diff options
Diffstat (limited to 'android/source/src/java/org/libreoffice/InvalidationHandler.java')
| -rw-r--r-- | android/source/src/java/org/libreoffice/InvalidationHandler.java | 768 |
1 files changed, 768 insertions, 0 deletions
diff --git a/android/source/src/java/org/libreoffice/InvalidationHandler.java b/android/source/src/java/org/libreoffice/InvalidationHandler.java new file mode 100644 index 000000000..0f3f1dd7b --- /dev/null +++ b/android/source/src/java/org/libreoffice/InvalidationHandler.java @@ -0,0 +1,768 @@ +package org.libreoffice; + +import android.content.Intent; +import android.graphics.PointF; +import android.graphics.RectF; +import android.net.Uri; +import android.util.Log; +import android.widget.EditText; +import android.widget.Toast; + +import org.json.JSONArray; +import org.json.JSONException; +import org.json.JSONObject; +import org.libreoffice.canvas.SelectionHandle; +import org.libreoffice.kit.Document; +import org.libreoffice.kit.Office; +import org.libreoffice.overlay.DocumentOverlay; +import org.mozilla.gecko.gfx.GeckoLayerClient; + +import java.util.ArrayList; +import java.util.Collections; +import java.util.List; + +/** + * Parses (interprets) and handles invalidation messages from LibreOffice. + */ +public class InvalidationHandler implements Document.MessageCallback, Office.MessageCallback { + private static final String LOGTAG = InvalidationHandler.class.getSimpleName(); + private final DocumentOverlay mDocumentOverlay; + private final GeckoLayerClient mLayerClient; + private OverlayState mState; + private boolean mKeyEvent = false; + private final LibreOfficeMainActivity mContext; + + private int currentTotalPageNumber = 0; // total page number of the current document + + public InvalidationHandler(LibreOfficeMainActivity context) { + mContext = context; + mDocumentOverlay = mContext.getDocumentOverlay(); + mLayerClient = mContext.getLayerClient(); + mState = OverlayState.NONE; + } + + /** + * Processes callback message + * + * @param messageID - ID of the message + * @param payload - additional invalidation message payload + */ + @Override + public void messageRetrieved(int messageID, String payload) { + if (!LOKitShell.isEditingEnabled()) { + // enable handling of hyperlinks and search result even in the Viewer + if (messageID != Document.CALLBACK_INVALIDATE_TILES + && messageID != Document.CALLBACK_DOCUMENT_PASSWORD + && messageID != Document.CALLBACK_HYPERLINK_CLICKED + && messageID != Document.CALLBACK_SEARCH_RESULT_SELECTION + && messageID != Document.CALLBACK_SC_FOLLOW_JUMP + && messageID != Document.CALLBACK_TEXT_SELECTION + && messageID != Document.CALLBACK_TEXT_SELECTION_START + && messageID != Document.CALLBACK_TEXT_SELECTION_END) + return; + } + switch (messageID) { + case Document.CALLBACK_INVALIDATE_TILES: + invalidateTiles(payload); + break; + case Document.CALLBACK_UNO_COMMAND_RESULT: + unoCommandResult(payload); + break; + case Document.CALLBACK_INVALIDATE_VISIBLE_CURSOR: + invalidateCursor(payload); + break; + case Document.CALLBACK_TEXT_SELECTION: + textSelection(payload); + break; + case Document.CALLBACK_TEXT_SELECTION_START: + textSelectionStart(payload); + break; + case Document.CALLBACK_TEXT_SELECTION_END: + textSelectionEnd(payload); + break; + case Document.CALLBACK_CURSOR_VISIBLE: + cursorVisibility(payload); + break; + case Document.CALLBACK_GRAPHIC_SELECTION: + graphicSelection(payload); + break; + case Document.CALLBACK_HYPERLINK_CLICKED: + if (!payload.startsWith("http://") && !payload.startsWith("https://")) { + payload = "http://" + payload; + } + Intent urlIntent = new Intent(Intent.ACTION_VIEW); + urlIntent.setData(Uri.parse(payload)); + mContext.startActivity(urlIntent); + break; + case Document.CALLBACK_STATE_CHANGED: + stateChanged(payload); + break; + case Document.CALLBACK_SEARCH_RESULT_SELECTION: + searchResultSelection(payload); + // when doing a search, CALLBACK_SEARCH_RESULT_SELECTION is called in addition + // to the CALLBACK_TEXT_SELECTION{,_START,_END} callbacks and the handling of + // the previous 3 makes the cursor shown in addition to the selection rectangle, + // so hide the cursor again to just show the selection rectangle for the search result + mDocumentOverlay.hideCursor(); + mDocumentOverlay.hideHandle(SelectionHandle.HandleType.MIDDLE); + mDocumentOverlay.hideHandle(SelectionHandle.HandleType.START); + mDocumentOverlay.hideHandle(SelectionHandle.HandleType.END); + break; + case Document.CALLBACK_SEARCH_NOT_FOUND: + Log.d(LOGTAG, "LOK_CALLBACK: Search not found."); + // this callback is never caught. Hope someone fix this. + break; + case Document.CALLBACK_CELL_CURSOR: + invalidateCellCursor(payload); + break; + case Document.CALLBACK_SC_FOLLOW_JUMP: + jumpToCell(payload); + break; + case Document.CALLBACK_INVALIDATE_HEADER: + invalidateHeader(); + break; + case Document.CALLBACK_CELL_ADDRESS: + cellAddress(payload); + break; + case Document.CALLBACK_CELL_FORMULA: + cellFormula(payload); + break; + case Document.CALLBACK_DOCUMENT_PASSWORD: + documentPassword(); + break; + case Document.CALLBACK_DOCUMENT_SIZE_CHANGED: + pageSizeChanged(payload); + default: + + Log.d(LOGTAG, "LOK_CALLBACK uncaught: " + messageID + " : " + payload); + } + } + + private void unoCommandResult(String payload) { + try { + JSONObject payloadObject = new JSONObject(payload); + if (payloadObject.getString("commandName").equals(".uno:Save")) { + if (payloadObject.getString("success").equals("true")) { + mContext.saveFileToOriginalSource(); + } + }else if(payloadObject.getString("commandName").equals(".uno:Name") || + payloadObject.getString("commandName").equals(".uno:RenamePage")){ + //success returns false even though its true for some reason, + LOKitShell.getMainHandler().post(new Runnable() { + @Override + public void run() { + mContext.getTileProvider().resetParts(); + mContext.getDocumentPartViewListAdapter().notifyDataSetChanged(); + LibreOfficeMainActivity.setDocumentChanged(true); + Toast.makeText(mContext, mContext.getString(R.string.part_name_changed), Toast.LENGTH_SHORT).show(); + } + }); + } else if(payloadObject.getString("commandName").equals(".uno:Remove") || + payloadObject.getString("commandName").equals(".uno:DeletePage") ) { + LOKitShell.getMainHandler().post(new Runnable() { + @Override + public void run() { + mContext.getTileProvider().resetParts(); + mContext.getDocumentPartViewListAdapter().notifyDataSetChanged(); + LibreOfficeMainActivity.setDocumentChanged(true); + Toast.makeText(mContext, mContext.getString(R.string.part_deleted), Toast.LENGTH_SHORT).show(); + } + }); + } + }catch(JSONException e){ + e.printStackTrace(); + } + } + + private void cellFormula(final String payload) { + LOKitShell.getMainHandler().post(new Runnable() { + @Override + public void run() { + ((EditText)mContext.findViewById(R.id.calc_formula)).setText(payload); + } + }); + } + + private void cellAddress(final String payload) { + LOKitShell.getMainHandler().post(new Runnable() { + @Override + public void run() { + ((EditText)mContext.findViewById(R.id.calc_address)).setText(payload); + } + }); + } + + private void invalidateHeader() { + LOKitShell.sendEvent(new LOEvent(LOEvent.UPDATE_CALC_HEADERS)); + } + + private void documentPassword() { + mContext.setPasswordProtected(true); + mContext.promptForPassword(); + synchronized (this) { + try { + this.wait(); + } catch (InterruptedException e) { + e.printStackTrace(); + } + } + mContext.setPassword(); + } + + private void invalidateCellCursor(String payload) { + RectF cellCursorRect = convertPayloadToRectangle(payload); + + if (cellCursorRect != null) { + mDocumentOverlay.showCellSelection(cellCursorRect); + moveViewportToMakeSelectionVisible(cellCursorRect); + } + } + + private void jumpToCell(String payload) { + RectF cellCursorRect = convertPayloadCellToRectangle(payload); + + if (cellCursorRect != null) { + moveViewportToMakeSelectionVisible(cellCursorRect); + } + } + + /** + * Handles the search result selection message, which is a JSONObject + * + * @param payload + */ + private void searchResultSelection(String payload) { + RectF selectionRectangle = null; + try { + JSONObject collectiveResult = new JSONObject(payload); + JSONArray searchResult = collectiveResult.getJSONArray("searchResultSelection"); + if (searchResult.length() == 1) { + String rectangle = searchResult.getJSONObject(0).getString("rectangles"); + selectionRectangle = convertPayloadToRectangle(rectangle); + } + } catch (JSONException e) { + e.printStackTrace(); + } + if (selectionRectangle != null) { + moveViewportToMakeSelectionVisible(selectionRectangle); + } + } + + /** + * Move the viewport to show the selection. The selection will appear at the + * viewport position depending on where the selection is relative to the + * viewport (either selection is above, below, on left or right). The difference + * between this method and moveViewportToMakeCursorVisible() is that this method + * takes into account the width and height of the selection and zooms out + * accordingly. + * + * @param selectionRectangle - selection position on the document + */ + public void moveViewportToMakeSelectionVisible(RectF selectionRectangle) { + RectF moveToRect = mLayerClient.getViewportMetrics().getCssViewport(); + if (moveToRect.contains(selectionRectangle)) { + return; + } + + float newLeft = moveToRect.left; + float newTop = moveToRect.top; + + // if selection rectangle is wider or taller than current viewport, we need to zoom out + float oldZoom = mLayerClient.getViewportMetrics().getZoomFactor(); + float widthRatio = 1f; + float heightRatio = 1f; + if (moveToRect.width() < selectionRectangle.width()) { + widthRatio = selectionRectangle.width() / moveToRect.width() / 0.85f; // 0.85f gives some margin (must < 0.9) + } + if (moveToRect.height() < selectionRectangle.height()) { + heightRatio = selectionRectangle.height() / moveToRect.height() / 0.45f; // 0.45f gives some margin (must < 0.5) + } + float newZoom = widthRatio > heightRatio ? oldZoom/widthRatio : oldZoom/heightRatio; + + // if selection is out of viewport we need to adjust accordingly + if (selectionRectangle.right < moveToRect.left || selectionRectangle.left < moveToRect.left) { + newLeft = selectionRectangle.left - (moveToRect.width() * 0.1f) * oldZoom / newZoom; // 0.1f gives left margin + } else if (selectionRectangle.right > moveToRect.right || selectionRectangle.left > moveToRect.right) { + newLeft = selectionRectangle.right - (moveToRect.width() * 0.9f) * oldZoom / newZoom; // 0.9f gives right margin + } + + if (selectionRectangle.top < moveToRect.top || selectionRectangle.bottom < moveToRect.top) { + newTop = selectionRectangle.top - (moveToRect.height() * 0.1f) * oldZoom / newZoom; // 0.1f gives top margin + } else if (selectionRectangle.bottom > moveToRect.bottom || selectionRectangle.top > moveToRect.bottom){ + newTop = selectionRectangle.bottom - (moveToRect.height() * 0.5f) * oldZoom / newZoom; // 0.5 f gives bottom margin + } + + LOKitShell.moveViewportTo(mContext, new PointF(newLeft, newTop), newZoom); + } + + private void pageSizeChanged(String payload){ + if(mContext.getTileProvider().isTextDocument()){ + String[] bounds = payload.split(","); + int pageWidth = Integer.parseInt(bounds[0]); + int pageHeight = Integer.parseInt(bounds[1].trim()); + LOKitShell.sendEvent(new LOEvent(LOEvent.PAGE_SIZE_CHANGED, pageWidth, pageHeight)); + } + } + + private void stateChanged(String payload) { + String[] parts = payload.split("="); + if (parts.length < 2) { + Log.e(LOGTAG, "LOK_CALLBACK_STATE_CHANGED unexpected payload: " + payload); + return; + } + final String value = parts[1]; + boolean pressed = Boolean.parseBoolean(value); + if (!mContext.getTileProvider().isReady()) { + Log.w(LOGTAG, "tile provider not ready, ignoring payload "+payload); + return; + } + if (parts[0].equals(".uno:Bold")) { + mContext.getFormattingController().onToggleStateChanged(Document.BOLD, pressed); + } else if (parts[0].equals(".uno:Italic")) { + mContext.getFormattingController().onToggleStateChanged(Document.ITALIC, pressed); + } else if (parts[0].equals(".uno:Underline")) { + mContext.getFormattingController().onToggleStateChanged(Document.UNDERLINE, pressed); + } else if (parts[0].equals(".uno:Strikeout")) { + mContext.getFormattingController().onToggleStateChanged(Document.STRIKEOUT, pressed); + } else if (parts[0].equals(".uno:CharFontName")) { + mContext.getFontController().selectFont(value); + } else if (parts[0].equals(".uno:FontHeight")) { + mContext.getFontController().selectFontSize(value); + } else if (parts[0].equals(".uno:LeftPara")) { + mContext.getFormattingController().onToggleStateChanged(Document.ALIGN_LEFT, pressed); + } else if (parts[0].equals(".uno:CenterPara")) { + mContext.getFormattingController().onToggleStateChanged(Document.ALIGN_CENTER, pressed); + } else if (parts[0].equals(".uno:RightPara")) { + mContext.getFormattingController().onToggleStateChanged(Document.ALIGN_RIGHT, pressed); + } else if (parts[0].equals(".uno:JustifyPara")) { + mContext.getFormattingController().onToggleStateChanged(Document.ALIGN_JUSTIFY, pressed); + } else if (parts[0].equals(".uno:DefaultBullet")) { + mContext.getFormattingController().onToggleStateChanged(Document.BULLET_LIST, pressed); + } else if (parts[0].equals(".uno:DefaultNumbering")) { + mContext.getFormattingController().onToggleStateChanged(Document.NUMBERED_LIST, pressed); + } else if (parts[0].equals(".uno:Color")) { + mContext.getFontController().colorPaletteListener.updateColorPickerPosition(Integer.parseInt(value)); + } else if (mContext.getTileProvider().isTextDocument() && parts[0].equals(".uno:BackColor")) { + mContext.getFontController().backColorPaletteListener.updateColorPickerPosition(Integer.parseInt(value)); + } else if (mContext.getTileProvider().isPresentation() && parts[0].equals(".uno:CharBackColor")) { + mContext.getFontController().backColorPaletteListener.updateColorPickerPosition(Integer.parseInt(value)); + } else if (mContext.getTileProvider().isSpreadsheet() && parts[0].equals(".uno:BackgroundColor")) { + mContext.getFontController().backColorPaletteListener.updateColorPickerPosition(Integer.parseInt(value)); + } else if (parts[0].equals(".uno:StatePageNumber")) { + // get the total page number and compare to the current value and update accordingly + String[] splitStrings = parts[1].split(" "); + int totalPageNumber = Integer.valueOf(splitStrings[splitStrings.length - 1]); + if (totalPageNumber != currentTotalPageNumber) { + currentTotalPageNumber = totalPageNumber; + // update part page rectangles stored in DocumentOverlayView object + LOKitShell.sendEvent(new LOEvent(LOEvent.UPDATE_PART_PAGE_RECT)); + } + } else { + Log.d(LOGTAG, "LOK_CALLBACK_STATE_CHANGED type uncatched: " + payload); + } + } + + /** + * Parses the payload text with rectangle coordinates and converts to rectangle in pixel coordinates + * + * @param payload - invalidation message payload text + * @return rectangle in pixel coordinates + */ + public RectF convertPayloadToRectangle(String payload) { + String payloadWithoutWhitespace = payload.replaceAll("\\s", ""); // remove all whitespace from the string + + if (payloadWithoutWhitespace.isEmpty() || payloadWithoutWhitespace.equals("EMPTY")) { + return null; + } + + String[] coordinates = payloadWithoutWhitespace.split(","); + + if (coordinates.length != 4) { + return null; + } + return convertPayloadToRectangle(coordinates); + } + + /** + * Parses the payload text with rectangle coordinates and converts to rectangle in pixel coordinates + * + * @param payload - invalidation message payload text + * @return rectangle in pixel coordinates + */ + public RectF convertPayloadCellToRectangle(String payload) { + String payloadWithoutWhitespace = payload.replaceAll("\\s", ""); // remove all whitespace from the string + + if (payloadWithoutWhitespace.isEmpty() || payloadWithoutWhitespace.equals("EMPTY")) { + return null; + } + + String[] coordinates = payloadWithoutWhitespace.split(","); + + if (coordinates.length != 6 ) { + return null; + } + return convertPayloadToRectangle(coordinates); + } + + /** + * Converts rectangle coordinates to rectangle in pixel coordinates + * + * @param coordinates - the first four items defines the rectangle + * @return rectangle in pixel coordinates + */ + public RectF convertPayloadToRectangle(String[] coordinates) { + if (coordinates.length < 4 ) { + return null; + } + + int x = Integer.decode(coordinates[0]); + int y = Integer.decode(coordinates[1]); + int width = Integer.decode(coordinates[2]); + int height = Integer.decode(coordinates[3]); + + float dpi = LOKitShell.getDpi(mContext); + + return new RectF( + LOKitTileProvider.twipToPixel(x, dpi), + LOKitTileProvider.twipToPixel(y, dpi), + LOKitTileProvider.twipToPixel(x + width, dpi), + LOKitTileProvider.twipToPixel(y + height, dpi) + ); + } + + /** + * Parses the payload text with more rectangles (separated by ';') and converts to a list of rectangles. + * + * @param payload - invalidation message payload text + * @return list of rectangles + */ + public List<RectF> convertPayloadToRectangles(String payload) { + List<RectF> rectangles = new ArrayList<RectF>(); + String[] rectangleArray = payload.split(";"); + + for (String coordinates : rectangleArray) { + RectF rectangle = convertPayloadToRectangle(coordinates); + if (rectangle != null) { + rectangles.add(rectangle); + } + + } + + return rectangles; + } + + /** + * Handles the tile invalidation message + * + * @param payload + */ + private void invalidateTiles(String payload) { + RectF rectangle = convertPayloadToRectangle(payload); + if (rectangle != null) { + LOKitShell.sendTileInvalidationRequest(rectangle); + } + } + + /** + * Handles the cursor invalidation message + * + * @param payload + */ + private synchronized void invalidateCursor(String payload) { + RectF cursorRectangle = convertPayloadToRectangle(payload); + if (cursorRectangle != null) { + mDocumentOverlay.positionCursor(cursorRectangle); + mDocumentOverlay.positionHandle(SelectionHandle.HandleType.MIDDLE, cursorRectangle); + + if (mState == OverlayState.TRANSITION || mState == OverlayState.CURSOR) { + changeStateTo(OverlayState.CURSOR); + } + + if (mKeyEvent) { + moveViewportToMakeCursorVisible(cursorRectangle); + mKeyEvent = false; + } + } + } + + /** + * Move the viewport to show the cursor. The cursor will appear at the + * viewport position depending on where the cursor is relative to the + * viewport (either cursor is above, below, on left or right). + * + * @param cursorRectangle - cursor position on the document + */ + public void moveViewportToMakeCursorVisible(RectF cursorRectangle) { + RectF moveToRect = mLayerClient.getViewportMetrics().getCssViewport(); + if (moveToRect.contains(cursorRectangle)) { + return; + } + + float newLeft = moveToRect.left; + float newTop = moveToRect.top; + + if (cursorRectangle.right < moveToRect.left || cursorRectangle.left < moveToRect.left) { + newLeft = cursorRectangle.left - (moveToRect.width() * 0.1f); + } else if (cursorRectangle.right > moveToRect.right || cursorRectangle.left > moveToRect.right) { + newLeft = cursorRectangle.right - (moveToRect.width() * 0.9f); + } + + if (cursorRectangle.top < moveToRect.top || cursorRectangle.bottom < moveToRect.top) { + newTop = cursorRectangle.top - (moveToRect.height() * 0.1f); + } else if (cursorRectangle.bottom > moveToRect.bottom || cursorRectangle.top > moveToRect.bottom) { + newTop = cursorRectangle.bottom - (moveToRect.height() / 2.0f); + } + + LOKitShell.moveViewportTo(mContext, new PointF(newLeft, newTop), null); + } + + /** + * Handles the text selection start message + * + * @param payload + */ + private synchronized void textSelectionStart(String payload) { + RectF selectionRect = convertPayloadToRectangle(payload); + if (selectionRect != null) { + mDocumentOverlay.positionHandle(SelectionHandle.HandleType.START, selectionRect); + } + } + + /** + * Handles the text selection end message + * + * @param payload + */ + private synchronized void textSelectionEnd(String payload) { + RectF selectionRect = convertPayloadToRectangle(payload); + if (selectionRect != null) { + mDocumentOverlay.positionHandle(SelectionHandle.HandleType.END, selectionRect); + } + } + + /** + * Handles the text selection message + * + * @param payload + */ + private synchronized void textSelection(String payload) { + if (payload.isEmpty() || payload.equals("EMPTY")) { + if (mState == OverlayState.SELECTION) { + changeStateTo(OverlayState.TRANSITION); + } + mDocumentOverlay.changeSelections(Collections.<RectF>emptyList()); + if (mContext.getTileProvider().isSpreadsheet()) { + mDocumentOverlay.showHeaderSelection(null); + } + mContext.getToolbarController().showHideClipboardCutAndCopy(false); + } else { + List<RectF> rectangles = convertPayloadToRectangles(payload); + if (mState != OverlayState.SELECTION) { + changeStateTo(OverlayState.TRANSITION); + } + changeStateTo(OverlayState.SELECTION); + mDocumentOverlay.changeSelections(rectangles); + if (mContext.getTileProvider().isSpreadsheet()) { + mDocumentOverlay.showHeaderSelection(rectangles.get(0)); + } + String selectedText = mContext.getTileProvider().getTextSelection(""); + mContext.getToolbarController().showClipboardActions(selectedText); + } + } + + /** + * Handles the cursor visibility message + * + * @param payload + */ + private synchronized void cursorVisibility(String payload) { + if (payload.equals("true")) { + mDocumentOverlay.showCursor(); + if (mState != OverlayState.SELECTION) { + mDocumentOverlay.showHandle(SelectionHandle.HandleType.MIDDLE); + } + } else if (payload.equals("false")) { + mDocumentOverlay.hideCursor(); + mDocumentOverlay.hideHandle(SelectionHandle.HandleType.MIDDLE); + } + } + + /** + * Handles the graphic selection change message + * + * @param payload + */ + private void graphicSelection(String payload) { + if (payload.isEmpty() || payload.equals("EMPTY")) { + if (mState == OverlayState.GRAPHIC_SELECTION) { + changeStateTo(OverlayState.TRANSITION); + } + } else { + RectF rectangle = convertPayloadToRectangle(payload); + mDocumentOverlay.changeGraphicSelection(rectangle); + if (mState != OverlayState.GRAPHIC_SELECTION) { + changeStateTo(OverlayState.TRANSITION); + } + changeStateTo(OverlayState.GRAPHIC_SELECTION); + } + } + + /** + * Trigger a transition to a new overlay state. + * + * @param next - new state to transition to + */ + public synchronized void changeStateTo(OverlayState next) { + changeState(mState, next); + } + + /** + * Executes a transition from old overlay state to a new overlay state. + * + * @param previous - old state + * @param next - new state + */ + private synchronized void changeState(OverlayState previous, OverlayState next) { + mState = next; + handleGeneralChangeState(previous, next); + switch (next) { + case CURSOR: + handleCursorState(previous); + break; + case SELECTION: + handleSelectionState(previous); + break; + case GRAPHIC_SELECTION: + handleGraphicSelectionState(previous); + break; + case TRANSITION: + handleTransitionState(previous); + break; + case NONE: + handleNoneState(previous); + break; + } + } + + /** + * Handle a general transition - executed for all transitions. + */ + private void handleGeneralChangeState(OverlayState previous, OverlayState next) { + if (previous == OverlayState.NONE && + !mContext.getToolbarController().getEditModeStatus()) { + mContext.getToolbarController().switchToEditMode(); + } else if (next == OverlayState.NONE && + mContext.getToolbarController().getEditModeStatus()) { + mContext.getToolbarController().switchToViewMode(); + } + } + + /** + * Handle a transition to OverlayState.NONE state. + */ + private void handleNoneState(OverlayState previous) { + if (previous == OverlayState.NONE) { + return; + } + + // Just hide everything + mDocumentOverlay.hideHandle(SelectionHandle.HandleType.START); + mDocumentOverlay.hideHandle(SelectionHandle.HandleType.END); + mDocumentOverlay.hideHandle(SelectionHandle.HandleType.MIDDLE); + mDocumentOverlay.hideSelections(); + mDocumentOverlay.hideCursor(); + mDocumentOverlay.hideGraphicSelection(); + mContext.hideSoftKeyboard(); + } + + /** + * Handle a transition to OverlayState.SELECTION state. + */ + private void handleSelectionState(OverlayState previous) { + mDocumentOverlay.showHandle(SelectionHandle.HandleType.START); + mDocumentOverlay.showHandle(SelectionHandle.HandleType.END); + mDocumentOverlay.showSelections(); + } + + /** + * Handle a transition to OverlayState.CURSOR state. + */ + private void handleCursorState(OverlayState previous) { + mContext.showSoftKeyboardOrFormattingToolbar(); + if (previous == OverlayState.TRANSITION) { + mDocumentOverlay.showHandle(SelectionHandle.HandleType.MIDDLE); + mDocumentOverlay.showCursor(); + } + } + + /** + * Handle a transition to OverlayState.TRANSITION state. + */ + private void handleTransitionState(OverlayState previous) { + switch (previous) { + case SELECTION: + mDocumentOverlay.hideHandle(SelectionHandle.HandleType.START); + mDocumentOverlay.hideHandle(SelectionHandle.HandleType.END); + mDocumentOverlay.hideSelections(); + break; + case CURSOR: + mDocumentOverlay.hideHandle(SelectionHandle.HandleType.MIDDLE); + break; + case GRAPHIC_SELECTION: + mDocumentOverlay.hideGraphicSelection(); + break; + } + } + + /** + * Handle a transition to OverlayState.GRAPHIC_SELECTION state. + */ + private void handleGraphicSelectionState(OverlayState previous) { + mDocumentOverlay.showGraphicSelection(); + mContext.hideSoftKeyboard(); + } + + /** + * The current state the overlay is in. + */ + public OverlayState getCurrentState() { + return mState; + } + + /** + * A key event happened (i.e. user started typing). + */ + public void keyEvent() { + mKeyEvent = true; + } + + /** + * The states the overlay. + */ + public enum OverlayState { + /** + * State where the overlay is empty + */ + NONE, + /** + * In-between state where we need to transition to a new overlay state. + * In this state we properly disable the older state and wait to transition + * to a new state triggered by an invalidation. + */ + TRANSITION, + /** + * State where we operate with the cursor. + */ + CURSOR, + /** + * State where we operate the graphic selection. + */ + GRAPHIC_SELECTION, + /** + * State where we operate the text selection. + */ + SELECTION + } +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |