| /* |
| * Copyright (C) 2009, 2010, 2011, 2012 Google Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
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| * in the documentation and/or other materials provided with the |
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| * this software without specific prior written permission. |
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| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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| */ |
| |
| #ifndef THIRD_PARTY_BLINK_PUBLIC_WEB_WEB_VIEW_H_ |
| #define THIRD_PARTY_BLINK_PUBLIC_WEB_WEB_VIEW_H_ |
| |
| #include "base/time/time.h" |
| #include "third_party/blink/public/common/manifest/web_display_mode.h" |
| #include "third_party/blink/public/platform/web_drag_operation.h" |
| #include "third_party/blink/public/platform/web_focus_type.h" |
| #include "third_party/blink/public/platform/web_string.h" |
| #include "third_party/skia/include/core/SkColor.h" |
| |
| namespace gfx { |
| class Point; |
| } |
| |
| namespace blink { |
| class PageScheduler; |
| class WebFrame; |
| class WebHitTestResult; |
| class WebLocalFrame; |
| class WebPageImportanceSignals; |
| class WebPagePopup; |
| class WebPrerendererClient; |
| class WebRemoteFrame; |
| class WebSettings; |
| class WebString; |
| class WebViewClient; |
| class WebWidget; |
| class WebWidgetClient; |
| struct WebDeviceEmulationParams; |
| struct WebFloatPoint; |
| struct WebFloatSize; |
| struct WebPluginAction; |
| struct WebRect; |
| struct WebSize; |
| struct WebWindowFeatures; |
| |
| class WebView { |
| public: |
| BLINK_EXPORT static const double kTextSizeMultiplierRatio; |
| BLINK_EXPORT static const double kMinTextSizeMultiplier; |
| BLINK_EXPORT static const double kMaxTextSizeMultiplier; |
| |
| enum StyleInjectionTarget { |
| kInjectStyleInAllFrames, |
| kInjectStyleInTopFrameOnly |
| }; |
| |
| // Initialization ------------------------------------------------------ |
| |
| // Creates a WebView that is NOT yet initialized. To complete initialization, |
| // call WebLocalFrame::CreateMainFrame() or WebRemoteFrame::CreateMainFrame() |
| // as appropriate. It is legal to modify settings before completing |
| // initialization. |
| // |
| // clients may be null, but should both be null or not together. |
| // |is_hidden| defines the initial visibility of the page. |
| // |compositing_enabled| dictates whether accelerated compositing should be |
| // enabled for the page. It must be false if no clients are provided, or if a |
| // LayerTreeView will not be set for the WebWidget. |
| // TODO(danakj): This field should go away as WebWidgets always composite |
| // their output. |
| BLINK_EXPORT static WebView* Create(WebViewClient*, |
| WebWidgetClient*, |
| bool is_hidden, |
| bool compositing_enabled, |
| WebView* opener); |
| |
| // Initializes the various client interfaces. |
| virtual void SetPrerendererClient(WebPrerendererClient*) = 0; |
| |
| // Options ------------------------------------------------------------- |
| |
| // The returned pointer is valid for the lifetime of the WebView. |
| virtual WebSettings* GetSettings() = 0; |
| |
| // Corresponds to the encoding of the main frame. Setting the page |
| // encoding may cause the main frame to reload. |
| virtual WebString PageEncoding() const = 0; |
| |
| // Controls whether pressing Tab key advances focus to links. |
| virtual bool TabsToLinks() const = 0; |
| virtual void SetTabsToLinks(bool) = 0; |
| |
| // Method that controls whether pressing Tab key cycles through page |
| // elements or inserts a '\t' char in the focused text area. |
| virtual bool TabKeyCyclesThroughElements() const = 0; |
| virtual void SetTabKeyCyclesThroughElements(bool) = 0; |
| |
| // Controls the WebView's active state, which may affect the rendering |
| // of elements on the page (i.e., tinting of input elements). |
| virtual bool IsActive() const = 0; |
| virtual void SetIsActive(bool) = 0; |
| |
| // Allows disabling domain relaxation. |
| virtual void SetDomainRelaxationForbidden(bool, const WebString& scheme) = 0; |
| |
| // Allows setting the state of the various bars exposed via BarProp |
| // properties on the window object. The size related fields of |
| // WebWindowFeatures are ignored. |
| virtual void SetWindowFeatures(const WebWindowFeatures&) = 0; |
| |
| // Marks the WebView as being opened by a DOM call. This is relevant |
| // for whether window.close() may be called. |
| virtual void SetOpenedByDOM() = 0; |
| |
| // Frames -------------------------------------------------------------- |
| |
| virtual WebFrame* MainFrame() = 0; |
| |
| // Focus --------------------------------------------------------------- |
| |
| virtual WebLocalFrame* FocusedFrame() = 0; |
| virtual void SetFocusedFrame(WebFrame*) = 0; |
| |
| // Sets the provided frame as focused and fires blur/focus events on any |
| // currently focused elements in old/new focused documents. Note that this |
| // is different from setFocusedFrame, which does not fire events on focused |
| // elements. |
| virtual void FocusDocumentView(WebFrame*) = 0; |
| |
| // Focus the first (last if reverse is true) focusable node. |
| virtual void SetInitialFocus(bool reverse) = 0; |
| |
| // Clears the focused element (and selection if a text field is focused) |
| // to ensure that a text field on the page is not eating keystrokes we |
| // send it. |
| virtual void ClearFocusedElement() = 0; |
| |
| // Smooth scroll the root layer to |targetX|, |targetY| in |durationMs|. |
| virtual void SmoothScroll(int target_x, int target_y, long duration_ms) {} |
| |
| // Advance the focus of the WebView forward to the next element or to the |
| // previous element in the tab sequence (if reverse is true). |
| virtual void AdvanceFocus(bool reverse) {} |
| |
| // Advance the focus from the frame |from| to the next in sequence |
| // (determined by WebFocusType) focusable element in frame |to|. Used when |
| // focus needs to advance to/from a cross-process frame. |
| virtual void AdvanceFocusAcrossFrames(WebFocusType, |
| WebRemoteFrame* from, |
| WebLocalFrame* to) {} |
| |
| // Zoom ---------------------------------------------------------------- |
| |
| // Returns the current zoom level. 0 is "original size", and each increment |
| // above or below represents zooming 20% larger or smaller to default limits |
| // of 300% and 50% of original size, respectively. Only plugins use |
| // non whole-numbers, since they might choose to have specific zoom level so |
| // that fixed-width content is fit-to-page-width, for example. |
| virtual double ZoomLevel() = 0; |
| |
| // Changes the zoom level to the specified level, clamping at the limits |
| // noted above, and returns the current zoom level after applying the |
| // change. |
| virtual double SetZoomLevel(double) = 0; |
| |
| // Updates the zoom limits for this view. |
| virtual void ZoomLimitsChanged(double minimum_zoom_level, |
| double maximum_zoom_level) = 0; |
| |
| // Helper functions to convert between zoom level and zoom factor. zoom |
| // factor is zoom percent / 100, so 300% = 3.0. |
| BLINK_EXPORT static double ZoomLevelToZoomFactor(double zoom_level); |
| BLINK_EXPORT static double ZoomFactorToZoomLevel(double factor); |
| |
| // Returns the current text zoom factor, where 1.0 is the normal size, > 1.0 |
| // is scaled up and < 1.0 is scaled down. |
| virtual float TextZoomFactor() = 0; |
| |
| // Scales the text in the page by a factor of textZoomFactor. |
| // Note: this has no effect on plugins. |
| virtual float SetTextZoomFactor(float) = 0; |
| |
| // Gets the scale factor of the page, where 1.0 is the normal size, > 1.0 |
| // is scaled up, < 1.0 is scaled down. |
| virtual float PageScaleFactor() const = 0; |
| |
| // Scales the page without affecting layout by using the visual viewport. |
| virtual void SetPageScaleFactor(float) = 0; |
| |
| // Minimum and Maximum as computed as a combination of default, page defined, |
| // UA, etc. constraints. |
| virtual float MinimumPageScaleFactor() const = 0; |
| virtual float MaximumPageScaleFactor() const = 0; |
| |
| // Sets the offset of the visual viewport within the main frame, in |
| // partial CSS pixels. The offset will be clamped so the visual viewport |
| // stays within the frame's bounds. |
| virtual void SetVisualViewportOffset(const WebFloatPoint&) = 0; |
| |
| // Gets the visual viewport's current offset within the page's main frame, |
| // in partial CSS pixels. |
| virtual WebFloatPoint VisualViewportOffset() const = 0; |
| |
| // Get the visual viewport's size in CSS pixels. |
| virtual WebFloatSize VisualViewportSize() const = 0; |
| |
| // Sets the default minimum, and maximum page scale. These will be overridden |
| // by the page or by the overrides below if they are set. |
| virtual void SetDefaultPageScaleLimits(float min_scale, float max_scale) = 0; |
| |
| // Sets the initial page scale to the given factor. This scale setting |
| // overrides |
| // page scale set in the page's viewport meta tag. |
| virtual void SetInitialPageScaleOverride(float) = 0; |
| |
| // Sets the maximum page scale considered to be legible. Automatic zooms (e.g, |
| // double-tap or find in page) will have the page scale limited to this value |
| // times the font scale factor. Manual pinch zoom will not be affected by this |
| // limit. |
| virtual void SetMaximumLegibleScale(float) = 0; |
| |
| // Reset any saved values for the scroll and scale state. |
| virtual void ResetScrollAndScaleState() = 0; |
| |
| // Prevent the web page from setting min/max scale via the viewport meta |
| // tag. This is an accessibility feature that lets folks zoom in to web |
| // pages even if the web page tries to block scaling. |
| virtual void SetIgnoreViewportTagScaleLimits(bool) = 0; |
| |
| // Returns the "preferred" contents size, defined as the preferred minimum |
| // width of the main document's contents and the minimum height required to |
| // display the main document without scrollbars. If the document is in quirks |
| // mode (does not have <!doctype html>), the height will stretch to fill the |
| // viewport. The returned size has the page zoom factor applied. The lifecycle |
| // must be updated to at least layout before calling (see: |UpdateLifecycle|). |
| virtual WebSize ContentsPreferredMinimumSize() = 0; |
| |
| // Requests a page-scale animation based on the specified point/rect. |
| virtual void AnimateDoubleTapZoom(const gfx::Point&, const WebRect&) = 0; |
| |
| // Sets the display mode of the web app. |
| virtual void SetDisplayMode(WebDisplayMode) = 0; |
| |
| // Sets the ratio as computed by computePageScaleConstraints. |
| // TODO(oshima): Remove this once the device scale factor implementation is |
| // fully migrated to use zooming mechanism. |
| virtual void SetDeviceScaleFactor(float) = 0; |
| |
| // Sets the additional zoom factor used for device scale factor. This is used |
| // to scale the content by the device scale factor, without affecting zoom |
| // level. |
| virtual void SetZoomFactorForDeviceScaleFactor(float) = 0; |
| |
| virtual float ZoomFactorForDeviceScaleFactor() = 0; |
| |
| // Resize the view at the same time as changing the state of the top |
| // controls. If |browser_controls_shrink_layout| is true, the embedder shrunk |
| // the WebView size by the browser controls height. |
| virtual void ResizeWithBrowserControls( |
| const WebSize&, |
| float top_controls_height, |
| float bottom_controls_height, |
| bool browser_controls_shrink_layout) = 0; |
| |
| // Auto-Resize ----------------------------------------------------------- |
| |
| // In auto-resize mode, the view is automatically adjusted to fit the html |
| // content within the given bounds. |
| virtual void EnableAutoResizeMode(const WebSize& min_size, |
| const WebSize& max_size) = 0; |
| |
| // Turn off auto-resize. |
| virtual void DisableAutoResizeMode() = 0; |
| |
| // Media --------------------------------------------------------------- |
| |
| // Performs the specified plugin action on the node at the given location. |
| virtual void PerformPluginAction(const WebPluginAction&, |
| const gfx::Point& location) = 0; |
| |
| // Notifies WebView when audio is started or stopped. |
| virtual void AudioStateChanged(bool is_audio_playing) = 0; |
| |
| // Data exchange ------------------------------------------------------- |
| |
| // Do a hit test equivalent to what would be done for a GestureTap event |
| // that has width/height corresponding to the supplied |tapArea|. |
| virtual WebHitTestResult HitTestResultForTap(const gfx::Point& tap_point, |
| const WebSize& tap_area) = 0; |
| |
| // Support for resource loading initiated by plugins ------------------- |
| |
| // Returns next unused request identifier which is unique within the |
| // parent Page. |
| virtual unsigned long CreateUniqueIdentifierForRequest() = 0; |
| |
| // Developer tools ----------------------------------------------------- |
| |
| // Enables device emulation as specified in params. |
| virtual void EnableDeviceEmulation(const WebDeviceEmulationParams&) = 0; |
| |
| // Cancel emulation started via |enableDeviceEmulation| call. |
| virtual void DisableDeviceEmulation() = 0; |
| |
| |
| // Context menu -------------------------------------------------------- |
| |
| virtual void PerformCustomContextMenuAction(unsigned action) = 0; |
| |
| // Notify that context menu has been closed. |
| virtual void DidCloseContextMenu() = 0; |
| |
| // Popup menu ---------------------------------------------------------- |
| |
| // Sets whether select popup menus should be rendered by the browser. |
| BLINK_EXPORT static void SetUseExternalPopupMenus(bool); |
| |
| // Cancels and hides the current popup (datetime, select...) if any. |
| virtual void CancelPagePopup() = 0; |
| |
| // Returns the current popup if any. |
| virtual WebPagePopup* GetPagePopup() const = 0; |
| |
| // Visited link state -------------------------------------------------- |
| |
| // Tells all WebView instances to update the visited link state for the |
| // specified hash. |
| BLINK_EXPORT static void UpdateVisitedLinkState(unsigned long long hash); |
| |
| // Tells all WebView instances to update the visited state for all |
| // their links. Use invalidateVisitedLinkHashes to inform that the visitedlink |
| // table was changed and the salt was changed too. And all cached visitedlink |
| // hashes need to be recalculated. |
| BLINK_EXPORT static void ResetVisitedLinkState( |
| bool invalidate_visited_link_hashes); |
| |
| // Custom colors ------------------------------------------------------- |
| |
| virtual void SetSelectionColors(unsigned active_background_color, |
| unsigned active_foreground_color, |
| unsigned inactive_background_color, |
| unsigned inactive_foreground_color) = 0; |
| |
| // Modal dialog support ------------------------------------------------ |
| |
| // Call these methods before and after running a nested, modal event loop |
| // to suspend script callbacks and resource loads. |
| BLINK_EXPORT static void WillEnterModalLoop(); |
| BLINK_EXPORT static void DidExitModalLoop(); |
| |
| virtual void SetShowPaintRects(bool) = 0; |
| virtual void SetShowFPSCounter(bool) = 0; |
| virtual void SetShowScrollBottleneckRects(bool) = 0; |
| |
| // Scheduling ----------------------------------------------------------- |
| |
| virtual PageScheduler* Scheduler() const = 0; |
| |
| // Visibility ----------------------------------------------------------- |
| |
| // Sets the visibility of the WebView. |
| virtual void SetIsHidden(bool hidden, bool is_initial_state) = 0; |
| virtual bool IsHidden() = 0; |
| |
| // FrameOverlay ---------------------------------------------------------- |
| |
| // Overlay this WebView with a solid color. |
| virtual void SetMainFrameOverlayColor(SkColor) = 0; |
| |
| // Page Importance Signals ---------------------------------------------- |
| |
| virtual WebPageImportanceSignals* PageImportanceSignals() { return nullptr; } |
| |
| // i18n ----------------------------------------------------------------- |
| |
| // Inform the WebView that the accept languages have changed. |
| // If the WebView wants to get the accept languages value, it will have |
| // to call the WebViewClient::acceptLanguages(). |
| virtual void AcceptLanguagesChanged() = 0; |
| |
| // Lifecycle state ------------------------------------------------------ |
| |
| // Freezes or unfreezes the page and all the local frames. |
| virtual void SetPageFrozen(bool frozen) = 0; |
| |
| // Testing functionality for TestRunner --------------------------------- |
| |
| // Force the webgl context to fail so that webglcontextcreationerror |
| // event gets generated/tested. |
| virtual void ForceNextWebGLContextCreationToFail() = 0; |
| |
| // Force the drawing buffer used by webgl contexts to fail so that the webgl |
| // context's ability to deal with that failure gracefully can be tested. |
| virtual void ForceNextDrawingBufferCreationToFail() = 0; |
| |
| // Autoplay configuration ----------------------------------------------- |
| |
| // Sets the autoplay flags for this webview's page. |
| // The valid flags are defined in |
| // third_party/blink/public/platform/autoplay.mojom |
| virtual void AddAutoplayFlags(int32_t flags) = 0; |
| virtual void ClearAutoplayFlags() = 0; |
| virtual int32_t AutoplayFlagsForTest() = 0; |
| |
| // Suspend and resume --------------------------------------------------- |
| |
| // Pausing and unpausing current scheduled tasks. |
| virtual void PausePageScheduledTasks(bool paused) = 0; |
| |
| // TODO(lfg): Remove this once the refactor of WebView/WebWidget is |
| // completed. |
| virtual WebWidget* MainFrameWidget() = 0; |
| |
| protected: |
| ~WebView() = default; |
| }; |
| |
| } // namespace blink |
| |
| #endif |