gecko-dev/accessible/atk/nsMaiInterfaceText.cpp

489 строки
14 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/* 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/. */
#include "InterfaceInitFuncs.h"
#include "Accessible-inl.h"
#include "HyperTextAccessible-inl.h"
#include "nsMai.h"
#include "nsIAccessibleTypes.h"
#include "nsIPersistentProperties2.h"
#include "nsISimpleEnumerator.h"
#include "mozilla/Likely.h"
using namespace mozilla;
using namespace mozilla::a11y;
static const char* sAtkTextAttrNames[ATK_TEXT_ATTR_LAST_DEFINED];
static AtkAttributeSet*
ConvertToAtkTextAttributeSet(nsIPersistentProperties* aAttributes)
{
if (!aAttributes)
return nullptr;
AtkAttributeSet* objAttributeSet = nullptr;
nsCOMPtr<nsISimpleEnumerator> propEnum;
nsresult rv = aAttributes->Enumerate(getter_AddRefs(propEnum));
NS_ENSURE_SUCCESS(rv, nullptr);
bool hasMore = false;
while (NS_SUCCEEDED(propEnum->HasMoreElements(&hasMore)) && hasMore) {
nsCOMPtr<nsISupports> sup;
rv = propEnum->GetNext(getter_AddRefs(sup));
NS_ENSURE_SUCCESS(rv, objAttributeSet);
nsCOMPtr<nsIPropertyElement> propElem(do_QueryInterface(sup));
NS_ENSURE_TRUE(propElem, objAttributeSet);
nsAutoCString name;
rv = propElem->GetKey(name);
NS_ENSURE_SUCCESS(rv, objAttributeSet);
nsAutoString value;
rv = propElem->GetValue(value);
NS_ENSURE_SUCCESS(rv, objAttributeSet);
AtkAttribute* objAttr = (AtkAttribute*)g_malloc(sizeof(AtkAttribute));
objAttr->name = g_strdup(name.get());
objAttr->value = g_strdup(NS_ConvertUTF16toUTF8(value).get());
objAttributeSet = g_slist_prepend(objAttributeSet, objAttr);
// Handle attributes where atk has its own name.
const char* atkName = nullptr;
nsAutoString atkValue;
if (name.EqualsLiteral("color")) {
// The format of the atk attribute is r,g,b and the gecko one is
// rgb(r,g,b).
atkValue = Substring(value, 5, value.Length() - 1);
atkName = sAtkTextAttrNames[ATK_TEXT_ATTR_FG_COLOR];
} else if (name.EqualsLiteral("background-color")) {
// The format of the atk attribute is r,g,b and the gecko one is
// rgb(r,g,b).
atkValue = Substring(value, 5, value.Length() - 1);
atkName = sAtkTextAttrNames[ATK_TEXT_ATTR_BG_COLOR];
} else if (name.EqualsLiteral("font-family")) {
atkValue = value;
atkName = sAtkTextAttrNames[ATK_TEXT_ATTR_FAMILY_NAME];
} else if (name.EqualsLiteral("font-size")) {
// ATK wants the number of pixels without px at the end.
atkValue = StringHead(value, value.Length() - 2);
atkName = sAtkTextAttrNames[ATK_TEXT_ATTR_SIZE];
} else if (name.EqualsLiteral("font-weight")) {
atkValue = value;
atkName = sAtkTextAttrNames[ATK_TEXT_ATTR_WEIGHT];
} else if (name.EqualsLiteral("invalid")) {
atkValue = value;
atkName = sAtkTextAttrNames[ATK_TEXT_ATTR_INVALID];
}
if (atkName) {
objAttr = static_cast<AtkAttribute*>(g_malloc(sizeof(AtkAttribute)));
objAttr->name = g_strdup(atkName);
objAttr->value = g_strdup(NS_ConvertUTF16toUTF8(atkValue).get());
objAttributeSet = g_slist_prepend(objAttributeSet, objAttr);
}
}
// libatk-adaptor will free it
return objAttributeSet;
}
static void
ConvertTexttoAsterisks(AccessibleWrap* accWrap, nsAString& aString)
{
// convert each char to "*" when it's "password text"
if (accWrap->NativeRole() == roles::PASSWORD_TEXT) {
for (uint32_t i = 0; i < aString.Length(); i++)
aString.Replace(i, 1, NS_LITERAL_STRING("*"));
}
}
extern "C" {
static gchar*
getTextCB(AtkText *aText, gint aStartOffset, gint aEndOffset)
{
AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
if (!accWrap)
return nullptr;
HyperTextAccessible* text = accWrap->AsHyperText();
if (!text || !text->IsTextRole())
return nullptr;
nsAutoString autoStr;
text->TextSubstring(aStartOffset, aEndOffset, autoStr);
ConvertTexttoAsterisks(accWrap, autoStr);
NS_ConvertUTF16toUTF8 cautoStr(autoStr);
//copy and return, libspi will free it.
return (cautoStr.get()) ? g_strdup(cautoStr.get()) : nullptr;
}
static gchar*
getTextAfterOffsetCB(AtkText *aText, gint aOffset,
AtkTextBoundary aBoundaryType,
gint *aStartOffset, gint *aEndOffset)
{
AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
if (!accWrap)
return nullptr;
HyperTextAccessible* text = accWrap->AsHyperText();
if (!text || !text->IsTextRole())
return nullptr;
nsAutoString autoStr;
int32_t startOffset = 0, endOffset = 0;
text->TextAfterOffset(aOffset, aBoundaryType, &startOffset, &endOffset, autoStr);
*aStartOffset = startOffset;
*aEndOffset = endOffset;
ConvertTexttoAsterisks(accWrap, autoStr);
NS_ConvertUTF16toUTF8 cautoStr(autoStr);
return (cautoStr.get()) ? g_strdup(cautoStr.get()) : nullptr;
}
static gchar*
getTextAtOffsetCB(AtkText *aText, gint aOffset,
AtkTextBoundary aBoundaryType,
gint *aStartOffset, gint *aEndOffset)
{
AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
if (!accWrap)
return nullptr;
HyperTextAccessible* text = accWrap->AsHyperText();
if (!text || !text->IsTextRole())
return nullptr;
nsAutoString autoStr;
int32_t startOffset = 0, endOffset = 0;
text->TextAtOffset(aOffset, aBoundaryType, &startOffset, &endOffset, autoStr);
*aStartOffset = startOffset;
*aEndOffset = endOffset;
ConvertTexttoAsterisks(accWrap, autoStr);
NS_ConvertUTF16toUTF8 cautoStr(autoStr);
return (cautoStr.get()) ? g_strdup(cautoStr.get()) : nullptr;
}
static gunichar
getCharacterAtOffsetCB(AtkText* aText, gint aOffset)
{
AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
if (!accWrap)
return 0;
HyperTextAccessible* text = accWrap->AsHyperText();
if (!text || !text->IsTextRole())
return 0;
// char16_t is unsigned short in Mozilla, gnuichar is guint32 in glib.
return static_cast<gunichar>(text->CharAt(aOffset));
}
static gchar*
getTextBeforeOffsetCB(AtkText *aText, gint aOffset,
AtkTextBoundary aBoundaryType,
gint *aStartOffset, gint *aEndOffset)
{
AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
if (!accWrap)
return nullptr;
HyperTextAccessible* text = accWrap->AsHyperText();
if (!text || !text->IsTextRole())
return nullptr;
nsAutoString autoStr;
int32_t startOffset = 0, endOffset = 0;
text->TextBeforeOffset(aOffset, aBoundaryType,
&startOffset, &endOffset, autoStr);
*aStartOffset = startOffset;
*aEndOffset = endOffset;
ConvertTexttoAsterisks(accWrap, autoStr);
NS_ConvertUTF16toUTF8 cautoStr(autoStr);
return (cautoStr.get()) ? g_strdup(cautoStr.get()) : nullptr;
}
static gint
getCaretOffsetCB(AtkText *aText)
{
AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
if (!accWrap)
return 0;
HyperTextAccessible* text = accWrap->AsHyperText();
if (!text || !text->IsTextRole())
return 0;
return static_cast<gint>(text->CaretOffset());
}
static AtkAttributeSet*
getRunAttributesCB(AtkText *aText, gint aOffset,
gint *aStartOffset,
gint *aEndOffset)
{
*aStartOffset = -1;
*aEndOffset = -1;
AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
if (!accWrap)
return nullptr;
HyperTextAccessible* text = accWrap->AsHyperText();
if (!text || !text->IsTextRole())
return nullptr;
int32_t startOffset = 0, endOffset = 0;
nsCOMPtr<nsIPersistentProperties> attributes =
text->TextAttributes(false, aOffset, &startOffset, &endOffset);
*aStartOffset = startOffset;
*aEndOffset = endOffset;
return ConvertToAtkTextAttributeSet(attributes);
}
static AtkAttributeSet*
getDefaultAttributesCB(AtkText *aText)
{
AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
if (!accWrap)
return nullptr;
HyperTextAccessible* text = accWrap->AsHyperText();
if (!text || !text->IsTextRole())
return nullptr;
nsCOMPtr<nsIPersistentProperties> attributes = text->DefaultTextAttributes();
return ConvertToAtkTextAttributeSet(attributes);
}
static void
getCharacterExtentsCB(AtkText *aText, gint aOffset,
gint *aX, gint *aY,
gint *aWidth, gint *aHeight,
AtkCoordType aCoords)
{
AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
if(!accWrap || !aX || !aY || !aWidth || !aHeight)
return;
HyperTextAccessible* text = accWrap->AsHyperText();
if (!text || !text->IsTextRole())
return;
uint32_t geckoCoordType;
if (aCoords == ATK_XY_SCREEN)
geckoCoordType = nsIAccessibleCoordinateType::COORDTYPE_SCREEN_RELATIVE;
else
geckoCoordType = nsIAccessibleCoordinateType::COORDTYPE_WINDOW_RELATIVE;
nsIntRect rect = text->CharBounds(aOffset, geckoCoordType);
*aX = rect.x;
*aY = rect.y;
*aWidth = rect.width;
*aHeight = rect.height;
}
static void
getRangeExtentsCB(AtkText *aText, gint aStartOffset, gint aEndOffset,
AtkCoordType aCoords, AtkTextRectangle *aRect)
{
AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
if(!accWrap || !aRect)
return;
HyperTextAccessible* text = accWrap->AsHyperText();
if (!text || !text->IsTextRole())
return;
uint32_t geckoCoordType;
if (aCoords == ATK_XY_SCREEN)
geckoCoordType = nsIAccessibleCoordinateType::COORDTYPE_SCREEN_RELATIVE;
else
geckoCoordType = nsIAccessibleCoordinateType::COORDTYPE_WINDOW_RELATIVE;
nsIntRect rect = text->TextBounds(aStartOffset, aEndOffset, geckoCoordType);
aRect->x = rect.x;
aRect->y = rect.y;
aRect->width = rect.width;
aRect->height = rect.height;
}
static gint
getCharacterCountCB(AtkText *aText)
{
AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
if (!accWrap)
return 0;
HyperTextAccessible* textAcc = accWrap->AsHyperText();
return textAcc->IsDefunct() ?
0 : static_cast<gint>(textAcc->CharacterCount());
}
static gint
getOffsetAtPointCB(AtkText *aText,
gint aX, gint aY,
AtkCoordType aCoords)
{
AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
if (!accWrap)
return -1;
HyperTextAccessible* text = accWrap->AsHyperText();
if (!text || !text->IsTextRole())
return -1;
return static_cast<gint>(
text->OffsetAtPoint(aX, aY,
(aCoords == ATK_XY_SCREEN ?
nsIAccessibleCoordinateType::COORDTYPE_SCREEN_RELATIVE :
nsIAccessibleCoordinateType::COORDTYPE_WINDOW_RELATIVE)));
}
static gint
getTextSelectionCountCB(AtkText *aText)
{
AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
if (!accWrap)
return 0;
HyperTextAccessible* text = accWrap->AsHyperText();
if (!text || !text->IsTextRole())
return 0;
return text->SelectionCount();
}
static gchar*
getTextSelectionCB(AtkText *aText, gint aSelectionNum,
gint *aStartOffset, gint *aEndOffset)
{
AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
if (!accWrap)
return nullptr;
HyperTextAccessible* text = accWrap->AsHyperText();
if (!text || !text->IsTextRole())
return nullptr;
int32_t startOffset = 0, endOffset = 0;
text->SelectionBoundsAt(aSelectionNum, &startOffset, &endOffset);
*aStartOffset = startOffset;
*aEndOffset = endOffset;
return getTextCB(aText, *aStartOffset, *aEndOffset);
}
// set methods
static gboolean
addTextSelectionCB(AtkText *aText,
gint aStartOffset,
gint aEndOffset)
{
AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
if (!accWrap)
return FALSE;
HyperTextAccessible* text = accWrap->AsHyperText();
if (!text || !text->IsTextRole())
return FALSE;
return text->AddToSelection(aStartOffset, aEndOffset);
}
static gboolean
removeTextSelectionCB(AtkText *aText,
gint aSelectionNum)
{
AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
if (!accWrap)
return FALSE;
HyperTextAccessible* text = accWrap->AsHyperText();
if (!text || !text->IsTextRole())
return FALSE;
return text->RemoveFromSelection(aSelectionNum);
}
static gboolean
setTextSelectionCB(AtkText *aText, gint aSelectionNum,
gint aStartOffset, gint aEndOffset)
{
AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
if (!accWrap)
return FALSE;
HyperTextAccessible* text = accWrap->AsHyperText();
if (!text || !text->IsTextRole())
return FALSE;
return text->SetSelectionBoundsAt(aSelectionNum, aStartOffset, aEndOffset);
}
static gboolean
setCaretOffsetCB(AtkText *aText, gint aOffset)
{
AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
if (!accWrap)
return FALSE;
HyperTextAccessible* text = accWrap->AsHyperText();
if (!text || !text->IsTextRole() || !text->IsValidOffset(aOffset))
return FALSE;
text->SetCaretOffset(aOffset);
return TRUE;
}
}
void
textInterfaceInitCB(AtkTextIface* aIface)
{
NS_ASSERTION(aIface, "Invalid aIface");
if (MOZ_UNLIKELY(!aIface))
return;
aIface->get_text = getTextCB;
aIface->get_text_after_offset = getTextAfterOffsetCB;
aIface->get_text_at_offset = getTextAtOffsetCB;
aIface->get_character_at_offset = getCharacterAtOffsetCB;
aIface->get_text_before_offset = getTextBeforeOffsetCB;
aIface->get_caret_offset = getCaretOffsetCB;
aIface->get_run_attributes = getRunAttributesCB;
aIface->get_default_attributes = getDefaultAttributesCB;
aIface->get_character_extents = getCharacterExtentsCB;
aIface->get_range_extents = getRangeExtentsCB;
aIface->get_character_count = getCharacterCountCB;
aIface->get_offset_at_point = getOffsetAtPointCB;
aIface->get_n_selections = getTextSelectionCountCB;
aIface->get_selection = getTextSelectionCB;
// set methods
aIface->add_selection = addTextSelectionCB;
aIface->remove_selection = removeTextSelectionCB;
aIface->set_selection = setTextSelectionCB;
aIface->set_caret_offset = setCaretOffsetCB;
// Cache the string values of the atk text attribute names.
for (uint32_t i = 0; i < ArrayLength(sAtkTextAttrNames); i++)
sAtkTextAttrNames[i] =
atk_text_attribute_get_name(static_cast<AtkTextAttribute>(i));
}