accessible.java

源码为Eclipse开源开发平台桌面开发工具SWT的源代码,

				osDescription = new String(buffer);
			}
		}
		
		AccessibleEvent event = new AccessibleEvent(this);
		event.childID = osToChildID(varChild_lVal);
		event.result = osDescription;
		for (int i = 0; i < accessibleListeners.size(); i++) {
			AccessibleListener listener = (AccessibleListener) accessibleListeners.elementAt(i);
			listener.getDescription(event);
		}
		if (event.result == null) return code;
		char[] data = (event.result + "\0").toCharArray();
		int ptr = COM.SysAllocString(data);
		COM.MoveMemory(pszDescription, new int[] { ptr }, 4);
		return COM.S_OK;
	}
	
	int get_accFocus(int pvarChild) {
		if (iaccessible == null) return COM.CO_E_OBJNOTCONNECTED;

		/* Get the default focus child from the OS. */
		int osChild = ACC.CHILDID_NONE;
		int code = iaccessible.get_accFocus(pvarChild);
		if (accessibleControlListeners.size() == 0) return code;
		if (code == COM.S_OK) {
			short[] pvt = new short[1];
			COM.MoveMemory(pvt, pvarChild, 2);
			if (pvt[0] == COM.VT_I4) {
				int[] pChild = new int[1];
				COM.MoveMemory(pChild, pvarChild + 8, 4);
				osChild = osToChildID(pChild[0]);
			}
		}

		AccessibleControlEvent event = new AccessibleControlEvent(this);
		event.childID = osChild;
		for (int i = 0; i < accessibleControlListeners.size(); i++) {
			AccessibleControlListener listener = (AccessibleControlListener) accessibleControlListeners.elementAt(i);
			listener.getFocus(event);
		}
		Accessible accessible = event.accessible;
		if (accessible != null) {
			COM.MoveMemory(pvarChild, new short[] { COM.VT_DISPATCH }, 2);
			COM.MoveMemory(pvarChild + 8, new int[] { accessible.objIAccessible.getAddress() }, 4);
			return COM.S_OK;
		}
		int childID = event.childID;
		if (childID == ACC.CHILDID_NONE) {
			COM.MoveMemory(pvarChild, new short[] { COM.VT_EMPTY }, 2);
			return COM.S_FALSE;
		}
		if (childID == ACC.CHILDID_SELF) {
			COM.MoveMemory(pvarChild, new short[] { COM.VT_DISPATCH }, 2);
			COM.MoveMemory(pvarChild + 8, new int[] { objIAccessible.getAddress() }, 4);
			return COM.S_OK;
		}
		COM.MoveMemory(pvarChild, new short[] { COM.VT_I4 }, 2);
		COM.MoveMemory(pvarChild + 8, new int[] { childIDToOs(childID) }, 4);
		return COM.S_OK;
	}
	
	int get_accHelp(int varChild_vt, int varChild_reserved1, int varChild_lVal, int varChild_reserved2, int pszHelp) {
		if (iaccessible == null) return COM.CO_E_OBJNOTCONNECTED;
		if ((varChild_vt & 0xFFFF) != COM.VT_I4) return COM.E_INVALIDARG;
		
		/* Get the default help string from the OS. */
		String osHelp = null;
		int code = iaccessible.get_accHelp(varChild_vt, varChild_reserved1, varChild_lVal, varChild_reserved2, pszHelp);
		if (code == COM.E_INVALIDARG) code = COM.S_FALSE; // proxy doesn't know about app childID
		if (accessibleListeners.size() == 0) return code;
		if (code == COM.S_OK) {
			int[] pHelp = new int[1];
			COM.MoveMemory(pHelp, pszHelp, 4);
			int size = COM.SysStringByteLen(pHelp[0]);
			if (size > 0) {
				char[] buffer = new char[(size + 1) /2];
				COM.MoveMemory(buffer, pHelp[0], size);
				osHelp = new String(buffer);
			}
		}

		AccessibleEvent event = new AccessibleEvent(this);
		event.childID = osToChildID(varChild_lVal);
		event.result = osHelp;
		for (int i = 0; i < accessibleListeners.size(); i++) {
			AccessibleListener listener = (AccessibleListener) accessibleListeners.elementAt(i);
			listener.getHelp(event);
		}
		if (event.result == null) return code;
		char[] data = (event.result + "\0").toCharArray();
		int ptr = COM.SysAllocString(data);
		COM.MoveMemory(pszHelp, new int[] { ptr }, 4);
		return COM.S_OK;
	}
	
	int get_accHelpTopic(int pszHelpFile, int varChild_vt, int varChild_reserved1, int varChild_lVal, int varChild_reserved2, int pidTopic) {
		if (iaccessible == null) return COM.CO_E_OBJNOTCONNECTED;
		// Currently, we don't let the application override this. Forward to the proxy.
		int code = iaccessible.get_accHelpTopic(pszHelpFile, varChild_vt, varChild_reserved1, varChild_lVal, varChild_reserved2, pidTopic);
		if (code == COM.E_INVALIDARG) code = COM.S_FALSE; // proxy doesn't know about app childID
		return code;
	}

	int get_accKeyboardShortcut(int varChild_vt, int varChild_reserved1, int varChild_lVal, int varChild_reserved2, int pszKeyboardShortcut) {
		if (iaccessible == null) return COM.CO_E_OBJNOTCONNECTED;
		if ((varChild_vt & 0xFFFF) != COM.VT_I4) return COM.E_INVALIDARG;
		
		/* Get the default keyboard shortcut from the OS. */
		String osKeyboardShortcut = null;
		int code = iaccessible.get_accKeyboardShortcut(varChild_vt, varChild_reserved1, varChild_lVal, varChild_reserved2, pszKeyboardShortcut);
		if (code == COM.E_INVALIDARG) code = COM.S_FALSE; // proxy doesn't know about app childID
		if (accessibleListeners.size() == 0) return code;
		if (code == COM.S_OK) {
			int[] pKeyboardShortcut = new int[1];
			COM.MoveMemory(pKeyboardShortcut, pszKeyboardShortcut, 4);
			int size = COM.SysStringByteLen(pKeyboardShortcut[0]);
			if (size > 0) {
				char[] buffer = new char[(size + 1) /2];
				COM.MoveMemory(buffer, pKeyboardShortcut[0], size);
				osKeyboardShortcut = new String(buffer);
			}
		}

		AccessibleEvent event = new AccessibleEvent(this);
		event.childID = osToChildID(varChild_lVal);
		event.result = osKeyboardShortcut;
		for (int i = 0; i < accessibleListeners.size(); i++) {
			AccessibleListener listener = (AccessibleListener) accessibleListeners.elementAt(i);
			listener.getKeyboardShortcut(event);
		}
		if (event.result == null) return code;
		char[] data = (event.result + "\0").toCharArray();
		int ptr = COM.SysAllocString(data);
		COM.MoveMemory(pszKeyboardShortcut, new int[] { ptr }, 4);
		return COM.S_OK;
	}
	
	int get_accName(int varChild_vt, int varChild_reserved1, int varChild_lVal, int varChild_reserved2, int pszName) {
		if (iaccessible == null) return COM.CO_E_OBJNOTCONNECTED;
		if ((varChild_vt & 0xFFFF) != COM.VT_I4) return COM.E_INVALIDARG;

		/* Get the default name from the OS. */
		String osName = null;
		int code = iaccessible.get_accName(varChild_vt, varChild_reserved1, varChild_lVal, varChild_reserved2, pszName);
		if (code == COM.E_INVALIDARG) code = COM.S_FALSE; // proxy doesn't know about app childID
		if (accessibleListeners.size() == 0) return code;
		if (code == COM.S_OK) {
			int[] pName = new int[1];
			COM.MoveMemory(pName, pszName, 4);
			int size = COM.SysStringByteLen(pName[0]);
			if (size > 0) {
				char[] buffer = new char[(size + 1) /2];
				COM.MoveMemory(buffer, pName[0], size);
				osName = new String(buffer);
			}
		}

		AccessibleEvent event = new AccessibleEvent(this);
		event.childID = osToChildID(varChild_lVal);
		event.result = osName;
		for (int i = 0; i < accessibleListeners.size(); i++) {
			AccessibleListener listener = (AccessibleListener) accessibleListeners.elementAt(i);
			listener.getName(event);
		}
		if (event.result == null) return code;
		char[] data = (event.result + "\0").toCharArray();
		int ptr = COM.SysAllocString(data);
		COM.MoveMemory(pszName, new int[] { ptr }, 4);
		return COM.S_OK;
	}
	
	int get_accParent(int ppdispParent) {
		if (iaccessible == null) return COM.CO_E_OBJNOTCONNECTED;
		// Currently, we don't let the application override this. Forward to the proxy.
		return iaccessible.get_accParent(ppdispParent);
	}
	
	int get_accRole(int varChild_vt, int varChild_reserved1, int varChild_lVal, int varChild_reserved2, int pvarRole) {
		if (iaccessible == null) return COM.CO_E_OBJNOTCONNECTED;
		if ((varChild_vt & 0xFFFF) != COM.VT_I4) return COM.E_INVALIDARG;

		/* Get the default role from the OS. */
		int osRole = COM.ROLE_SYSTEM_CLIENT;
		int code = iaccessible.get_accRole(varChild_vt, varChild_reserved1, varChild_lVal, varChild_reserved2, pvarRole);
		if (code == COM.E_INVALIDARG) code = COM.S_FALSE; // proxy doesn't know about app childID
		// TEMPORARY CODE - process tree and table even if there are no apps listening
		if (accessibleControlListeners.size() == 0 && !(control instanceof Tree || control instanceof Table)) return code;
		if (code == COM.S_OK) {
			short[] pvt = new short[1];
			COM.MoveMemory(pvt, pvarRole, 2);
			if (pvt[0] == COM.VT_I4) {
				int[] pRole = new int[1];
				COM.MoveMemory(pRole, pvarRole + 8, 4);
				osRole = pRole[0];
			}
		}

		AccessibleControlEvent event = new AccessibleControlEvent(this);
		event.childID = osToChildID(varChild_lVal);
		event.detail = osToRole(osRole);
		// TEMPORARY CODE
		/* Currently our checkbox table and tree are emulated using state mask
		 * images, so we need to specify 'checkbox' role for the items. */
		if (varChild_lVal != COM.CHILDID_SELF) {
			if (control instanceof Tree || control instanceof Table) {
				if ((control.getStyle() & SWT.CHECK) != 0) event.detail = ACC.ROLE_CHECKBUTTON;
			}
		}
		for (int i = 0; i < accessibleControlListeners.size(); i++) {
			AccessibleControlListener listener = (AccessibleControlListener) accessibleControlListeners.elementAt(i);
			listener.getRole(event);
		}
		int role = roleToOs(event.detail);
		COM.MoveMemory(pvarRole, new short[] { COM.VT_I4 }, 2);
		COM.MoveMemory(pvarRole + 8, new int[] { role }, 4);
		return COM.S_OK;
	}
	
	int get_accSelection(int pvarChildren) {
		if (iaccessible == null) return COM.CO_E_OBJNOTCONNECTED;

		/* Get the default selection from the OS. */
		int osChild = ACC.CHILDID_NONE;
		int code = iaccessible.get_accSelection(pvarChildren);
		if (accessibleControlListeners.size() == 0) return code;
		if (code == COM.S_OK) {
			short[] pvt = new short[1];
			COM.MoveMemory(pvt, pvarChildren, 2);
			if (pvt[0] == COM.VT_I4) {
				int[] pChild = new int[1];
				COM.MoveMemory(pChild, pvarChildren + 8, 4);
				osChild = osToChildID(pChild[0]);
			} else if (pvt[0] == COM.VT_UNKNOWN) {
				osChild = ACC.CHILDID_MULTIPLE;
				/* Should get IEnumVARIANT from punkVal field... need better API here... */
			}
		}

		AccessibleControlEvent event = new AccessibleControlEvent(this);
		event.childID = osChild;
		for (int i = 0; i < accessibleControlListeners.size(); i++) {
			AccessibleControlListener listener = (AccessibleControlListener) accessibleControlListeners.elementAt(i);
			listener.getSelection(event);
		}
		Accessible accessible = event.accessible;
		if (accessible != null) {
			COM.MoveMemory(pvarChildren, new short[] { COM.VT_DISPATCH }, 2);
			COM.MoveMemory(pvarChildren + 8, new int[] { accessible.objIAccessible.getAddress() }, 4);
			return COM.S_OK;
		}
		int childID = event.childID;
		if (childID == ACC.CHILDID_NONE) {
			COM.MoveMemory(pvarChildren, new short[] { COM.VT_EMPTY }, 2);
			return COM.S_FALSE;
		}
		if (childID == ACC.CHILDID_MULTIPLE) {
			COM.MoveMemory(pvarChildren, new short[] { COM.VT_UNKNOWN }, 2);
			/* Should return an IEnumVARIANT for this... so the next line is wrong... need better API here... */
			COM.MoveMemory(pvarChildren + 8, new int[] { objIAccessible.getAddress() }, 4);
			return COM.S_OK;
		}
		if (childID == ACC.CHILDID_SELF) {
			COM.MoveMemory(pvarChildren, new short[] { COM.VT_DISPATCH }, 2);
			COM.MoveMemory(pvarChildren + 8, new int[] { objIAccessible.getAddress() }, 4);
			return COM.S_OK;
		}
		COM.MoveMemory(pvarChildren, new short[] { COM.VT_I4 }, 2);
		COM.MoveMemory(pvarChildren + 8, new int[] { childIDToOs(childID) }, 4);
		return COM.S_OK;
	}
	
	int get_accState(int varChild_vt, int varChild_reserved1, int varChild_lVal, int varChild_reserved2, int pvarState) {
		if (iaccessible == null) return COM.CO_E_OBJNOTCONNECTED;
		if ((varChild_vt & 0xFFFF) != COM.VT_I4) return COM.E_INVALIDARG;

		/* Get the default state from the OS. */
		int osState = 0;
		int code = iaccessible.get_accState(varChild_vt, varChild_reserved1, varChild_lVal, varChild_reserved2, pvarState);
		if (code == COM.E_INVALIDARG) code = COM.S_FALSE; // proxy doesn't know about app childID
		// TEMPORARY CODE - process tree and table even if there are no apps listening
		if (accessibleControlListeners.size() == 0 && !(control instanceof Tree || control instanceof Table)) return code;
		if (code == COM.S_OK) {
			short[] pvt = new short[1];
			COM.MoveMemory(pvt, pvarState, 2);
			if (pvt[0] == COM.VT_I4) {
				int[] pState = new int[1];
				COM.MoveMemory(pState, pvarState + 8, 4);
				osState = pState[0];
			}
		}

		AccessibleControlEvent event = new AccessibleControlEvent(this);
		event.childID = osToChildID(varChild_lVal);
		event.detail = osToState(osState);
		// TEMPORARY CODE
		/* Currently our checkbox table and tree are emulated using state mask
		 * images, so we need to determine if the item state is 'checked'. */
		if (varChild_lVal != COM.CHILDID_SELF) {
			if (control instanceof Tree) {
				int hwnd = control.handle;
				TVITEM tvItem = new TVITEM ();
				tvItem.mask = OS.TVIF_HANDLE | OS.TVIF_STATE;
				tvItem.stateMask = OS.TVIS_STATEIMAGEMASK;
				if (OS.COMCTL32_MAJOR >= 6) {
					tvItem.hItem = OS.SendMessage (hwnd, OS.TVM_MAPACCIDTOHTREEITEM, varChild_lVal, 0);
				} else {
					tvItem.hItem = varChild_lVal;
				}
				int result = OS.SendMessage (hwnd, OS.TVM_GETITEM, 0, tvItem);
				boolean checked = (result != 0) && (((tvItem.state >> 12) & 1) == 0);
				if (checked) event.detail |= ACC.STATE_CHECKED;
			} else if (control instanceof Table) {
				Table table = (Table) control;
				TableItem item = table.getItem(event.childID);
				if (item != null) {
					if (item.getChecked()) event.detail |= ACC.STATE_CHECKED;
				}
			}
		}
		for (int i = 0; i < accessibleControlListeners.size(); i++) {
			AccessibleControlListener listener = (AccessibleControlListener) accessibleControlListeners.elementAt(i);
			listener.getState(event);
		}
		int state = stateToOs(event.detail);
		COM.MoveMemory(pvarState, new short[] { COM.VT_I4 }, 2);