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Diffstat (limited to 'android/source/src/java/org/libreoffice/overlay/DocumentOverlayView.java')
| -rw-r--r-- | android/source/src/java/org/libreoffice/overlay/DocumentOverlayView.java | 552 |
1 files changed, 552 insertions, 0 deletions
diff --git a/android/source/src/java/org/libreoffice/overlay/DocumentOverlayView.java b/android/source/src/java/org/libreoffice/overlay/DocumentOverlayView.java new file mode 100644 index 000000000..086108cd9 --- /dev/null +++ b/android/source/src/java/org/libreoffice/overlay/DocumentOverlayView.java @@ -0,0 +1,552 @@ +/* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + */ +package org.libreoffice.overlay; + +import android.content.Context; +import android.graphics.Canvas; +import android.graphics.Color; +import android.graphics.Paint; +import android.graphics.PointF; +import android.graphics.RectF; +import android.util.AttributeSet; +import android.view.MotionEvent; +import android.view.View; + +import org.libreoffice.LibreOfficeMainActivity; +import org.libreoffice.R; +import org.libreoffice.canvas.AdjustLengthLine; +import org.libreoffice.canvas.CalcSelectionBox; +import org.libreoffice.canvas.Cursor; +import org.libreoffice.canvas.GraphicSelection; +import org.libreoffice.canvas.PageNumberRect; +import org.libreoffice.canvas.SelectionHandle; +import org.libreoffice.canvas.SelectionHandleEnd; +import org.libreoffice.canvas.SelectionHandleMiddle; +import org.libreoffice.canvas.SelectionHandleStart; +import org.mozilla.gecko.gfx.ImmutableViewportMetrics; +import org.mozilla.gecko.gfx.LayerView; +import org.mozilla.gecko.gfx.RectUtils; + +import java.util.ArrayList; +import java.util.List; + +/** + * Document overlay view is responsible for showing the client drawn overlay + * elements like cursor, selection and graphic selection, and manipulate them. + */ +public class DocumentOverlayView extends View implements View.OnTouchListener { + private static final String LOGTAG = DocumentOverlayView.class.getSimpleName(); + + private static final int CURSOR_BLINK_TIME = 500; + + private boolean mInitialized = false; + + private List<RectF> mSelections = new ArrayList<RectF>(); + private List<RectF> mScaledSelections = new ArrayList<RectF>(); + private Paint mSelectionPaint = new Paint(); + private boolean mSelectionsVisible; + + private GraphicSelection mGraphicSelection; + + private boolean mGraphicSelectionMove = false; + + private LayerView mLayerView; + + private SelectionHandle mHandleMiddle; + private SelectionHandle mHandleStart; + private SelectionHandle mHandleEnd; + + private Cursor mCursor; + + private SelectionHandle mDragHandle = null; + + private List<RectF> mPartPageRectangles; + private PageNumberRect mPageNumberRect; + private boolean mPageNumberAvailable = false; + private int previousIndex = 0; // previous page number, used to compare with the current + private CalcHeadersController mCalcHeadersController; + + private CalcSelectionBox mCalcSelectionBox; + private boolean mCalcSelectionBoxDragging; + private AdjustLengthLine mAdjustLengthLine; + private boolean mAdjustLengthLineDragging; + + public DocumentOverlayView(Context context) { + super(context); + } + + public DocumentOverlayView(Context context, AttributeSet attrs) { + super(context, attrs); + } + + public DocumentOverlayView(Context context, AttributeSet attrs, int defStyleAttr) { + super(context, attrs, defStyleAttr); + } + + /** + * Initialize the selection and cursor view. + */ + public void initialize(LayerView layerView) { + if (!mInitialized) { + setOnTouchListener(this); + mLayerView = layerView; + + mCursor = new Cursor(); + mCursor.setVisible(false); + + mSelectionPaint.setColor(Color.BLUE); + mSelectionPaint.setAlpha(50); + mSelectionsVisible = false; + + mGraphicSelection = new GraphicSelection((LibreOfficeMainActivity) getContext()); + mGraphicSelection.setVisible(false); + + postDelayed(cursorAnimation, CURSOR_BLINK_TIME); + + mHandleMiddle = new SelectionHandleMiddle((LibreOfficeMainActivity) getContext()); + mHandleStart = new SelectionHandleStart((LibreOfficeMainActivity) getContext()); + mHandleEnd = new SelectionHandleEnd((LibreOfficeMainActivity) getContext()); + + mInitialized = true; + } + } + + /** + * Change the cursor position. + * @param position - new position of the cursor + */ + public void changeCursorPosition(RectF position) { + if (RectUtils.fuzzyEquals(mCursor.mPosition, position)) { + return; + } + mCursor.mPosition = position; + + ImmutableViewportMetrics metrics = mLayerView.getViewportMetrics(); + repositionWithViewport(metrics.viewportRectLeft, metrics.viewportRectTop, metrics.zoomFactor); + } + + /** + * Change the text selection rectangles. + * @param selectionRects - list of text selection rectangles + */ + public void changeSelections(List<RectF> selectionRects) { + mSelections = selectionRects; + + ImmutableViewportMetrics metrics = mLayerView.getViewportMetrics(); + repositionWithViewport(metrics.viewportRectLeft, metrics.viewportRectTop, metrics.zoomFactor); + } + + /** + * Change the graphic selection rectangle. + * @param rectangle - new graphic selection rectangle + */ + public void changeGraphicSelection(RectF rectangle) { + if (RectUtils.fuzzyEquals(mGraphicSelection.mRectangle, rectangle)) { + return; + } + + mGraphicSelection.mRectangle = rectangle; + + ImmutableViewportMetrics metrics = mLayerView.getViewportMetrics(); + repositionWithViewport(metrics.viewportRectLeft, metrics.viewportRectTop, metrics.zoomFactor); + } + + public void repositionWithViewport(float x, float y, float zoom) { + RectF rect = convertToScreen(mCursor.mPosition, x, y, zoom); + mCursor.reposition(rect); + + rect = convertToScreen(mHandleMiddle.mDocumentPosition, x, y, zoom); + mHandleMiddle.reposition(rect.left, rect.bottom); + + rect = convertToScreen(mHandleStart.mDocumentPosition, x, y, zoom); + mHandleStart.reposition(rect.left, rect.bottom); + + rect = convertToScreen(mHandleEnd.mDocumentPosition, x, y, zoom); + mHandleEnd.reposition(rect.left, rect.bottom); + + mScaledSelections.clear(); + for (RectF selection : mSelections) { + RectF scaledSelection = convertToScreen(selection, x, y, zoom); + mScaledSelections.add(scaledSelection); + } + + if (mCalcSelectionBox != null) { + rect = convertToScreen(mCalcSelectionBox.mDocumentPosition, x, y, zoom); + mCalcSelectionBox.reposition(rect); + } + + if (mGraphicSelection != null && mGraphicSelection.mRectangle != null) { + RectF scaledGraphicSelection = convertToScreen(mGraphicSelection.mRectangle, x, y, zoom); + mGraphicSelection.reposition(scaledGraphicSelection); + } + + invalidate(); + } + + /** + * Convert the input rectangle from document to screen coordinates + * according to current viewport data (x, y, zoom). + */ + private static RectF convertToScreen(RectF inputRect, float x, float y, float zoom) { + RectF rect = RectUtils.scale(inputRect, zoom); + rect.offset(-x, -y); + return rect; + } + + /** + * Set part page rectangles and initialize a page number rectangle object + * (canvas element). + */ + public void setPartPageRectangles (List<RectF> rectangles) { + mPartPageRectangles = rectangles; + mPageNumberRect = new PageNumberRect(); + mPageNumberAvailable = true; + } + + /** + * Drawing on canvas. + */ + @Override + protected void onDraw(Canvas canvas) { + super.onDraw(canvas); + + mCursor.draw(canvas); + + if (mPageNumberAvailable) { + mPageNumberRect.draw(canvas); + } + + mHandleMiddle.draw(canvas); + mHandleStart.draw(canvas); + mHandleEnd.draw(canvas); + + if (mSelectionsVisible) { + for (RectF selection : mScaledSelections) { + canvas.drawRect(selection, mSelectionPaint); + } + } + + if (mCalcSelectionBox != null) { + mCalcSelectionBox.draw(canvas); + } + + mGraphicSelection.draw(canvas); + + if (mCalcHeadersController != null) { + mCalcHeadersController.showHeaders(); + } + + if (mAdjustLengthLine != null) { + mAdjustLengthLine.draw(canvas); + } + } + + /** + * Cursor animation function. Switch the alpha between opaque and fully transparent. + */ + private Runnable cursorAnimation = new Runnable() { + public void run() { + if (mCursor.isVisible()) { + mCursor.cycleAlpha(); + invalidate(); + } + postDelayed(cursorAnimation, CURSOR_BLINK_TIME); + } + }; + + /** + * Show the cursor on the view. + */ + public void showCursor() { + if (!mCursor.isVisible()) { + mCursor.setVisible(true); + invalidate(); + } + } + + /** + * Hide the cursor. + */ + public void hideCursor() { + if (mCursor.isVisible()) { + mCursor.setVisible(false); + invalidate(); + } + } + + /** + * Calculate and show page number according to current viewport position. + * In particular, this function compares the middle point of the + * view port with page rectangles and finds out which page the user + * is currently on. It does not update the associated canvas element + * unless there is a change of page number. + */ + public void showPageNumberRect() { + if (null == mPartPageRectangles) return; + PointF midPoint = mLayerView.getLayerClient().convertViewPointToLayerPoint(new PointF(getWidth()/2f, getHeight()/2f)); + int index = previousIndex; + // search which page the user in currently on. can enhance the search algorithm to binary search if necessary + for (RectF page : mPartPageRectangles) { + if (page.top < midPoint.y && midPoint.y < page.bottom) { + index = mPartPageRectangles.indexOf(page) + 1; + break; + } + } + // index == 0 applies to non-text document, i.e. don't show page info on non-text docs + if (index == 0) { + return; + } + // if page rectangle canvas element is not visible or the page number is changed, show + if (!mPageNumberRect.isVisible() || index != previousIndex) { + previousIndex = index; + String pageNumberString = getContext().getString(R.string.page) + " " + index + "/" + mPartPageRectangles.size(); + mPageNumberRect.setPageNumberString(pageNumberString); + mPageNumberRect.setVisible(true); + invalidate(); + } + } + + /** + * Hide page number rectangle canvas element. + */ + public void hidePageNumberRect() { + if (null == mPageNumberRect) return; + if (mPageNumberRect.isVisible()) { + mPageNumberRect.setVisible(false); + invalidate(); + } + } + + /** + * Show text selection rectangles. + */ + public void showSelections() { + if (!mSelectionsVisible) { + mSelectionsVisible = true; + invalidate(); + } + } + + /** + * Hide text selection rectangles. + */ + public void hideSelections() { + if (mSelectionsVisible) { + mSelectionsVisible = false; + invalidate(); + } + } + + /** + * Show the graphic selection on the view. + */ + public void showGraphicSelection() { + if (!mGraphicSelection.isVisible()) { + mGraphicSelectionMove = false; + mGraphicSelection.reset(); + mGraphicSelection.setVisible(true); + invalidate(); + } + } + + /** + * Hide the graphic selection. + */ + public void hideGraphicSelection() { + if (mGraphicSelection.isVisible()) { + mGraphicSelection.setVisible(false); + invalidate(); + } + } + + /** + * Handle the triggered touch event. + */ + @Override + public boolean onTouch(View view, MotionEvent event) { + PointF point = new PointF(event.getX(), event.getY()); + switch (event.getActionMasked()) { + case MotionEvent.ACTION_DOWN: { + if (mAdjustLengthLine != null && !mAdjustLengthLine.contains(point.x, point.y)) { + mAdjustLengthLine.setVisible(false); + invalidate(); + } + if (mGraphicSelection.isVisible()) { + // Check if inside graphic selection was hit + if (mGraphicSelection.contains(point.x, point.y)) { + mGraphicSelectionMove = true; + mGraphicSelection.dragStart(point); + invalidate(); + return true; + } + } else { + if (mHandleStart.contains(point.x, point.y)) { + mHandleStart.dragStart(point); + mDragHandle = mHandleStart; + return true; + } else if (mHandleEnd.contains(point.x, point.y)) { + mHandleEnd.dragStart(point); + mDragHandle = mHandleEnd; + return true; + } else if (mHandleMiddle.contains(point.x, point.y)) { + mHandleMiddle.dragStart(point); + mDragHandle = mHandleMiddle; + return true; + } else if (mCalcSelectionBox != null && + mCalcSelectionBox.contains(point.x, point.y) && + !mHandleStart.isVisible()) { + mCalcSelectionBox.dragStart(point); + mCalcSelectionBoxDragging = true; + return true; + } else if (mAdjustLengthLine != null && + mAdjustLengthLine.contains(point.x, point.y)) { + mAdjustLengthLine.dragStart(point); + mAdjustLengthLineDragging = true; + return true; + } + } + } + case MotionEvent.ACTION_UP: { + if (mGraphicSelection.isVisible() && mGraphicSelectionMove) { + mGraphicSelection.dragEnd(point); + mGraphicSelectionMove = false; + invalidate(); + return true; + } else if (mDragHandle != null) { + mDragHandle.dragEnd(point); + mDragHandle = null; + } else if (mCalcSelectionBoxDragging) { + mCalcSelectionBox.dragEnd(point); + mCalcSelectionBoxDragging = false; + } else if (mAdjustLengthLineDragging) { + mAdjustLengthLine.dragEnd(point); + mAdjustLengthLineDragging = false; + invalidate(); + } + } + case MotionEvent.ACTION_MOVE: { + if (mGraphicSelection.isVisible() && mGraphicSelectionMove) { + mGraphicSelection.dragging(point); + invalidate(); + return true; + } else if (mDragHandle != null) { + mDragHandle.dragging(point); + } else if (mCalcSelectionBoxDragging) { + mCalcSelectionBox.dragging(point); + } else if (mAdjustLengthLineDragging) { + mAdjustLengthLine.dragging(point); + invalidate(); + } + } + } + return false; + } + + /** + * Change the handle document position. + * @param type - the type of the handle + * @param position - the new document position + */ + public void positionHandle(SelectionHandle.HandleType type, RectF position) { + SelectionHandle handle = getHandleForType(type); + if (RectUtils.fuzzyEquals(handle.mDocumentPosition, position)) { + return; + } + + RectUtils.assign(handle.mDocumentPosition, position); + + ImmutableViewportMetrics metrics = mLayerView.getViewportMetrics(); + repositionWithViewport(metrics.viewportRectLeft, metrics.viewportRectTop, metrics.zoomFactor); + } + + /** + * Hide the handle. + * @param type - type of the handle + */ + public void hideHandle(SelectionHandle.HandleType type) { + SelectionHandle handle = getHandleForType(type); + if (handle.isVisible()) { + handle.setVisible(false); + invalidate(); + } + } + + /** + * Show the handle. + * @param type - type of the handle + */ + public void showHandle(SelectionHandle.HandleType type) { + SelectionHandle handle = getHandleForType(type); + if (!handle.isVisible()) { + handle.setVisible(true); + invalidate(); + } + } + + /** + * Returns the handle instance for the input type. + */ + private SelectionHandle getHandleForType(SelectionHandle.HandleType type) { + switch(type) { + case START: + return mHandleStart; + case END: + return mHandleEnd; + case MIDDLE: + return mHandleMiddle; + } + return null; + } + + public RectF getCurrentCursorPosition() { + return mCursor.mPosition; + } + + public void setCalcHeadersController(CalcHeadersController calcHeadersController) { + mCalcHeadersController = calcHeadersController; + mCalcSelectionBox = new CalcSelectionBox((LibreOfficeMainActivity) getContext()); + } + + public void showCellSelection(RectF cellCursorRect) { + if (mCalcHeadersController == null || mCalcSelectionBox == null) return; + if (RectUtils.fuzzyEquals(mCalcSelectionBox.mDocumentPosition, cellCursorRect)) { + return; + } + + // show selection on main GL view (i.e. in the document) + RectUtils.assign(mCalcSelectionBox.mDocumentPosition, cellCursorRect); + mCalcSelectionBox.setVisible(true); + + ImmutableViewportMetrics metrics = mLayerView.getViewportMetrics(); + repositionWithViewport(metrics.viewportRectLeft, metrics.viewportRectTop, metrics.zoomFactor); + + // show selection on headers + if (!mCalcHeadersController.pendingRowOrColumnSelectionToShowUp()) { + showHeaderSelection(cellCursorRect); + } else { + mCalcHeadersController.setPendingRowOrColumnSelectionToShowUp(false); + } + } + + public void showHeaderSelection(RectF rect) { + if (mCalcHeadersController == null) return; + mCalcHeadersController.showHeaderSelection(rect); + } + + public void showAdjustLengthLine(boolean isRow, final CalcHeadersView view) { + mAdjustLengthLine = new AdjustLengthLine((LibreOfficeMainActivity) getContext(), view, isRow, getWidth(), getHeight()); + ImmutableViewportMetrics metrics = mLayerView.getViewportMetrics(); + RectF position = convertToScreen(mCalcSelectionBox.mDocumentPosition, metrics.viewportRectLeft, metrics.viewportRectTop, metrics.zoomFactor); + mAdjustLengthLine.setScreenRect(position); + mAdjustLengthLine.setVisible(true); + invalidate(); + } +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |