blob: 611a2f6443a954f984e11c4cf84991c60f1ea08a [file] [log] [blame]
// Copyright 2014 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.
#include <memory>
#include <set>
#include "base/callback.h"
#include "mojo/public/cpp/bindings/scoped_interface_endpoint_handle.h"
#include "third_party/blink/public/common/feature_policy/feature_policy.h"
#include "third_party/blink/public/common/frame/sandbox_flags.h"
#include "third_party/blink/public/mojom/ad_tagging/ad_frame.mojom-shared.h"
#include "third_party/blink/public/mojom/commit_result/commit_result.mojom-shared.h"
#include "third_party/blink/public/mojom/fetch/fetch_api_request.mojom-shared.h"
#include "third_party/blink/public/mojom/frame/lifecycle.mojom-shared.h"
#include "third_party/blink/public/mojom/selection_menu/selection_menu_behavior.mojom-shared.h"
#include "third_party/blink/public/platform/task_type.h"
#include "third_party/blink/public/platform/web_focus_type.h"
#include "third_party/blink/public/platform/web_size.h"
#include "third_party/blink/public/platform/web_url_error.h"
#include "third_party/blink/public/platform/web_url_request.h"
#include "third_party/blink/public/web/web_document_loader.h"
#include "third_party/blink/public/web/web_frame.h"
#include "third_party/blink/public/web/web_frame_load_type.h"
#include "third_party/blink/public/web/web_ime_text_span.h"
#include "third_party/blink/public/web/web_navigation_params.h"
#include "third_party/blink/public/web/web_text_direction.h"
#include "v8/include/v8.h"
namespace blink {
class FrameScheduler;
class InterfaceRegistry;
class WebAssociatedURLLoader;
class WebAutofillClient;
class WebContentCaptureClient;
class WebContentSettingsClient;
class WebDocument;
class WebDoubleSize;
class WebDOMEvent;
class WebLocalFrameClient;
class WebFrameWidget;
class WebInputMethodController;
class WebPerformance;
class WebRange;
class WebSecurityOrigin;
class WebScriptExecutionCallback;
class WebSpellCheckPanelHostClient;
class WebString;
class WebTextCheckClient;
class WebURL;
class WebView;
enum class WebTreeScopeType;
struct TransferableMessage;
struct WebAssociatedURLLoaderOptions;
struct WebConsoleMessage;
struct WebContentSecurityPolicyViolation;
struct WebIsolatedWorldInfo;
struct WebMediaPlayerAction;
struct WebPoint;
struct WebPrintParams;
struct WebPrintPresetOptions;
struct WebScriptSource;
struct WebSourceLocation;
// Interface for interacting with in process frames. This contains methods that
// require interacting with a frame's document.
// FIXME: Move lots of methods from WebFrame in here.
class WebLocalFrame : public WebFrame {
// Creates a main local frame for the WebView. Can only be invoked when no
// main frame exists yet. Call Close() to release the returned frame.
// WebLocalFrameClient may not be null.
// TODO(dcheng): The argument order should be more consistent with
// CreateLocalChild() and CreateRemoteChild() in WebRemoteFrame... but it's so
// painful...
BLINK_EXPORT static WebLocalFrame* CreateMainFrame(
WebFrame* opener = nullptr,
const WebString& name = WebString(),
WebSandboxFlags = WebSandboxFlags::kNone,
const FeaturePolicy::FeatureState& opener_feature_state =
// Used to create a provisional local frame. Currently, it's possible for a
// provisional navigation not to commit (i.e. it might turn into a download),
// but this can only be determined by actually trying to load it. The loading
// process depends on having a corresponding LocalFrame in Blink to hold all
// the pending state.
// When a provisional frame is first created, it is only partially attached to
// the frame tree. This means that though a provisional frame might have a
// frame owner, the frame owner's content frame does not point back at the
// provisional frame. Similarly, though a provisional frame may have a parent
// frame pointer, the parent frame's children list will not contain the
// provisional frame. Thus, a provisional frame is invisible to the rest of
// Blink unless the navigation commits and the provisional frame is fully
// attached to the frame tree by calling Swap(). It swaps with the
// |previous_web_frame|.
// Otherwise, if the load should not commit, call Detach() to discard the
// frame.
BLINK_EXPORT static WebLocalFrame* CreateProvisional(
WebFrame* previous_web_frame,
// Creates a new local child of this frame. Similar to the other methods that
// create frames, the returned frame should be freed by calling Close() when
// it's no longer needed.
virtual WebLocalFrame* CreateLocalChild(WebTreeScopeType,
mojo::ScopedMessagePipeHandle) = 0;
// Returns the WebFrame associated with the current V8 context. This
// function can return 0 if the context is associated with a Document that
// is not currently being displayed in a Frame.
BLINK_EXPORT static WebLocalFrame* FrameForCurrentContext();
// Returns the frame corresponding to the given context. This can return 0
// if the context is detached from the frame, or if the context doesn't
// correspond to a frame (e.g., workers).
BLINK_EXPORT static WebLocalFrame* FrameForContext(v8::Local<v8::Context>);
// Returns the frame inside a given frame or iframe element. Returns 0 if
// the given element is not a frame, iframe or if the frame is empty.
BLINK_EXPORT static WebLocalFrame* FromFrameOwnerElement(const WebElement&);
virtual WebLocalFrameClient* Client() const = 0;
// Initialization ---------------------------------------------------------
virtual void SetAutofillClient(WebAutofillClient*) = 0;
virtual WebAutofillClient* AutofillClient() = 0;
virtual void SetContentCaptureClient(WebContentCaptureClient*) = 0;
virtual WebContentCaptureClient* ContentCaptureClient() const = 0;
// Closing -------------------------------------------------------------
// Runs unload handlers for this frame.
virtual void DispatchUnloadEvent() = 0;
// Basic properties ---------------------------------------------------
// The urls of the given combination types of favicon (if any) specified by
// the document loaded in this frame. The iconTypesMask is a bit-mask of
// WebIconURL::Type values, used to select from the available set of icon
// URLs
virtual WebVector<WebIconURL> IconURLs(int icon_types_mask) const = 0;
virtual WebDocument GetDocument() const = 0;
// The name of this frame. If no name is given, empty string is returned.
virtual WebString AssignedName() const = 0;
// Sets the name of this frame.
virtual void SetName(const WebString&) = 0;
// Notifies this frame about a user activation from the browser side.
virtual void NotifyUserActivation() = 0;
// Hierarchy ----------------------------------------------------------
// Returns true if the current frame is a local root.
virtual bool IsLocalRoot() const = 0;
// Returns true if the current frame is a provisional frame.
// TODO( provisional frames are a hack that should
// be removed.
virtual bool IsProvisional() const = 0;
// Get the highest-level LocalFrame in this frame's in-process subtree.
virtual WebLocalFrame* LocalRoot() = 0;
// Returns the WebFrameWidget associated with this frame if there is one or
// nullptr otherwise.
// TODO(dcheng): The behavior of this will be changing to always return a
// WebFrameWidget. Use IsLocalRoot() if it's important to tell if a frame is a
// local root.
virtual WebFrameWidget* FrameWidget() const = 0;
// Returns the frame identified by the given name. This method supports
// pseudo-names like _self, _top, and _blank and otherwise performs the same
// kind of lookup what |, name)| would in Javascript.
virtual WebFrame* FindFrameByName(const WebString& name) = 0;
// Navigation Ping --------------------------------------------------------
virtual void SendPings(const WebURL& destination_url) = 0;
// Navigation ----------------------------------------------------------
// Start reloading the current document.
// Note: StartReload() will be deprecated, use StartNavigation() instead.
virtual void StartReload(WebFrameLoadType) = 0;
// Start navigation to the given URL.
virtual void StartNavigation(const WebURLRequest&) = 0;
// Returns the document loader that is currently loading. May be null.
// TODO(dgozman): move this to WebNavigationControl.
virtual WebDocumentLoader* GetProvisionalDocumentLoader() const = 0;
// View-source rendering mode. Set this before loading an URL to cause
// it to be rendered in view-source mode.
virtual void EnableViewSourceMode(bool) = 0;
virtual bool IsViewSourceModeEnabled() const = 0;
// Returns the document loader that is currently loaded.
virtual WebDocumentLoader* GetDocumentLoader() const = 0;
// Called when a navigation is blocked because a Content Security Policy (CSP)
// is infringed.
virtual void ReportContentSecurityPolicyViolation(
const blink::WebContentSecurityPolicyViolation&) = 0;
// Sets the referrer for the given request to be the specified URL or
// if that is null, then it sets the referrer to the referrer that the
// frame would use for subresources. NOTE: This method also filters
// out invalid referrers (e.g., it is invalid to send a HTTPS URL as
// the referrer for a HTTP request).
virtual void SetReferrerForRequest(WebURLRequest&, const WebURL&) = 0;
// Navigation State -------------------------------------------------------
// Returns true if the current frame's load event has not completed.
bool IsLoading() const override = 0;
// Returns true if there is a pending redirect or location change
// within specified interval (in seconds). This could be caused by:
// * an HTTP Refresh header
// * an X-Frame-Options header
// * the respective http-equiv meta tags
// * window.location value being mutated
// * CSP policy block
// * reload
// * form submission
virtual bool IsNavigationScheduledWithin(
double interval_in_seconds) const = 0;
// Reports a list of unique blink::WebFeature values representing
// Blink features used, performed or encountered by the browser during the
// current page load happening on the frame.
virtual void BlinkFeatureUsageReport(const std::set<int>& features) = 0;
// Informs the renderer that mixed content was found externally regarding this
// frame. Currently only the the browser process can do so. The included data
// is used for instance to report to the CSP policy and to log to the frame
// console.
virtual void MixedContentFound(const WebURL& main_resource_url,
const WebURL& mixed_content_url,
bool was_allowed,
bool had_redirect,
const WebSourceLocation&) = 0;
// Orientation Changes ----------------------------------------------------
// Notify the frame that the screen orientation has changed.
virtual void SendOrientationChangeEvent() = 0;
// Printing ------------------------------------------------------------
// Returns true on success and sets the out parameter to the print preset
// options for the document.
virtual bool GetPrintPresetOptionsForPlugin(const WebNode&,
WebPrintPresetOptions*) = 0;
// CSS3 Paged Media ----------------------------------------------------
// Returns true if page box (margin boxes and page borders) is visible.
virtual bool IsPageBoxVisible(int page_index) = 0;
// Returns true if the page style has custom size information.
virtual bool HasCustomPageSizeStyle(int page_index) = 0;
// Returns the preferred page size and margins in pixels, assuming 96
// pixels per inch. pageSize, marginTop, marginRight, marginBottom,
// marginLeft must be initialized to the default values that are used if
// auto is specified.
virtual void PageSizeAndMarginsInPixels(int page_index,
WebDoubleSize& page_size,
int& margin_top,
int& margin_right,
int& margin_bottom,
int& margin_left) = 0;
// Returns the value for a page property that is only defined when printing.
// printBegin must have been called before this method.
virtual WebString PageProperty(const WebString& property_name,
int page_index) = 0;
// Scripting --------------------------------------------------------------
// Executes script in the context of the current page.
virtual void ExecuteScript(const WebScriptSource&) = 0;
// Executes JavaScript in a new world associated with the web frame.
// The script gets its own global scope and its own prototypes for
// intrinsic JavaScript objects (String, Array, and so-on). It also
// gets its own wrappers for all DOM nodes and DOM constructors.
// worldID must be > 0 (as 0 represents the main world).
// worldID must be < kEmbedderWorldIdLimit, high number used internally.
virtual void ExecuteScriptInIsolatedWorld(int world_id,
const WebScriptSource&) = 0;
// worldID must be > 0 (as 0 represents the main world).
// worldID must be < kEmbedderWorldIdLimit, high number used internally.
// DEPRECATED: Use WebLocalFrame::requestExecuteScriptInIsolatedWorld.
WARN_UNUSED_RESULT virtual v8::Local<v8::Value>
ExecuteScriptInIsolatedWorldAndReturnValue(int world_id,
const WebScriptSource&) = 0;
// Sets up an isolated world by associating a |world_id| with |info|.
// worldID must be > 0 (as 0 represents the main world).
// worldID must be < kEmbedderWorldIdLimit, high number used internally.
virtual void SetIsolatedWorldInfo(int world_id,
const WebIsolatedWorldInfo& info) = 0;
// Executes script in the context of the current page and returns the value
// that the script evaluated to.
// DEPRECATED: Use WebLocalFrame::requestExecuteScriptAndReturnValue.
virtual v8::Local<v8::Value> ExecuteScriptAndReturnValue(
const WebScriptSource&) = 0;
// Call the function with the given receiver and arguments, bypassing
// canExecute().
virtual v8::MaybeLocal<v8::Value> CallFunctionEvenIfScriptDisabled(
int argc,
v8::Local<v8::Value> argv[]) = 0;
// Returns the V8 context for associated with the main world and this
// frame. There can be many V8 contexts associated with this frame, one for
// each isolated world and one for the main world. If you don't know what
// the "main world" or an "isolated world" is, then you probably shouldn't
// be calling this API.
virtual v8::Local<v8::Context> MainWorldScriptContext() const = 0;
// Executes script in the context of the current page and returns the value
// that the script evaluated to with callback. Script execution can be
// suspend.
// DEPRECATED: Prefer requestExecuteScriptInIsolatedWorld().
virtual void RequestExecuteScriptAndReturnValue(
const WebScriptSource&,
bool user_gesture,
WebScriptExecutionCallback*) = 0;
// Requests execution of the given function, but allowing for script
// suspension and asynchronous execution.
virtual void RequestExecuteV8Function(v8::Local<v8::Context>,
v8::Local<v8::Value> receiver,
int argc,
v8::Local<v8::Value> argv[],
WebScriptExecutionCallback*) = 0;
enum class PausableTaskResult {
// The context was invalid or destroyed.
// Script is not paused.
using PausableTaskCallback = base::OnceCallback<void(PausableTaskResult)>;
// Queues a callback to run script when the context is not paused, e.g. for a
// modal JS dialog or window.print(). This callback can run immediately if the
// context is not paused. If the context is invalidated before becoming
// unpaused, the callback will be run with a kContextInvalidOrDestroyed value.
// This asserts that the context is valid at the time of this
// call.
virtual void PostPausableTask(PausableTaskCallback) = 0;
enum ScriptExecutionType {
// Execute script synchronously, unless the page is suspended.
// Execute script asynchronously.
// Execute script asynchronously, blocking the window.onload event.
// worldID must be > 0 (as 0 represents the main world).
// worldID must be < kEmbedderWorldIdLimit, high number used internally.
virtual void RequestExecuteScriptInIsolatedWorld(
int world_id,
const WebScriptSource* source_in,
unsigned num_sources,
bool user_gesture,
WebScriptExecutionCallback*) = 0;
// Logs to the console associated with this frame.
virtual void AddMessageToConsole(const WebConsoleMessage&) = 0;
// Expose modal dialog methods to avoid having to go through JavaScript.
virtual void Alert(const WebString& message) = 0;
virtual bool Confirm(const WebString& message) = 0;
virtual WebString Prompt(const WebString& message,
const WebString& default_value) = 0;
// Debugging -----------------------------------------------------------
virtual void BindDevToolsAgent(
mojo::ScopedInterfaceEndpointHandle devtools_agent_host_ptr_info,
mojo::ScopedInterfaceEndpointHandle devtools_agent_request) = 0;
// Editing -------------------------------------------------------------
virtual void SetMarkedText(const WebString& text,
unsigned location,
unsigned length) = 0;
virtual void UnmarkText() = 0;
virtual bool HasMarkedText() const = 0;
virtual WebRange MarkedRange() const = 0;
// Returns the text range rectangle in the viepwort coordinate space.
virtual bool FirstRectForCharacterRange(unsigned location,
unsigned length,
WebRect&) const = 0;
// Returns the index of a character in the Frame's text stream at the given
// point. The point is in the viewport coordinate space. Will return
// WTF::notFound if the point is invalid.
virtual size_t CharacterIndexForPoint(const WebPoint&) const = 0;
// Supports commands like Undo, Redo, Cut, Copy, Paste, SelectAll,
// Unselect, etc. See EditorCommand.cpp for the full list of supported
// commands.
virtual bool ExecuteCommand(const WebString&) = 0;
virtual bool ExecuteCommand(const WebString&, const WebString& value) = 0;
virtual bool IsCommandEnabled(const WebString&) const = 0;
// Returns the text direction at the start and end bounds of the current
// selection. If the selection range is empty, it returns false.
virtual bool SelectionTextDirection(WebTextDirection& start,
WebTextDirection& end) const = 0;
// Returns true if the selection range is nonempty and its anchor is first
// (i.e its anchor is its start).
virtual bool IsSelectionAnchorFirst() const = 0;
// Changes the text direction of the selected input node.
virtual void SetTextDirection(WebTextDirection) = 0;
// Selection -----------------------------------------------------------
virtual bool HasSelection() const = 0;
virtual WebRange SelectionRange() const = 0;
virtual WebString SelectionAsText() const = 0;
virtual WebString SelectionAsMarkup() const = 0;
// Expands the selection to a word around the caret and returns
// true. Does nothing and returns false if there is no caret or
// there is ranged selection.
virtual bool SelectWordAroundCaret() = 0;
// DEPRECATED: Use moveRangeSelection.
virtual void SelectRange(const WebPoint& base, const WebPoint& extent) = 0;
enum HandleVisibilityBehavior {
// Hide handle(s) in the new selection.
// Show handle(s) in the new selection.
// Keep the current handle visibility.
virtual void SelectRange(const WebRange&,
mojom::SelectionMenuBehavior) = 0;
virtual WebString RangeAsText(const WebRange&) = 0;
// Move the current selection to the provided viewport point/points. If the
// current selection is editable, the new selection will be restricted to
// the root editable element.
// |TextGranularity| represents character wrapping granularity. If
// WordGranularity is set, WebFrame extends selection to wrap word.
virtual void MoveRangeSelection(
const WebPoint& base,
const WebPoint& extent,
WebFrame::TextGranularity = kCharacterGranularity) = 0;
virtual void MoveCaretSelection(const WebPoint&) = 0;
virtual bool SetEditableSelectionOffsets(int start, int end) = 0;
virtual bool SetCompositionFromExistingText(
int composition_start,
int composition_end,
const WebVector<WebImeTextSpan>& ime_text_spans) = 0;
virtual void ExtendSelectionAndDelete(int before, int after) = 0;
virtual void SetCaretVisible(bool) = 0;
// Moves the selection extent point. This function does not allow the
// selection to collapse. If the new extent is set to the same position as
// the current base, this function will do nothing.
virtual void MoveRangeSelectionExtent(const WebPoint&) = 0;
// Replaces the selection with the input string.
virtual void ReplaceSelection(const WebString&) = 0;
// Deletes text before and after the current cursor position, excluding the
// selection. The lengths are supplied in UTF-16 Code Unit, not in code points
// or in glyphs.
virtual void DeleteSurroundingText(int before, int after) = 0;
// A variant of deleteSurroundingText(int, int). Major differences are:
// 1. The lengths are supplied in code points, not in UTF-16 Code Unit or in
// glyphs.
// 2. This method does nothing if there are one or more invalid surrogate
// pairs in the requested range.
virtual void DeleteSurroundingTextInCodePoints(int before, int after) = 0;
virtual void ExtractSmartClipData(WebRect rect_in_viewport,
WebString& clip_text,
WebString& clip_html,
WebRect& clip_rect) = 0;
// Spell-checking support -------------------------------------------------
virtual void SetTextCheckClient(WebTextCheckClient*) = 0;
virtual void SetSpellCheckPanelHostClient(WebSpellCheckPanelHostClient*) = 0;
virtual WebSpellCheckPanelHostClient* SpellCheckPanelHostClient() const = 0;
virtual void ReplaceMisspelledRange(const WebString&) = 0;
virtual void RemoveSpellingMarkers() = 0;
virtual void RemoveSpellingMarkersUnderWords(
const WebVector<WebString>& words) = 0;
// Content Settings -------------------------------------------------------
virtual void SetContentSettingsClient(WebContentSettingsClient*) = 0;
// Image reload -----------------------------------------------------------
// If the provided node is an image, reload the image disabling Lo-Fi.
virtual void ReloadImage(const WebNode&) = 0;
// Reloads all the Lo-Fi images in this WebLocalFrame. Ignores the cache and
// reloads from the network.
virtual void ReloadLoFiImages() = 0;
// Feature usage logging --------------------------------------------------
virtual void DidCallAddSearchProvider() = 0;
virtual void DidCallIsSearchProviderInstalled() = 0;
// Iframe sandbox ---------------------------------------------------------
// Returns the effective sandbox flags which are inherited from their parent
// frame.
virtual WebSandboxFlags EffectiveSandboxFlags() const = 0;
// Find-in-page -----------------------------------------------------------
// Searches a frame for a given string. Only used for testing.
// If a match is found, this function will select it (scrolling down to
// make it visible if needed) and fill in selectionRect with the
// location of where the match was found (in window coordinates).
// If no match is found, this function clears all tickmarks and
// highlighting.
// Returns true if the search string was found, false otherwise.
virtual bool FindForTesting(int identifier,
const WebString& search_text,
bool match_case,
bool forward,
bool find_next,
bool force,
bool wrap_within_frame) = 0;
// Set the tickmarks for the frame. This will override the default tickmarks
// generated by find results. If this is called with an empty array, the
// default behavior will be restored.
virtual void SetTickmarks(const WebVector<WebRect>&) = 0;
// Context menu -----------------------------------------------------------
// Returns the node that the context menu opened over.
virtual WebNode ContextMenuNode() const = 0;
// Copy to the clipboard the image located at a particular point in visual
// viewport coordinates.
virtual void CopyImageAt(const WebPoint&) = 0;
// Save as the image located at a particular point in visual viewport
// coordinates.
virtual void SaveImageAt(const WebPoint&) = 0;
// Events --------------------------------------------------------------
// Dispatches a message event on the current DOMWindow in this WebFrame.
virtual void DispatchMessageEventWithOriginCheck(
const WebSecurityOrigin& intended_target_origin,
const WebDOMEvent&,
bool has_user_gesture) = 0;
// TEMP: Usage count for chrome.loadtimes deprecation.
// This will be removed following the deprecation.
virtual void UsageCountChromeLoadTimes(const WebString& metric) = 0;
// Dispatches an event when a Portal gets activated.
virtual void OnPortalActivated(TransferableMessage data) = 0;
// Scheduling ---------------------------------------------------------------
virtual FrameScheduler* Scheduler() const = 0;
// Task queues --------------------------------------------------------------
// Returns frame-specific task runner to run tasks of this type on.
// They have the same lifetime as the frame.
virtual scoped_refptr<base::SingleThreadTaskRunner> GetTaskRunner(
TaskType) = 0;
// Returns the WebInputMethodController associated with this local frame.
virtual WebInputMethodController* GetInputMethodController() = 0;
// Loading ------------------------------------------------------------------
// Returns an AssociatedURLLoader that is associated with this frame. The
// loader will, for example, be cancelled when WebFrame::stopLoading is
// called.
// FIXME: stopLoading does not yet cancel an associated loader!!
virtual WebAssociatedURLLoader* CreateAssociatedURLLoader(
const WebAssociatedURLLoaderOptions&) = 0;
// Check whether loading has completed based on subframe state, etc.
virtual void CheckCompleted() = 0;
// Geometry -----------------------------------------------------------------
// NOTE: These routines do not force page layout so their results may
// not be accurate if the page layout is out-of-date.
// The scroll offset from the top-left corner of the frame in pixels.
virtual WebSize GetScrollOffset() const = 0;
virtual void SetScrollOffset(const WebSize&) = 0;
// The size of the document in this frame.
virtual WebSize DocumentSize() const = 0;
// Returns true if the contents (minus scrollbars) has non-zero area.
virtual bool HasVisibleContent() const = 0;
// Printing ------------------------------------------------------------
// Dispatch |beforeprint| event, and execute event handlers. They might detach
// this frame from the owner WebView.
// This function should be called before pairs of PrintBegin() and PrintEnd().
virtual void DispatchBeforePrintEvent() = 0;
// Reformats the WebFrame for printing. WebPrintParams specifies the printable
// content size, paper size, printable area size, printer DPI and print
// scaling option. If constrainToNode node is specified, then only the given
// node is printed (for now only plugins are supported), instead of the entire
// frame.
// Returns the number of pages that can be printed at the given
// page size.
virtual int PrintBegin(const WebPrintParams&,
const WebNode& constrain_to_node = WebNode()) = 0;
// Returns the page shrinking factor calculated by webkit (usually
// between 1/1.33 and 1/2). Returns 0 if the page number is invalid or
// not in printing mode.
virtual float GetPrintPageShrink(int page) = 0;
// Prints one page, and returns the calculated page shrinking factor
// (usually between 1/1.33 and 1/2). Returns 0 if the page number is
// invalid or not in printing mode.
virtual float PrintPage(int page_to_print, cc::PaintCanvas*) = 0;
// Reformats the WebFrame for screen display.
virtual void PrintEnd() = 0;
// Dispatch |afterprint| event, and execute event handlers. They might detach
// this frame from the owner WebView.
// This function should be called after pairs of PrintBegin() and PrintEnd().
virtual void DispatchAfterPrintEvent() = 0;
// Advance the focus of the WebView to next text input element from current
// input field wrt sequential navigation with TAB or Shift + TAB
// WebFocusTypeForward simulates TAB and WebFocusTypeBackward simulates
// Shift + TAB. (Will be extended to other form controls like select element,
// checkbox, radio etc.)
virtual void AdvanceFocusInForm(WebFocusType) = 0;
// Performance --------------------------------------------------------
virtual WebPerformance Performance() const = 0;
// Ad Tagging ---------------------------------------------------------
// True if the frame is thought (heuristically) to be created for
// advertising purposes.
virtual bool IsAdSubframe() const = 0;
// This setter is available in case the embedder has more information about
// whether or not the frame is an ad.
virtual void SetIsAdSubframe(blink::mojom::AdFrameType ad_frame_type) = 0;
// Testing ------------------------------------------------------------------
// Dumps the layer tree, used by the accelerated compositor, in
// text form. This is used only by web tests.
virtual WebString GetLayerTreeAsTextForTesting(
bool show_debug_info = false) const = 0;
// Prints the frame into the canvas, with page boundaries drawn as one pixel
// wide blue lines. This method exists to support web tests.
virtual void PrintPagesForTesting(cc::PaintCanvas*, const WebSize&) = 0;
// Returns the bounds rect for current selection. If selection is performed
// on transformed text, the rect will still bound the selection but will
// not be transformed itself. If no selection is present, the rect will be
// empty ((0,0), (0,0)).
virtual WebRect GetSelectionBoundsRectForTesting() const = 0;
// Performs the specified media player action on the media element at the
// given location.
virtual void PerformMediaPlayerAction(const WebPoint&,
const WebMediaPlayerAction&) = 0;
virtual void SetLifecycleState(mojom::FrameLifecycleState state) = 0;
explicit WebLocalFrame(WebTreeScopeType scope) : WebFrame(scope) {}
// Inherited from WebFrame, but intentionally hidden: it never makes sense
// to call these on a WebLocalFrame.
bool IsWebLocalFrame() const override = 0;
WebLocalFrame* ToWebLocalFrame() override = 0;
bool IsWebRemoteFrame() const override = 0;
WebRemoteFrame* ToWebRemoteFrame() override = 0;
} // namespace blink