mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
665 lines
22 KiB
JavaScript
665 lines
22 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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dump("### SelectionHandler.js loaded\n");
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var SelectionHandler = {
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init: function init() {
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this.type = kContentSelector;
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this.snap = true;
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addMessageListener("Browser:SelectionStart", this);
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addMessageListener("Browser:SelectionAttach", this);
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addMessageListener("Browser:SelectionEnd", this);
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addMessageListener("Browser:SelectionMoveStart", this);
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addMessageListener("Browser:SelectionMove", this);
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addMessageListener("Browser:SelectionMoveEnd", this);
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addMessageListener("Browser:SelectionUpdate", this);
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addMessageListener("Browser:SelectionClose", this);
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addMessageListener("Browser:SelectionCopy", this);
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addMessageListener("Browser:SelectionDebug", this);
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addMessageListener("Browser:CaretAttach", this);
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addMessageListener("Browser:CaretMove", this);
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addMessageListener("Browser:CaretUpdate", this);
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addMessageListener("Browser:SelectionSwitchMode", this);
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addMessageListener("Browser:RepositionInfoRequest", this);
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addMessageListener("Browser:SelectionHandlerPing", this);
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},
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shutdown: function shutdown() {
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removeMessageListener("Browser:SelectionStart", this);
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removeMessageListener("Browser:SelectionAttach", this);
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removeMessageListener("Browser:SelectionEnd", this);
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removeMessageListener("Browser:SelectionMoveStart", this);
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removeMessageListener("Browser:SelectionMove", this);
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removeMessageListener("Browser:SelectionMoveEnd", this);
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removeMessageListener("Browser:SelectionUpdate", this);
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removeMessageListener("Browser:SelectionClose", this);
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removeMessageListener("Browser:SelectionCopy", this);
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removeMessageListener("Browser:SelectionDebug", this);
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removeMessageListener("Browser:CaretAttach", this);
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removeMessageListener("Browser:CaretMove", this);
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removeMessageListener("Browser:CaretUpdate", this);
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removeMessageListener("Browser:SelectionSwitchMode", this);
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removeMessageListener("Browser:RepositionInfoRequest", this);
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removeMessageListener("Browser:SelectionHandlerPing", this);
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},
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sendAsync: function sendAsync(aMsg, aJson) {
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sendAsyncMessage(aMsg, aJson);
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},
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/*************************************************
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* Browser event handlers
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*/
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/*
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* Selection start event handler
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*/
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_onSelectionStart: function _onSelectionStart(aX, aY) {
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// Init content window information
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if (!this._initTargetInfo(aX, aY)) {
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this._onFail("failed to get target information");
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return;
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}
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// Clear any existing selection from the document
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let selection = this._contentWindow.getSelection();
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selection.removeAllRanges();
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// Set our initial selection, aX and aY should be in client coordinates.
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let framePoint = this._clientPointToFramePoint({ xPos: aX, yPos: aY });
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if (!this._domWinUtils.selectAtPoint(framePoint.xPos, framePoint.yPos,
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Ci.nsIDOMWindowUtils.SELECT_WORDNOSPACE)) {
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this._onFail("failed to set selection at point");
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return;
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}
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// Update the position of our selection monocles
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this._updateSelectionUI("start", true, true);
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},
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_onSelectionAttach: function _onSelectionAttach(aX, aY) {
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// Init content window information
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if (!this._initTargetInfo(aX, aY)) {
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this._onFail("failed to get frame offset");
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return;
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}
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// Update the position of our selection monocles
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this._updateSelectionUI("start", true, true);
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},
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/*
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* Switch selection modes. Currently we only support switching
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* from "caret" to "selection".
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*/
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_onSwitchMode: function _onSwitchMode(aMode, aMarker, aX, aY) {
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if (aMode != "selection") {
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this._onFail("unsupported mode switch");
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return;
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}
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// Sanity check to be sure we are initialized
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if (!this._targetElement) {
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this._onFail("not initialized");
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return;
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}
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// Similar to _onSelectionStart - we need to create initial selection
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// but without the initialization bits.
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let framePoint = this._clientPointToFramePoint({ xPos: aX, yPos: aY });
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if (!this._domWinUtils.selectAtPoint(framePoint.xPos, framePoint.yPos,
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Ci.nsIDOMWindowUtils.SELECT_CHARACTER)) {
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this._onFail("failed to set selection at point");
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return;
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}
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// We bail if things get out of sync here implying we missed a message.
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this._selectionMoveActive = true;
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// Update the position of the selection marker that is *not*
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// being dragged.
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this._updateSelectionUI("update", aMarker == "end", aMarker == "start");
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},
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/*
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* Selection monocle start move event handler
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*/
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_onSelectionMoveStart: function _onSelectionMoveStart(aMsg) {
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if (!this._contentWindow) {
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this._onFail("_onSelectionMoveStart was called without proper view set up");
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return;
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}
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if (this._selectionMoveActive) {
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this._onFail("mouse is already down on drag start?");
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return;
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}
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// We bail if things get out of sync here implying we missed a message.
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this._selectionMoveActive = true;
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if (this._targetIsEditable) {
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// If we're coming out of an out-of-bounds scroll, the node the user is
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// trying to drag may be hidden (the monocle will be pegged to the edge
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// of the edit). Make sure the node the user wants to move is visible
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// and has focus.
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this._updateInputFocus(aMsg.change);
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}
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// Update the position of our selection monocles
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this._updateSelectionUI("update", true, true);
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},
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/*
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* Selection monocle move event handler
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*/
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_onSelectionMove: function _onSelectionMove(aMsg) {
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if (!this._contentWindow) {
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this._onFail("_onSelectionMove was called without proper view set up");
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return;
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}
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if (!this._selectionMoveActive) {
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this._onFail("mouse isn't down for drag move?");
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return;
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}
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// Update selection in the doc
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let pos = null;
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if (aMsg.change == "start") {
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pos = aMsg.start;
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} else {
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pos = aMsg.end;
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}
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this._handleSelectionPoint(aMsg.change, pos, false);
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},
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/*
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* Selection monocle move finished event handler
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*/
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_onSelectionMoveEnd: function _onSelectionMoveComplete(aMsg) {
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if (!this._contentWindow) {
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this._onFail("_onSelectionMove was called without proper view set up");
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return;
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}
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if (!this._selectionMoveActive) {
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this._onFail("mouse isn't down for drag move?");
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return;
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}
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// Update selection in the doc
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let pos = null;
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if (aMsg.change == "start") {
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pos = aMsg.start;
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} else {
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pos = aMsg.end;
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}
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this._handleSelectionPoint(aMsg.change, pos, true);
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this._selectionMoveActive = false;
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// _handleSelectionPoint may set a scroll timer, so this must
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// be reset after the last call.
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this._clearTimers();
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// Update the position of our selection monocles
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this._updateSelectionUI("end", true, true);
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},
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/*
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* _onCaretAttach - called by SelectionHelperUI when the user taps in a
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* form input. Initializes SelectionHandler, updates the location of the
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* caret, and messages back with current monocle position information.
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*
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* @param aX, aY tap location in client coordinates.
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*/
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_onCaretAttach: function _onCaretAttach(aX, aY) {
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// Init content window information
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if (!this._initTargetInfo(aX, aY)) {
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this._onFail("failed to get target information");
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return;
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}
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// This should never happen, but we check to make sure
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if (!this._targetIsEditable) {
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this._onFail("Coordiates didn't find a text input element.");
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return;
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}
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// Locate and sanity check the caret position
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let selection = this._getSelection();
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if (!selection || !selection.isCollapsed) {
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this._onFail("No selection or selection is not collapsed.");
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return;
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}
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// Update the position of our selection monocles
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this._updateSelectionUI("caret", false, false, true);
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},
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/*
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* Selection copy event handler
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*
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* Check to see if the incoming click was on our selection rect.
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* if it was, copy to the clipboard. Incoming coordinates are
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* content values.
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*/
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_onSelectionCopy: function _onSelectionCopy(aMsg) {
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let tap = {
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xPos: aMsg.xPos,
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yPos: aMsg.yPos,
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};
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let tapInSelection = (tap.xPos > this._cache.selection.left &&
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tap.xPos < this._cache.selection.right) &&
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(tap.yPos > this._cache.selection.top &&
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tap.yPos < this._cache.selection.bottom);
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// Util.dumpLn(tapInSelection,
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// tap.xPos, tap.yPos, "|", this._cache.selection.left,
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// this._cache.selection.right, this._cache.selection.top,
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// this._cache.selection.bottom);
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let success = false;
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let selectedText = this._getSelectedText();
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if (tapInSelection && selectedText.length) {
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let clipboard = Cc["@mozilla.org/widget/clipboardhelper;1"]
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.getService(Ci.nsIClipboardHelper);
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clipboard.copyString(selectedText, this._contentWindow.document);
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success = true;
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}
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sendSyncMessage("Content:SelectionCopied", { succeeded: success });
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},
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/*
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* Selection close event handler
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*
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* @param aClearSelection requests that selection be cleared.
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*/
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_onSelectionClose: function _onSelectionClose(aClearSelection) {
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if (aClearSelection) {
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this._clearSelection();
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}
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this.closeSelection();
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},
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/*
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* Called any time SelectionHelperUI would like us to
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* recalculate the selection bounds.
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*/
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_onSelectionUpdate: function _onSelectionUpdate() {
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if (!this._contentWindow) {
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this._onFail("_onSelectionUpdate was called without proper view set up");
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return;
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}
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// Update the position of our selection monocles
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this._updateSelectionUI("update", true, true);
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},
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/*
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* Called if for any reason we fail during the selection
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* process. Cancels the selection.
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*/
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_onFail: function _onFail(aDbgMessage) {
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if (aDbgMessage && aDbgMessage.length > 0)
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Util.dumpLn(aDbgMessage);
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this.sendAsync("Content:SelectionFail");
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this._clearSelection();
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this.closeSelection();
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},
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/*
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* _repositionInfoRequest - fired at us by ContentAreaObserver when the
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* soft keyboard is being displayed. CAO wants to make a decision about
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* whether the browser deck needs repositioning.
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*/
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_repositionInfoRequest: function _repositionInfoRequest(aJsonMsg) {
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if (!this.isActive) {
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Util.dumpLn("unexpected: repositionInfoRequest but selection isn't active.");
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this.sendAsync("Content:RepositionInfoResponse", { reposition: false });
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return;
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}
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if (!this.targetIsEditable) {
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Util.dumpLn("unexpected: repositionInfoRequest but targetIsEditable is false.");
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this.sendAsync("Content:RepositionInfoResponse", { reposition: false });
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}
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let result = this._calcNewContentPosition(aJsonMsg.viewHeight);
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// no repositioning needed
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if (result == 0) {
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this.sendAsync("Content:RepositionInfoResponse", { reposition: false });
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return;
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}
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this.sendAsync("Content:RepositionInfoResponse", {
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reposition: true,
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raiseContent: result,
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});
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},
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_onPing: function _onPing(aId) {
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this.sendAsync("Content:SelectionHandlerPong", { id: aId });
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},
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/*************************************************
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* Selection helpers
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*/
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/*
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* _clearSelection
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*
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* Clear existing selection if it exists and reset our internla state.
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*/
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_clearSelection: function _clearSelection() {
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this._clearTimers();
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if (this._contentWindow) {
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let selection = this._getSelection();
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if (selection)
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selection.removeAllRanges();
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} else {
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let selection = content.getSelection();
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if (selection)
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selection.removeAllRanges();
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}
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},
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/*
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* closeSelection
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*
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* Shuts SelectionHandler down.
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*/
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closeSelection: function closeSelection() {
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this._clearTimers();
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this._cache = null;
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this._contentWindow = null;
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this._targetElement = null;
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this._selectionMoveActive = false;
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this._contentOffset = null;
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this._domWinUtils = null;
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this._targetIsEditable = false;
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sendSyncMessage("Content:HandlerShutdown", {});
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},
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/*
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* Find content within frames - cache the target nsIDOMWindow,
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* client coordinate offset, target element, and dom utils interface.
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*/
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_initTargetInfo: function _initTargetInfo(aX, aY) {
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// getCurrentWindowAndOffset takes client coordinates
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let { element: element,
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contentWindow: contentWindow,
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offset: offset,
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utils: utils } =
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this.getCurrentWindowAndOffset(aX, aY);
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if (!contentWindow) {
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return false;
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}
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this._targetElement = element;
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this._contentWindow = contentWindow;
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this._contentOffset = offset;
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this._domWinUtils = utils;
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this._targetIsEditable = Util.isEditable(this._targetElement);
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return true;
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},
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/*
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* _calcNewContentPosition - calculates the distance the browser should be
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* raised to move the focused form input out of the way of the soft
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* keyboard.
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*
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* @param aNewViewHeight the new content view height
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* @return 0 if no positioning is required or a positive val equal to the
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* distance content should be raised to center the target element.
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*/
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_calcNewContentPosition: function _calcNewContentPosition(aNewViewHeight) {
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// We don't support this on non-editable elements
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if (!this._targetIsEditable) {
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return 0;
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}
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// If the bottom of the target bounds is higher than the new height,
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// there's no need to adjust. It will be above the keyboard.
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if (this._cache.element.bottom <= aNewViewHeight) {
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return 0;
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}
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// height of the target element
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let targetHeight = this._cache.element.bottom - this._cache.element.top;
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// height of the browser view.
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let viewBottom = content.innerHeight;
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// If the target is shorter than the new content height, we can go ahead
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// and center it.
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if (targetHeight <= aNewViewHeight) {
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// Try to center the element vertically in the new content area, but
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// don't position such that the bottom of the browser view moves above
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// the top of the chrome. We purposely do not resize the browser window
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// by making it taller when trying to center elements that are near the
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// lower bounds. This would trigger reflow which can cause content to
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// shift around.
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let splitMargin = Math.round((aNewViewHeight - targetHeight) * .5);
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let distanceToPageBounds = viewBottom - this._cache.element.bottom;
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let distanceFromChromeTop = this._cache.element.bottom - aNewViewHeight;
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let distanceToCenter =
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distanceFromChromeTop + Math.min(distanceToPageBounds, splitMargin);
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return distanceToCenter;
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}
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// Special case: we are dealing with an input that is taller than the
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// desired height of content. We need to center on the caret location.
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let rect =
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this._domWinUtils.sendQueryContentEvent(this._domWinUtils.QUERY_CARET_RECT,
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this._targetElement.selectionEnd,
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0, 0, 0);
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if (!rect || !rect.succeeded) {
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Util.dumpLn("no caret was present, unexpected.");
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return 0;
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}
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// Note sendQueryContentEvent with QUERY_CARET_RECT is really buggy. If it
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// can't find the exact location of the caret position it will "guess".
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// Sometimes this can put the result in unexpected locations.
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let caretLocation = Math.max(Math.min(Math.round(rect.top + (rect.height * .5)),
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viewBottom), 0);
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// Caret is above the bottom of the new view bounds, no need to shift.
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if (caretLocation <= aNewViewHeight) {
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return 0;
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}
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// distance from the top of the keyboard down to the caret location
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return caretLocation - aNewViewHeight;
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},
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/*************************************************
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* Events
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*/
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/*
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* Scroll + selection advancement timer when the monocle is
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* outside the bounds of an input control.
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*/
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scrollTimerCallback: function scrollTimerCallback() {
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let result = SelectionHandler.updateTextEditSelection();
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// Update monocle position and speed if we've dragged off to one side
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if (result.trigger) {
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SelectionHandler._updateSelectionUI("update", result.start, result.end);
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}
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},
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receiveMessage: function sh_receiveMessage(aMessage) {
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if (this._debugEvents && aMessage.name != "Browser:SelectionMove") {
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Util.dumpLn("SelectionHandler:", aMessage.name);
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}
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let json = aMessage.json;
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switch (aMessage.name) {
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case "Browser:SelectionStart":
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this._onSelectionStart(json.xPos, json.yPos);
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break;
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case "Browser:SelectionAttach":
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this._onSelectionAttach(json.xPos, json.yPos);
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break;
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case "Browser:CaretAttach":
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this._onCaretAttach(json.xPos, json.yPos);
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break;
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case "Browser:CaretMove":
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this._onCaretMove(json.caret.xPos, json.caret.yPos);
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break;
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case "Browser:CaretUpdate":
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this._onCaretPositionUpdate(json.caret.xPos, json.caret.yPos);
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break;
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case "Browser:SelectionSwitchMode":
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this._onSwitchMode(json.newMode, json.change, json.xPos, json.yPos);
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break;
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case "Browser:SelectionClose":
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this._onSelectionClose(json.clearSelection);
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break;
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case "Browser:SelectionMoveStart":
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this._onSelectionMoveStart(json);
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break;
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case "Browser:SelectionMove":
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this._onSelectionMove(json);
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break;
|
|
|
|
case "Browser:SelectionMoveEnd":
|
|
this._onSelectionMoveEnd(json);
|
|
break;
|
|
|
|
case "Browser:SelectionCopy":
|
|
this._onSelectionCopy(json);
|
|
break;
|
|
|
|
case "Browser:SelectionDebug":
|
|
this._onSelectionDebug(json);
|
|
break;
|
|
|
|
case "Browser:SelectionUpdate":
|
|
this._onSelectionUpdate();
|
|
break;
|
|
|
|
case "Browser:RepositionInfoRequest":
|
|
this._repositionInfoRequest(json);
|
|
break;
|
|
|
|
case "Browser:SelectionHandlerPing":
|
|
this._onPing(json.id);
|
|
break;
|
|
}
|
|
},
|
|
|
|
/*************************************************
|
|
* Utilities
|
|
*/
|
|
|
|
/*
|
|
* Retrieve the total offset from the window's origin to the sub frame
|
|
* element including frame and scroll offsets. The resulting offset is
|
|
* such that:
|
|
* sub frame coords + offset = root frame position
|
|
*/
|
|
getCurrentWindowAndOffset: function(x, y) {
|
|
// If the element at the given point belongs to another document (such
|
|
// as an iframe's subdocument), the element in the calling document's
|
|
// DOM (e.g. the iframe) is returned.
|
|
let utils = Util.getWindowUtils(content);
|
|
let element = utils.elementFromPoint(x, y, true, false);
|
|
let offset = { x:0, y:0 };
|
|
|
|
while (element && (element instanceof HTMLIFrameElement ||
|
|
element instanceof HTMLFrameElement)) {
|
|
// get the child frame position in client coordinates
|
|
let rect = element.getBoundingClientRect();
|
|
|
|
// calculate offsets for digging down into sub frames
|
|
// using elementFromPoint:
|
|
|
|
// Get the content scroll offset in the child frame
|
|
scrollOffset = ContentScroll.getScrollOffset(element.contentDocument.defaultView);
|
|
// subtract frame and scroll offset from our elementFromPoint coordinates
|
|
x -= rect.left + scrollOffset.x;
|
|
y -= rect.top + scrollOffset.y;
|
|
|
|
// calculate offsets we'll use to translate to client coords:
|
|
|
|
// add frame client offset to our total offset result
|
|
offset.x += rect.left;
|
|
offset.y += rect.top;
|
|
|
|
// get the frame's nsIDOMWindowUtils
|
|
utils = element.contentDocument
|
|
.defaultView
|
|
.QueryInterface(Ci.nsIInterfaceRequestor)
|
|
.getInterface(Ci.nsIDOMWindowUtils);
|
|
|
|
// retrieve the target element in the sub frame at x, y
|
|
element = utils.elementFromPoint(x, y, true, false);
|
|
}
|
|
|
|
if (!element)
|
|
return {};
|
|
|
|
return {
|
|
element: element,
|
|
contentWindow: element.ownerDocument.defaultView,
|
|
offset: offset,
|
|
utils: utils
|
|
};
|
|
},
|
|
|
|
_getDocShell: function _getDocShell(aWindow) {
|
|
if (aWindow == null)
|
|
return null;
|
|
return aWindow.QueryInterface(Ci.nsIInterfaceRequestor)
|
|
.getInterface(Ci.nsIWebNavigation)
|
|
.QueryInterface(Ci.nsIDocShell);
|
|
},
|
|
|
|
_getSelectedText: function _getSelectedText() {
|
|
let selection = this._getSelection();
|
|
if (selection)
|
|
return selection.toString();
|
|
return "";
|
|
},
|
|
|
|
_getSelection: function _getSelection() {
|
|
if (this._targetElement instanceof Ci.nsIDOMNSEditableElement) {
|
|
return this._targetElement
|
|
.QueryInterface(Ci.nsIDOMNSEditableElement)
|
|
.editor.selection;
|
|
} else if (this._contentWindow)
|
|
return this._contentWindow.getSelection();
|
|
return null;
|
|
},
|
|
|
|
_getSelectController: function _getSelectController() {
|
|
if (this._targetElement instanceof Ci.nsIDOMNSEditableElement) {
|
|
return this._targetElement
|
|
.QueryInterface(Ci.nsIDOMNSEditableElement)
|
|
.editor.selectionController;
|
|
} else {
|
|
let docShell = this._getDocShell(this._contentWindow);
|
|
if (docShell == null)
|
|
return null;
|
|
return docShell.QueryInterface(Ci.nsIInterfaceRequestor)
|
|
.getInterface(Ci.nsISelectionDisplay)
|
|
.QueryInterface(Ci.nsISelectionController);
|
|
}
|
|
},
|
|
};
|
|
|
|
SelectionHandler.__proto__ = new SelectionPrototype();
|
|
SelectionHandler.init();
|
|
|