mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
368 lines
9.7 KiB
JavaScript
368 lines
9.7 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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/*
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* Selection handler for chrome text inputs
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*/
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const kCaretMode = 1;
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const kSelectionMode = 2;
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var ChromeSelectionHandler = {
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_mode: kSelectionMode,
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/*************************************************
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* Messaging wrapper
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*/
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sendAsync: function sendAsync(aMsg, aJson) {
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SelectionHelperUI.receiveMessage({
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name: aMsg,
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json: aJson
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});
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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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* General selection start method for both caret and selection mode.
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*/
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_onSelectionAttach: function _onSelectionAttach(aJson) {
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this._domWinUtils = Util.getWindowUtils(window);
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this._contentWindow = window;
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this._targetElement = this._domWinUtils.elementFromPoint(aJson.xPos, aJson.yPos, true, false);
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this._targetIsEditable = this._targetElement instanceof Components.interfaces.nsIDOMXULTextBoxElement;
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if (!this._targetIsEditable) {
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this._onFail("not an editable?");
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return;
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}
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let selection = this._getSelection();
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if (!selection) {
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this._onFail("no selection.");
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return;
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}
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if (!selection.isCollapsed) {
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this._mode = kSelectionMode;
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this._updateSelectionUI("start", true, true);
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} else {
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this._mode = kCaretMode;
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this._updateSelectionUI("caret", false, false, true);
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}
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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.targetIsEditable) {
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this._onFail("_onSelectionMoveStart with bad targetElement.");
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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.targetIsEditable) {
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this._onFail("_onSelectionMove with bad targetElement.");
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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.targetIsEditable) {
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this._onFail("_onSelectionMoveEnd with bad targetElement.");
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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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// Clear any existing scroll timers
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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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* 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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this._mode = kSelectionMode;
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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 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 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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* Empty conversion routines to match those in
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* browser. Called by SelectionHelperUI when
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* sending and receiving coordinates in messages.
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*/
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ptClientToBrowser: function ptClientToBrowser(aX, aY, aIgnoreScroll, aIgnoreScale) {
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return { x: aX, y: aY }
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},
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rectBrowserToClient: function rectBrowserToClient(aRect, aIgnoreScroll, aIgnoreScale) {
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return {
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left: aRect.left,
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right: aRect.right,
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top: aRect.top,
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bottom: aRect.bottom
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}
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},
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ptBrowserToClient: function ptBrowserToClient(aX, aY, aIgnoreScroll, aIgnoreScale) {
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return { x: aX, y: aY }
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},
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ctobx: function ctobx(aCoord) {
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return aCoord;
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},
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ctoby: function ctoby(aCoord) {
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return aCoord;
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},
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btocx: function btocx(aCoord) {
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return aCoord;
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},
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btocy: function btocy(aCoord) {
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return aCoord;
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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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let selection = this._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._domWinUtils = null;
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this._targetIsEditable = false;
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this.sendAsync("Content:HandlerShutdown", {});
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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 = ChromeSelectionHandler.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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ChromeSelectionHandler._updateSelectionUI("update", result.start, result.end);
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}
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},
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msgHandler: function msgHandler(aMsg, aJson) {
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if (this._debugEvents && "Browser:SelectionMove" != aMsg) {
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Util.dumpLn("ChromeSelectionHandler:", aMsg);
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}
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switch(aMsg) {
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case "Browser:SelectionDebug":
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this._onSelectionDebug(aJson);
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break;
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case "Browser:SelectionAttach":
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this._onSelectionAttach(aJson);
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break;
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case "Browser:CaretAttach":
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this._onSelectionAttach(aJson);
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break;
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case "Browser:SelectionClose":
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this._onSelectionClose(aJson.clearSelection);
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break;
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case "Browser:SelectionUpdate":
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this._updateSelectionUI("update",
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this._mode == kSelectionMode,
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this._mode == kSelectionMode,
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this._mode == kCaretMode);
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break;
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case "Browser:SelectionMoveStart":
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this._onSelectionMoveStart(aJson);
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break;
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case "Browser:SelectionMove":
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this._onSelectionMove(aJson);
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break;
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case "Browser:SelectionMoveEnd":
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this._onSelectionMoveEnd(aJson);
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break;
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case "Browser:CaretUpdate":
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this._onCaretPositionUpdate(aJson.caret.xPos, aJson.caret.yPos);
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break;
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case "Browser:CaretMove":
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this._onCaretMove(aJson.caret.xPos, aJson.caret.yPos);
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break;
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case "Browser:SelectionSwitchMode":
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this._onSwitchMode(aJson.newMode, aJson.change, aJson.xPos, aJson.yPos);
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break;
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}
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},
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/*************************************************
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* Utilities
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*/
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_getSelection: function _getSelection() {
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if (this._targetElement instanceof Ci.nsIDOMXULTextBoxElement) {
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return this._targetElement
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.QueryInterface(Components.interfaces.nsIDOMXULTextBoxElement)
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.editor.selection;
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}
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return null;
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},
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_getSelectController: function _getSelectController() {
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return this._targetElement
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.QueryInterface(Components.interfaces.nsIDOMXULTextBoxElement)
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.editor.selectionController;
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},
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};
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ChromeSelectionHandler.__proto__ = new SelectionPrototype();
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ChromeSelectionHandler.type = 1; // kChromeSelector
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