зеркало из https://github.com/mozilla/gecko-dev.git
263 строки
8.9 KiB
C
263 строки
8.9 KiB
C
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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/*
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* Layer-specific data structures and declarations for HTML layout library.
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*/
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#ifndef _LAYLAYER_H
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#define _LAYLAYER_H
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#define LO_IGNORE_TAG_MARKER 0xFFFF
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typedef struct lo_Block lo_Block; /* Forward declaration */
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/*
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* This struct represents the layout side of a layer created with
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* a <(I)LAYER> tag. It holds onto the contents of the layer (in a cell)
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* along with lists of elements that are part of the layer's
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* "document".
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*/
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struct lo_LayerDocState
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{
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int32 id;
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LO_CellStruct *cell; /* Contents of layer */
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int32 height; /* Value of layer's HEIGHT attribute, or zero */
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PRPackedBool is_constructed_layer; /* Created with JS new operator ? */
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PRPackedBool overrideScrollWidth; /* Only used for _DOCUMENT layer */
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PRPackedBool overrideScrollHeight;
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int32 contentWidth; /* Dimensions of content, not including
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child layers. */
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int32 contentHeight;
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XP_Rect viewRect; /* Non-scrolling clip rectangle */
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CL_Layer *layer;
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void *mocha_object;
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lo_DocLists *doc_lists; /* Layout element lists, e.g. embeds, forms */
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lo_Block *temp_block; /* Data used during HTML layer layout and reflow */
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};
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struct lo_LayerStack {
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lo_LayerDocState *layer_state;
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lo_LayerStack *next;
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};
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/* A layer closure is the piece of layout-specific data that gets
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attached as client-data to a CL_Layer. They come in all different
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flavors, depending on the purpose of the layer. */
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/* Cheap inheritance: Struct members common to all types of layer closures */
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#define LO_LAYER_CLOSURE_STRUCT_MEMBERS \
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LO_LayerType type; \
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MWContext *context
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typedef struct lo_BlinkLayerClosure {
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LO_LAYER_CLOSURE_STRUCT_MEMBERS;
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LO_TextStruct *text; /* The text element that's blinking */
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} lo_BlinkLayerClosure;
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typedef struct lo_ImageLayerClosure {
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LO_LAYER_CLOSURE_STRUCT_MEMBERS;
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LO_ImageStruct *image; /* The layout image element */
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} lo_ImageLayerClosure;
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typedef struct lo_CellBGLayerClosure {
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LO_LAYER_CLOSURE_STRUCT_MEMBERS;
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LO_CellStruct *cell; /* The cell that we're the background for */
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} lo_CellBGLayerClosure;
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typedef struct lo_HTMLBlockClosure {
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LO_LAYER_CLOSURE_STRUCT_MEMBERS;
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int32 x_offset; /* Layout imposed offset for in-flow layers */
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int32 y_offset;
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lo_DocState *state; /* The layout document state */
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lo_LayerDocState *layer_state; /* The layer doc state */
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PRBool is_inflow;
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} lo_HTMLBlockClosure;
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typedef struct lo_HTMLBodyClosure {
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LO_LAYER_CLOSURE_STRUCT_MEMBERS;
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CL_Layer *layer;
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} lo_HTMLBodyClosure;
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typedef struct lo_EmbeddedObjectClosure {
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LO_LAYER_CLOSURE_STRUCT_MEMBERS;
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LO_Element *element; /* Plugin, Java applet, or form element */
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PRPackedBool is_windowed;
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} lo_EmbeddedObjectClosure;
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/* This struct belongs to the main container layer for a group of
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related layers, i.e. the layer that is reflected by the <LAYER> or
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<ILAYER> tags. It has child layers that represent the layer's
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background, HTML contents, table cell backdrop layers, etc. */
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typedef struct lo_GroupLayerClosure {
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LO_LAYER_CLOSURE_STRUCT_MEMBERS;
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int32 x_offset; /* Layout imposed offset for in-flow layers */
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int32 y_offset;
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CL_Layer *content_layer; /* The child content layer */
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CL_Layer *background_layer; /* The child background layer */
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int32 wrap_width; /* Pixel position at which text wraps */
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int clip_expansion_policy;
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PRBool is_inflow;
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lo_LayerDocState *layer_state; /* The layer doc state */
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} lo_GroupLayerClosure;
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/* A background layer encompasses either the entire canvas (document),
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a single layer, or a single background cell. */
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typedef enum {
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BG_DOCUMENT,
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BG_LAYER,
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BG_CELL
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} lo_BackgroundType;
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typedef struct lo_BackgroundLayerClosure {
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LO_LAYER_CLOSURE_STRUCT_MEMBERS;
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LO_Color *bg_color;
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LO_ImageStruct *backdrop_image;
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lo_TileMode tile_mode;
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lo_BackgroundType bg_type;
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LO_CellStruct *cell;
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} lo_BackgroundLayerClosure;
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typedef struct lo_AnyLayerClosure {
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LO_LAYER_CLOSURE_STRUCT_MEMBERS;
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} lo_AnyLayerClosure;
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typedef union lo_LayerClosure {
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lo_AnyLayerClosure any_closure;
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lo_BlinkLayerClosure blink_closure;
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lo_ImageLayerClosure image_closure;
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lo_CellBGLayerClosure cellbg_closure;
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lo_HTMLBlockClosure block_closure;
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lo_HTMLBodyClosure body_closure;
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lo_GroupLayerClosure group_closure;
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lo_BackgroundLayerClosure background_closure;
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lo_EmbeddedObjectClosure object_closure; /* plugin, java, form */
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} lo_LayerClosure;
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extern void
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lo_CreateBlinkLayer (MWContext *context, LO_TextStruct *text,
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CL_Layer *parent);
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extern void
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lo_DestroyBlinkers(MWContext *context);
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extern void
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lo_UpdateBlinkLayers(MWContext *context);
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extern CL_Layer *
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lo_CreateBlockLayer(MWContext *context,
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char *name,
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PRBool is_inflow,
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int32 x_offset, int32 y_offset,
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int32 wrap_width,
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lo_LayerDocState *layer_state,
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lo_DocState *state);
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extern void
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lo_CreateDefaultLayers(MWContext *context,
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CL_Layer **doc_layer, CL_Layer **body_layer);
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extern void
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lo_AttachHTMLLayer(MWContext *context, CL_Layer *layer, CL_Layer *parent,
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char *above, char *below, int32 z_order);
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extern PRBool lo_InsideLayer(lo_DocState *state);
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extern PRBool lo_InsideInflowLayer(lo_DocState *state);
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extern lo_LayerDocState * lo_NewLayerState(MWContext *context);
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extern void lo_DeleteLayerState(MWContext *context, lo_DocState *state,
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lo_LayerDocState *layer_state);
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extern void lo_AddLineListToLayer(MWContext *, lo_DocState *, LO_Element *);
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extern CL_Layer *
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lo_CreateCellBackgroundLayer(MWContext *context, LO_CellStruct *cell,
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CL_Layer *parent_layer, int16 table_nesting_level);
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extern CL_Layer *
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lo_CreateEmbedLayer(MWContext *context, CL_Layer *parent,
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int32 x, int32 y, int32 width, int32 height,
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LO_EmbedStruct *embed, lo_DocState *state);
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extern CL_Layer *
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lo_CreateEmbeddedObjectLayer(MWContext *context, lo_DocState *state,
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LO_Element *tptr);
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extern CL_Layer *
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lo_CreateImageLayer (MWContext *context, LO_ImageStruct *text,
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CL_Layer *parent);
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extern void lo_ActivateImageLayer(MWContext *context, LO_ImageStruct *image);
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extern void
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lo_PushLayerState(lo_TopState *top_state, lo_LayerDocState *layer_state);
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extern lo_LayerDocState *
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lo_PopLayerState(lo_DocState *state);
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extern lo_LayerDocState *
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lo_CurrentLayerState(lo_DocState *state);
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extern void
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lo_DeleteLayerStack(lo_DocState *state);
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extern int32
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lo_CurrentLayerId(lo_DocState *state);
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extern CL_Layer *
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lo_CurrentLayer(lo_DocState *state);
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extern PRBool
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lo_IsCurrentLayerDynamic(lo_DocState *state);
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extern PRBool
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lo_IsTagInSourcedLayer(lo_DocState *state, PA_Tag *tag);
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extern PRBool
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lo_IsAnyCurrentAncestorSourced(lo_DocState *state);
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extern PRBool
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lo_IsAnyCurrentAncestorDynamic(lo_DocState *state);
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extern lo_LayerDocState *
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lo_GetLayerState(CL_Layer *layer);
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extern int32
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lo_GetEnclosingLayerHeight(lo_DocState *state);
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extern int32
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lo_GetEnclosingLayerWidth(lo_DocState *state);
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LO_CellStruct *
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lo_GetCellFromLayer(MWContext *context, CL_Layer *layer);
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extern void
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lo_OffsetInflowLayer(CL_Layer *layer, int32 dx, int32 dy);
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extern void
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lo_BlockLayerTag(MWContext *context, lo_DocState *state, PA_Tag *tag);
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extern void
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lo_UnblockLayerTag(lo_DocState *state);
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extern void
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lo_FinishLayerLayout(MWContext *context, lo_DocState *state, int mocha_event);
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extern void
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lo_GetLayerXYShift(CL_Layer *layer, int32 *xp, int32 *yp);
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extern void
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lo_DestroyLayers(MWContext *context);
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extern lo_LayerDocState *
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lo_append_to_layer_array(MWContext *context, lo_TopState *top_state,
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lo_DocState *state,
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lo_LayerDocState *layer_state);
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extern void
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lo_SetLayerBackdropTileMode(CL_Layer *layer, lo_TileMode tile_mode);
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extern void lo_EndLayerTag(MWContext *, lo_DocState *, PA_Tag *tag);
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#endif /* _LAYLAYER_H */
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