/usr/lib/x86_64-linux-gnu/qt5/qml/Ubuntu/Components/1.3/TextCursor.qml is in qml-module-ubuntu-components 1.3.1918+16.04.20160404-0ubuntu1.
This file is owned by root:root, with mode 0o644.
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* Copyright 2015 Canonical Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; version 3.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
import QtQuick 2.4
import Ubuntu.Components 1.3 as Ubuntu
import Ubuntu.Components.Popups 1.3
Ubuntu.StyledItem {
id: cursorItem
height: cursorRectangle.height
/*
Property holding the text input's cursor position property. Can be one of
the following ones: cursorPosition, selectionStart and selectionEnd.
*/
property string positionProperty: "cursorPosition"
/*
Input handler instance
*/
property InputHandler handler
/*
Cursor delegate used. This is the visual component from the main
*/
readonly property Component cursorDelegate: handler.main.cursorDelegate ?
handler.main.cursorDelegate :
__styleInstance.cursorDelegate
styleName: "TextCursorStyle"
objectName: "textCursor"
//Caret instance from the style.
property Item caret: __styleInstance.caret
property int absX: {
return fakeCursor.parent.mapFromItem(handler.main, cursorItem.x, cursorItem.y).x
}
property int absY: {
// Take parent flickable movement into account
var flickable = handler.main;
do {
flickable = flickable.parent;
} while (flickable && !flickable.contentY && flickable != fakeCursor.parent);
return fakeCursor.parent.mapFromItem(handler.main, cursorItem.x, cursorItem.y).y
}
// Returns "x" or "y" relative to the item handlers are a child of
function mappedCursorPosition(coordinate) {
var cpos = cursorItem["abs" + coordinate.toUpperCase()];
cpos += handler.frameDistance[coordinate];
cpos += handler.input[coordinate];
cpos -= handler.flickable["content" + coordinate.toUpperCase()];
return cpos;
}
/*
The function opens the text input popover setting the text cursor as caller.
*/
Connections {
target: handler
onPressAndHold: {
// open context menu only for cursorPosition or selectionStart as to
// ensure that only one popover gets opened
if (positionProperty !== "selectionEnd") {
openPopover(fromTouch);
}
}
onTextModified: typing = true
onTap: {
typing = false
if (handler.popover != null) {
PopupUtils.close(handler.popover);
}
}
}
Binding {
target: handler
property: "cursorPositionCursor"
value: cursorItem
}
function openPopover() {
if (!visible
|| opacity === 0.0
|| dragger.dragActive) {
return;
}
if (handler.popover != null) {
PopupUtils.close(handler.popover);
}
var component = handler.main.popover;
if (component === undefined)
component = Qt.resolvedUrl("TextInputPopover.qml");
// if the cursor is out of the visible viewport, anchor the
// contextual menu to the input field
var anchor = caret.visible ? draggedItem : handler.main
var popup = PopupUtils.open(component, anchor, {
"target": handler.main,
});
// hide the arrow
popup.__foreground.direction = "none";
cursorItem.Component.onDestruction.connect(popup.__closePopup);
contextMenuVisible = true;
popup.onVisibleChanged.connect(contextMenuHidden.bind(undefined, popup));
// do not grab focus!
popup.__foreground.activeFocusOnPress = false;
handler.popover = popup;
}
visible: handler.main.cursorVisible &&
!(positionProperty === "cursorPosition" && handler.main.selectedText !== "")
// cursor visual loader
Loader {
id: cursorLoader
sourceComponent: cursorDelegate
height: parent.height
}
/*
* Caret dragging handling. We need a separate item which is dragged along the
* component's area, which can move freely and not attached to the caret itself.
* This area will then be used to update the caret position.
*/
Binding {
target: caret
when: caret
property: "visible"
value: QuickUtils.touchScreenAvailable
&& (contextMenuVisible || !typing)
&& handler.main.text !== ""
}
property bool typing: false
property bool contextMenuVisible: false
property bool readOnly: handler.main.readOnly
function contextMenuHidden(p) {
contextMenuVisible = false
}
//dragged item
property Item draggedItem: Item {
objectName: cursorItem.positionProperty + "_draggeditem"
width: caret.width + units.gu(2)
onWidthChanged: draggedItem.moveToCaret()
height: cursorItem.height + caret.height + threshold
property real threshold: units.gu(4)
parent: fakeCursor.parent
visible: caret.visible
/*
Mouse area to turn on dragging or selection mode when pressed
on the handler area. The drag mode is turned off when the drag
gets inactive or when the LeftButton is released.
*/
MouseArea {
id: draggedItemMouseArea
objectName: cursorItem.positionProperty + "_activator"
anchors.fill: parent
acceptedButtons: Qt.LeftButton
preventStealing: true
cursorShape: Qt.IBeamCursor
enabled: parent.width && parent.height && parent.visible && !handler.doubleTapInProgress
onPressedChanged: {
if (!pressed) {
// when the dragging ends, reposition the dragger back to caret
draggedItem.moveToCaret();
}
}
Ubuntu.Mouse.forwardTo: [dragger]
Ubuntu.Mouse.onClicked: openPopover()
Ubuntu.Mouse.onPressAndHold: {
handler.main.selectWord();
handler.pressAndHold(-1, false);
}
Ubuntu.Mouse.onDoubleClicked: handler.main.selectWord()
Ubuntu.Mouse.enabled: enabled
// Visible touch target area for debugging purposes
Rectangle {
anchors.fill: parent
color: 'red'
opacity: 0.1
visible: false // draggedItemMouseArea.enabled
}
}
// aligns the draggedItem to the caret and resets the dragger
function moveToCaret() {
if (!caret) {
return;
}
// The style may render handlers either on top or bottom
var flip = caret.rotation == 180;
draggedItem.x = fakeCursor.x + (flip ? -caret.width : -draggedItem.width + caret.width);
draggedItem.y = fakeCursor.y + caret.y + caret.height - threshold;
}
// positions caret to the dragged position
function positionCaret() {
if (dragger.dragActive) {
var dx = dragger.dragStartX + dragger.dragAmountX + handler.flickable.contentX;
var dy = dragger.dragStartY + dragger.dragAmountY + handler.flickable.contentY;
dx -= handler.frameDistance.x;
dy -= handler.frameDistance.y;
handler.positionCaret(positionProperty, dx, dy);
}
}
}
MouseArea {
id: dragger
objectName: cursorItem.positionProperty + "_dragger"
cursorShape: Qt.IBeamCursor
// fill the entire component area
parent: handler.main
anchors.fill: parent
enabled: draggedItemMouseArea.enabled && draggedItemMouseArea.pressed && caret.visible
onEnabledChanged: {
if (enabled) {
dragAmountX = 0;
dragAmountY = 0;
firstMouseXChange = true;
firstMouseYChange = true;
} else {
dragActive = false;
}
}
property int dragStartX
property int dragAmountX
property int dragStartY
property int dragAmountY
property bool dragActive: false
property int dragThreshold: units.gu(2)
property bool firstMouseXChange: true
property bool firstMouseYChange: true
onMouseXChanged: {
if (firstMouseXChange) {
dragStartX = mouseX;
firstMouseXChange = false;
} else {
var amount = mouseX - dragStartX;
if (Math.abs(amount) >= dragThreshold) {
dragActive = true;
}
if (dragActive) {
dragAmountX = amount;
draggedItem.positionCaret();
}
}
}
onMouseYChanged: {
if (firstMouseYChange) {
dragStartY = mouseY;
firstMouseYChange = false;
} else {
var amount = mouseY - dragStartY;
if (Math.abs(amount) >= dragThreshold) {
dragActive = true;
}
if (dragActive) {
dragAmountY = amount;
draggedItem.positionCaret()
}
}
}
onDragActiveChanged: {
// close contextual menu when dragging and reopen it at the end of the drag
if (dragActive) {
if (handler.popover != null) {
PopupUtils.close(handler.popover);
}
} else {
handler.pressAndHold(-1, false);
}
}
}
// fake cursor, caret is reparented to it to avoid caret clipping
Item {
id: fakeCursor
objectName: positionProperty + "FakeCursor"
parent: QuickUtils.rootItem(handler.main)
width: cursorItem.width
height: cursorItem.height
Component.onCompleted: caret.parent = fakeCursor
x: mappedCursorPosition("x")
y: mappedCursorPosition("y")
onXChanged: draggedItem.moveToCaret()
onYChanged: draggedItem.moveToCaret()
// manual clipping: the caret should be visible only while the cursor's
// top/bottom falls into the text area
visible: {
if (!caret || !cursorItem.visible || cursorItem.opacity < 1.0)
return false;
var pos = handler.main.mapFromItem(fakeCursor.parent, fakeCursor.x, fakeCursor.y);
var leftTop = Qt.point(pos.x - handler.frameDistance.x, pos.y + handler.frameDistance.y + handler.lineSpacing);
var rightBottom = Qt.point(pos.x - handler.frameDistance.x, pos.y + height - handler.frameDistance.y - handler.lineSpacing);
return (handler.visibleArea.contains(leftTop) || handler.visibleArea.contains(rightBottom));
}
}
}
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