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comparison: layout/xul/grid/nsIGridPart.h
layout/xul/grid/nsIGridPart.h
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
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| -1:000000000000 | 0:8ce78ff225a9 |
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| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 #ifndef nsIGridPart_h___ | |
| 7 #define nsIGridPart_h___ | |
| 8 | |
| 9 #include "nsISupports.h" | |
| 10 | |
| 11 class nsGridRowGroupLayout; | |
| 12 class nsGrid; | |
| 13 class nsGridRowLayout; | |
| 14 class nsGridRow; | |
| 15 class nsGridLayout2; | |
| 16 | |
| 17 // 07373ed7-e947-4a5e-b36c-69f7c195677b | |
| 18 #define NS_IGRIDPART_IID \ | |
| 19 { 0x07373ed7, 0xe947, 0x4a5e, \ | |
| 20 { 0xb3, 0x6c, 0x69, 0xf7, 0xc1, 0x95, 0x67, 0x7b } } | |
| 21 | |
| 22 /** | |
| 23 * An additional interface implemented by nsBoxLayout implementations | |
| 24 * for parts of a grid (excluding cells, which are not special). | |
| 25 */ | |
| 26 class nsIGridPart : public nsISupports { | |
| 27 | |
| 28 public: | |
| 29 | |
| 30 NS_DECLARE_STATIC_IID_ACCESSOR(NS_IGRIDPART_IID) | |
| 31 | |
| 32 virtual nsGridRowGroupLayout* CastToRowGroupLayout()=0; | |
| 33 virtual nsGridLayout2* CastToGridLayout()=0; | |
| 34 | |
| 35 /** | |
| 36 * @param aBox [IN] The other half of the |this| parameter, i.e., the box | |
| 37 * whose layout manager is |this|. | |
| 38 * @param aIndex [INOUT] For callers not setting aRequestor, the value | |
| 39 * pointed to by aIndex is incremented by the index | |
| 40 * of the row (aBox) within its row group; if aBox | |
| 41 * is not a row/column, it is untouched. | |
| 42 * The implementation does this by doing the aIndex | |
| 43 * incrementing in the call to the parent row group | |
| 44 * when aRequestor is non-null. | |
| 45 * @param aRequestor [IN] Non-null if and only if this is a recursive | |
| 46 * call from the GetGrid method on a child grid part, | |
| 47 * in which case it is a pointer to that grid part. | |
| 48 * (This may only be non-null for row groups and | |
| 49 * grids.) | |
| 50 * @return The grid of which aBox (a row, row group, or grid) is a part. | |
| 51 */ | |
| 52 virtual nsGrid* GetGrid(nsIFrame* aBox, int32_t* aIndex, nsGridRowLayout* aRequestor=nullptr)=0; | |
| 53 | |
| 54 /** | |
| 55 * @param aBox [IN] The other half of the |this| parameter, i.e., the box | |
| 56 * whose layout manager is |this|. | |
| 57 * @param aParentBox [OUT] The box representing the next level up in | |
| 58 * the grid (i.e., row group for a row, grid for a | |
| 59 * row group). | |
| 60 * @returns The layout manager for aParentBox. | |
| 61 */ | |
| 62 virtual nsIGridPart* GetParentGridPart(nsIFrame* aBox, nsIFrame** aParentBox) = 0; | |
| 63 | |
| 64 /** | |
| 65 * @param aBox [IN] The other half of the |this| parameter, i.e., the box | |
| 66 * whose layout manager is |this|. | |
| 67 * @param aRowCount [INOUT] Row count | |
| 68 * @param aComputedColumnCount [INOUT] Column count | |
| 69 */ | |
| 70 virtual void CountRowsColumns(nsIFrame* aBox, int32_t& aRowCount, int32_t& aComputedColumnCount)=0; | |
| 71 virtual void DirtyRows(nsIFrame* aBox, nsBoxLayoutState& aState)=0; | |
| 72 virtual int32_t BuildRows(nsIFrame* aBox, nsGridRow* aRows)=0; | |
| 73 virtual nsMargin GetTotalMargin(nsIFrame* aBox, bool aIsHorizontal)=0; | |
| 74 virtual int32_t GetRowCount() { return 1; } | |
| 75 | |
| 76 /** | |
| 77 * Return the level of the grid hierarchy this grid part represents. | |
| 78 */ | |
| 79 enum Type { eGrid, eRowGroup, eRowLeaf }; | |
| 80 virtual Type GetType()=0; | |
| 81 | |
| 82 /** | |
| 83 * Return whether this grid part is an appropriate parent for the argument. | |
| 84 */ | |
| 85 bool CanContain(nsIGridPart* aPossibleChild) { | |
| 86 Type thisType = GetType(), childType = aPossibleChild->GetType(); | |
| 87 return thisType + 1 == childType || (thisType == eRowGroup && childType == eRowGroup); | |
| 88 } | |
| 89 | |
| 90 }; | |
| 91 | |
| 92 NS_DEFINE_STATIC_IID_ACCESSOR(nsIGridPart, NS_IGRIDPART_IID) | |
| 93 | |
| 94 #endif | |
| 95 |
