for (i = 0; i < contents.length; i++) {
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var element = contents[i];
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if (headerTags.includes(element.tagName)) {
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groups.push(group);
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group = []
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}
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group.push(element);
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}
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groups.push(group);
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return groups;
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}
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this.elementGroups = getElementGroups();
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this.getVisibleHeaders = function () {
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var groups = this.elementGroups;
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this.getVisibleHeadingIndex = function () {
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var viewHeight = Math.max(document.documentElement.clientHeight, window.innerHeight);
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var visibleHeaders = [];
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var aboveIndexes = [];
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var visibleIndexes = [];
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var belowIndexes = [];
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for (i = 0; i < groups.length; i++) {
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var group = groups[i];
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var header = group[0];
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var groupVisible = false;
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for (j = 0; j < group.length; j++) {
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var element = group[j];
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for (i = 0; i < this.headings.length; i++) {
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var element = this.headings[i];
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var rect = element.getBoundingClientRect();
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var isVisible = !(rect.bottom < 0 || rect.top - viewHeight >= 0);
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groupVisible = groupVisible || isVisible;
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if (isVisible) { // if found an element visible in group, break and check the next group
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visibleHeaders.push(header)
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break;
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var isAboveTopBorder = rect.bottom < 0;
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var isBelowBottomBorder = viewHeight - rect.top < 0;
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if (isAboveTopBorder) {
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aboveIndexes.push(i);
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} else if (isBelowBottomBorder) {
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belowIndexes.push(i);
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} else {
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visibleIndexes.push(i);
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}
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}
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// If found visible groups already, but current group is not visible
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// It means we are checking area below the visible area, should break
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if (visibleHeaders.length > 0 && !groupVisible) {
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break;
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if (aboveIndexes.length > 0) {
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return [aboveIndexes[aboveIndexes.length-1]].concat(visibleIndexes);
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} else {
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return visibleIndexes;
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}
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}
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return visibleHeaders;
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this.startCallBack = function () {
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var handleScroll = function() {
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var indexes = tableOfContents.getVisibleHeadingIndex();
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if (indexes.length > 0) {
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window.location = 'pagescroll:scrollEnded?start=' + indexes[0] + '&length=' + indexes.length;
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}
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}
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window.onscroll = handleScroll;
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handleScroll();
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}
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this.getVisibleHeaderIDs = function () {
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return this.getVisibleHeaders().map(function(x){ return x.id });
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}
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}
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function startCallBack() {
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function arraysEqual(a, b) {
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if (a === b) return true;
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if (a == null || b == null) return false;
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if (a.length != b.length) return false;
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for (var i = 0; i < a.length; ++i) {
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if (a[i] !== b[i]) return false;
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}
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return true;
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}
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function callBack(visibleHeaderIDs) {
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var parameter = visibleHeaderIDs.map(function(x){ return 'header=' + x }).join('&');
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window.location = 'pagescroll:scrollEnded?' + parameter;
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}
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visibleHeaderIDs = getVisibleElementsChecker().getVisibleHeaderIDs();
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window.onscroll = function() {
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var newVisibleHeaderIDs = getVisibleElementsChecker().getVisibleHeaderIDs();
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if (!arraysEqual(visibleHeaderIDs, newVisibleHeaderIDs)) {
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visibleHeaderIDs = newVisibleHeaderIDs;
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callBack(visibleHeaderIDs);
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}
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};
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callBack(visibleHeaderIDs);
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}
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function stopCallBack() {
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this.stopCallBack = function () {
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window.onscroll = undefined;
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}
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}
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function getSnippet() {
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var element = document.getElementById('mw-content-text');
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if (element) {
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var children = element.children;
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for (i = 0; i < children.length; i++) {
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var child = children[i];
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if (child.tagName == 'P') {
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var text = child.textContent || child.innerText || "";
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if (text.replace(/\s/g, '').length) {
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var regex = /\[[0-9|a-z|A-Z| ]*\]/g;
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text = text.replace(regex, "");
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return text;
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}
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}
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}
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}
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return null;
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}
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var tableOfContents = new TableOfContents();
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